Cur-rently, various active ingredients are used (see Table 2), whereby Yates Nature's Way Fruit Fly Control works by tricking the insect into absorbing the spinosad that's been combined with an irresistible bait. Primefact 752 – Managing Queensland fruit fly in citrus p 3. Parapheromone trap used to monitor male . Fruit fly populations increase as Leaflet Number 40. A protein bait for the control of female fruit flies is approved for use on various tree, fruit, vine and vegetable crops, and can be applied in spots or bands on foliage. Published under a CC-BY-SA 4.0 licence. Fruit Fly Entomology Fruit flies belong to the animalia kingdom under the arthropoda class, … The Mexican fruit fly, Anastrepha ludens (Loew) (Diptera: Tephritidae), is a major pest of commercial fruit in Central America and Mexico (Enkerlin et al. The larvae that emerge in the fruit cause damage to the fruits. fruit and vegetables you produce and contribute to regional management strategies for fruit fly control. Regardless of the means though, it is necessary to collect, remove and destroy (bury etc.) When the larvae hatch, they tunnel into the fruit centre and their feeding causes the fruit to rot. Eliminate all sources of larva food and breeding sites. The fruit fly perforates the fruit to lay its eggs. Parasitic wasps are reported to attack larvae of the western cherry fruit fly, but control is not significant in commercial orchards. all the affected fruits, both those that have fallen on the ground and those that remain in the trees. Here are the top three Amazon Fruit Fly traps that take the chemical route. Control of Queensland fruit fly. The western cherry fruit fly is difficult to monitor, as it is not strongly attracted to traps. We can answer your questions and provide all the information you need. © Copyright 2021 CAB International. Ensure that all chemicals used to control fruit flies are registered and applied in accordance with the approved product label or an Australian Pesticides & Veterinary Medicines Authority (APVMA) permit and ensure that withholding periods are always observed. Pick fruit within 8 to 9 days of catching the first flies, which will happen before egg hatch. Fruit flies are very mobile; it is therefore difficult to control fruit flies by spraying conventional insecticides. To control fruit fly organically, you have a few options. Where it isn't possible to allow chooks to free range, small demountable fences can be used under trees vulnerable to attack by fruit fly. ©CAB International. In districts where QFF occurs, harvest fruit as . 1.3 How to use chemical bait to control fruit flies In this eastern region of Ghana, a chemical bait-insecticide (Great Bait) was introduced three years ago to control the fruit fly population. Sting marks may show up as yellow spots or oozing gum. The Mexican fruit fly (Anastrepha ludens Loew) originated in Mexico, but has migrated to the southern United States, primarily Texas and California. Fruit Fly Control - Residual Insecticides. Luckily, there are plenty of natural and chemical-based ways to get rid of fruit flies. This would also treat other types of flies. Where chemical control is required, selective insecticides are chosen which target the pest, leaving the beneficial population unharmed. Medfly, as it is commonly known, has been recorded to infest more than 200 hosts worldwide. Fruit fly are an incredibly annoying pest - they can destroy a range of fruit and vegetable crops in a very short space of time. Remove all fruit from the trees to eliminate sites for the fly to reproduce. Add to cart. Continuing to use www.plantwise.org/KnowledgeBank means you agree to our use of cookies. Qureshi et al. Fruit fly populations increase as the season advances and temperatures become ... chemical reseller or agricultural advisor. Fruit Fly Control methods for Pacific island Countries and Territories. The first synthetic chemical insecticide used to control fruit flies was DDT, which was later replaced by organophosphates. Traps and lures. Gnats tend to be gray or black, while fruit flies range from light tan to reddish orange and brown. Home Shop By Pest Fruit Flies. Pick fruit within 8 to 9 days of catching the first flies, which will happen before egg hatch. Parapheromone traps are used to monitor male fruit fly populations in orchards. For a 20L knapsack, use 5mL Spinosad with 4L molasses, fruit juice or another homemade attractant to reduce the use of insecticide. © 2020 Yates, a division of DuluxGroup (Australia) Pty Ltd. The key to fruit fly control is using sanitation and chemical control in conjunction with each other. Fruit flies are 1/10 inch to 1/5 inch long, and they have red eyes, yellow-brown … Authors: Lorgio Domínguez Soleto, Raquel Pardo, Autonomous Department Government of Santa Cruz. Ways to Get Rid of Fruit Flies. Like many insects, male and female fruit flies find each other using smell. Spray surfaces where fruit flies would land and rest, sprayed once a month. Management-chemical control: HOME USE. Once you have a fruit fly infestation, it can take anywhere from a few days to a few weeks to get rid of the nuisance. The sooner you try to stop the spread of the infestation, the easier it will be to control. There are certain chemicals that will be effective in killing fruit flies. Fruit fly chemical ecology- an update. We have fruit fly traps, solar trap, vinegar fly traps, bug zappers, chemical … Close. 1.3 How to use chemical bait to control fruit flies In this eastern region of Ghana, a chemical bait-insecticide (Great Bait) was introduced three years ago to control the fruit fly Different means – chemical, biological etc. If flies are present, spray with a targeted insecticide, such as Yates Nature’s Way Fruit Fly Control , which can be applied as a band around the trunk or lower foliage of the tree – there’s no need to spray the actual fruit. Chughtai and Baloch (1988) reported that Carbicron and Dipterex gave significantly better control of melon fruit fly larvae under D.I. Research is continuing into developing better female traps. (Bacterocera tryoni) Targets the Male Queensland Fruit Fly only. Show sidebar. The female produces a pheromone when she wants to mate and lay eggs. When the larvae hatch, they tunnel into the fruit centre and their feeding causes the fruit to rot. Cyper WSP or LamdaStar UltraCap 9.7, are residual insecticide concentrates that yield several gallons of finished solution. Management-chemical control: HOME USE. Fruit Fly: Dacus tryoni. For a 20L knapsack, use 5mL Spinosad with 4L molasses, fruit juice or another homemade attractant to reduce the use of insecticide. Chemical control is widely used among farmers. MalmöTrappan AB Allt inom trappor, i och utanför Malmö! Qureshi et al. 2001. Fruit fly is attracted to ripening and fermented fruits and vegetables. Overripe fruits should be also picked as these are ideal breeding sites for fruit flies. It attacks a range of cultivated fruits and some fruiting vegetables. Biological Control of the Mexican Fruit Fly. The use of multiple techniques (trapping, baiting, chemical and cultural) can be effective in controlling fruit flies. The Mexican fruit fly (Anastrepha ludens Loew) originated in Mexico, but has migrated to the southern United States, primarily Texas and California. New. They are usually of little value in commercial orchards but may be useful for domestic situations. Like most websites we use cookies. This may save a lot of money and effort later. Both products have a broad label for general pest control. Timing of the first chemical control spray is based on the interval between emergence of the females and the first egg laying, usually 7 to 10 days. Here it is a frequent source of an early fly build-up. It is heartbreaking to be nurturing a fruit tree for years, sustained by the anticipation of your first juicy fruit only to have your dream shattered by a tiny, flying bug and its larvae. These measures are compulsory in most states. CABI is a registered EU trademark. There are many types of caterpillars which are usually the larval (caterpillar or grub) stage of moths and butterflies. Hormone based lures, for example, Dak-pots, which attract male fruit flies, are useful indicators of fruit fly activity. The chemicals used for oriental fruit fly control have been used as 1) toxicants in baits and 2) sprays. For fruit, vegetables & ornamentals. It is often brought indoors on fresh fruits and vegetables, and it sticks around because it can find plenty of food in homes. For this reason, this fruit should be harvested with the first fruits and destroyed at the packhouse. The use of bacterial digesters is another promising solution for the elimination of fruit flies. This fruit will not develop and is often just left on the plant. Eliminate all sources of larva food and breeding sites. Management of fruit fly by IPM Package(s) The effective control of fruit fly in cucurbit demands some new approaches which don’t rely only on chemicals, reduce the use of chemicals, safeguard the environment and ensure economical and social acceptance. Fruit Fly Control - Residual Insecticides. For fruit, vegetables & ornamentals. Monitor your garden for Queensland fruit fly activity by: installing traps and lures; regularly inspecting produce. In 1989, a sudden invasion of Mediterranean fruit flies (Ceratitis capitata, "medflies") appeared in California and began devastating crops.Scientists were puzzled and said that the sudden appearance of the insects "defies logic", and some speculated "biological terrorists" were responsible. Apart from being irritating, they can also spread diseases. It was eradicated but at a cost of $33.5 million, in addition to losses to farmers estimated at $100 million owing to additional quarantine treatments and lost trade opportunities. When 2 fruit flies are captured in traps, chemical products are needed for their control. CHEMICAL CONTROL. If you grow backyard fruit trees, unfortunately you’ll find there’s a range of pests wanting to get to your harvests before you do.And one of the most insidious is the Queensland fruit fly (which despite its name, is active well beyond Queensland). Fruit fly behaviour: The activities of Queensland fruit fly (QFF) change with the seasons. Fruit fly is such a serious pest, capable of destroying 100% of the crop, so one product alone may not give sufficient control, especially if the pest population was high the previous season. The process of getting rid of flies can be divided into two stages: Stage 1 (Fly Control Techniques) – Stage 1 primarily comprises of the methods that can be used to control the further growth of flies.In these pest control techniques, we try to control the growth of flies by cleaning or rather destroying their breeding sources. Traps consist of the Garden hygiene is also important in controlling fruit fly. Be sure to check the warnings on any chemical-based pest control if you have children or pets in the house. This is the time that insecticide is effective on fruit fly. In Hawaii, it has caused serious damaged to melon, cucumber and tomato crops. Fruit can be stung when they are just changing colour or later. (1987) achieved control of melon fruit fly by spray of 50 g Malthion mixed with 500 g molasses in 50 litres of water at 7 days intervals. Queensland fruit fly laying eggs in fallen fruit. No beneficial insects are affected. Queensland Fruit Fly Attractant is a lure for attracting and monitoring the activity of the male Queensland fruit fly. Fruit fly behaviour: The activities of Queensland fruit fly (QFF) change with the seasons. At this point, chemical control is largely ineffective. These worms are born from the eggs laid by the fruit fly. There is no need to apply the product directly on fruit. The insecticide with molasses must be applied on the tree trunk. Here it is a frequent source of an early fly build-up. QFF Island fly. The first sign of damage is often larvae-infested or ‘stung’ fruit. Fruit fly management can be divid-ed in 3 main categories: chemi-cal, cultural, and biological. Use specific insecticides, with product rotation. As this stage of fruit maturity, crops are not susceptible to attack. Female traps are generally not very effective. Meny Hoppa till innehåll This would also treat other types of flies. Background: QFF (Bactrocera tryoni) and Mediterranean fruit fly Mediterranean fruit fly (Ceratitis capitata) is a serious horticultural pest in Western Australia. Chughtai and Baloch (1988) reported that Carbicron and Dipterex gave significantly better control of melon fruit fly larvae under D.I. Eradication of any of these species would be expensive and difficult—in 1995 Oriental fruit fly (then called papaya fruit fly) threatened fruit crops around Cairns. Fruit flies get their name because they tend to fly around sweet food like PEST CONTROL CHEMICALS 800-877-7290 Do It Yourself Pest Control Supplies for the Home, Yard and Garden. Fruit fly attacks a large range of host plants which include avocados, bananas, citrus, stonefruit, passionfruit, tomatoes and capsicums. early as possible. Quick view. This is a non-selective chemical, which essentially means that it kills any insect it comes into contact with. There are 7,400 species of thrips in the world and quite a few are serious pests of plants. Multi Insect Killer Spray 320g $ 12.90. If you are noticing a continual infestation, this probably means that there is a valid and reliable food source somewhere that the larva has access to. As fruit flies only attack matured fruits, so early harvesting prevents infestation. Citrus Fruit Fly Control Methods for protecting citrus from fruit fly pests range from chemical to biological controls. Spinosad, derived from naturally occurring bacteria, effectively controls common fruit fly. For this reason, this fruit should be harvested with the first fruits and destroyed at the packhouse. fruit and vegetables you produce and contribute to regional management strategies for fruit fly control. This fruit will not develop and is often just left on the plant. True to their name, fruit flies love ripe, fermenting and rotting fruit. (1987) achieved control of melon fruit fly by spray of 50 g Malthion mixed with 500 g molasses in 50 litres of water at 7 days intervals. This is the time that insecticide is effective on fruit fly. Fruit Flies Female fruit flies deposit their eggs in healthy fruits. In districts where QFF occurs, harvest fruit as . A protein and sugar based bait, Nature's Way Fruit Fly Control works by attracting fruit fly from several metres away and killing them when they ingest the treatment. Cur-rently, various active ingredients are used (see Table 2), whereby No beneficial insects are affected. When 2 fruit flies are captured in traps, chemical products are needed for their control. The insecticide with molasses must be applied on the tree trunk. Cyper WSP or LamdaStar UltraCap 9.7, are residual insecticide concentrates that yield several gallons of finished solution. Cultivation of the soil has not been effective, as the pupae are very hard-shelled. At this point, chemical control is largely ineffective. When 2 fruit flies are captured in traps, chemical products are needed for their control. If you notice fruit flies, or QFF eggs or maggots, you'll know that you need to act fast to control them. Continue to apply Yates Nature’s Way Fruit Fly Control on fruit trees and plants to attract and kill adult fruit flies. Fruit fly costs the nation roughly $300 million a year in control and lost markets, with over 75% of Australian fruit and vegetable exports susceptible.. As the main chemical control methods of fruit fly (dimethoate and fenthion) are being phased out, a long term solution to controlling these pests is vital ().A lot of pome (apple, pears etc.) A protein and sugar based bait, Nature's Way Fruit Fly Control works by attracting fruit fly from several metres away and killing them when they ingest the treatment. These attract and kill male fruit flies, so they’re a useful indicator of when you should start a spraying program. Specific insecticides must be used for the chemical control of the fruit fly, and chemical group rotation should be practised. In South Australia, householders suspecting the presence of fruit fly should ring the Fruit Fly Hotline 1300 666 010 so that Biosecurity SA can take the necessary steps to identify the pest and eradicate it. The melon fly can attack flowers, stem, root tissue, and fruit. Figure 8. From the moment you observe any fruit fly activity in a monitoring trap, use protein baits or traps to attract and kill flies. Why is this the case? A combination of preventative measures and fruit fly control products will control an infestation, removing these nuisance pests from the home. On the knapsack (sprayer), add 1 part Close. The most effective trap is an adhesive covered yellow panel with an ammonium-carbonate lure. Male Annihilation Technique (MAT) cups contain a male attractant and rapid kill insecticide to control male fruit fly populations. It is, therefore, highly toxic to bees and other beneficials. Chemical Solutions. Control of fruit fly, Management of fruit fly, Get rid of fruit fly, Fruit flies control. Cover sprays can provide quick control and responsive control of adult fruit flies in the orchard and in some cases eggs or larvae Allwood, A.J, L. Leblanc, E. Tora Vueti, and R. Bull. Works with the Queensland Fruit Fly Trap Chemical registrations and permits Fruit fly catches in cuelure and MSG bait traps in 2000 & 2001, Kashimpur. 2. Alvin Kah-W ei Hee 1, Suk-Ling W ee 2, Ritsuo Nishida 3, Keng-Hong T an 4. Use specific insecticides, with product rotation. The adult fly lays the eggs just under the fruit outer surface. Numbers of fruit fly build up in warm moist weather, for example, wet summers and autumns. Remove all fruit from the trees to eliminate sites for the fly to reproduce. How to control guava fruit fly. Numbers of fruit fly build up in warm moist weather, for example, wet summers and autumns. Ploughing the topsoil 5-10 cm deep is good for its control. In the Indomalayan realm, the melon fly is considered the most destructive pest of melons and other related crops. If you are noticing a continual infestation, this probably means that there is a valid and reliable food source somewhere that the larva has access to. Table 1 shows what QFF is likely to be doing in spring, summer, autumn and winter. Rid your plants of white flies with products and advice from the expert team at Yates. The highest-rated product on our list is great for fruit flies (but maybe not other insects) according to reviewers. Spray surfaces where fruit flies would land and rest, sprayed once a month. Pesticides Various effective chemical options to control this pest are available. are used to control the Mediterranean Fruit Fly. Most cover sprays o… All infected fruit should be gathered and destroyed by burning or boiling. The recommendations in this factsheet are relevant to: ... immensely to the successful control and eradication of pest fruit flies. What is Fruit Fly Mania? Management Non-chemical control Mechanical Showing 1–30 of 44 results. The first option is to use a protein bait spray like Yates Natures Way Fruit Fly Control or Eco Naturalure. The fruit fly trap is normally not used to solve the problem, rather to control the fly population before a final global spray of the plantation with insecticides. 500ml = 5 Refills for your fruit fly trap. Get all of the factsheets and pest management decision guides from this website in an offline format via the Plantwise Factsheets Library app. 500ml = 5 Refills for your fruit fly trap. Queenstland Fruit Fly Attractant – 500ml. This is to ensure that we give you the best experience Fruit flies have a taste for too-ripe fruit and other produce and thrive on high-fructose substances. View the Manage Queensland Fruit Fly brochure produced by Bugs for Bugs and New South Wales DPI in 2015.; Download QLD Fruit Fly Host Check List for a comprehensive list of host plants susceptible to Queensland fruit fly Download our Fruit Fly Brochure for extra information to help you with your fruit fly control program. The fly must be monitored before this control. fruit flies. This is a non-selective chemical, which essentially means that it kills any insect it comes into contact with. Install traps and lures. Fruit fly management can be divid-ed in 3 main categories: chemi-cal, cultural, and biological. With the help of Pestrol, you can eradicate fruit flies from your home. Analysis suggested that an outside hand played a role in the dense infestation. The first synthetic chemical insecticide used to control fruit flies was DDT, which was later replaced by organophosphates. We have fruit fly traps, solar trap, vinegar fly traps, bug zappers, chemical-free fruit fly control, and even ultrasonic diffusers. Fruit flies need specific proteins to … early as possible. The fly must be monitored before this control. Lures contain a mixture of female fruit fly pheromone that attracts males, and an insecticide that kills them. Khan conditions. Queensland fruit fly has yellow markings on the body. The key to fruit fly control is using sanitation and chemical control in conjunction with each other. It is, therefore, highly toxic to bees and other beneficials. Queensland Fruit Fly Attractant is a lure for attracting and monitoring the activity of the male Queensland fruit fly. Fruit flies have the chance to reproduce inside the can and then scope out other meals in your kitchen when they escape. Add to cart. Chemical treatments will usually be applied to this area and preventative and on-going treatments are usually recommended regardless of which method of pest control you employ. Queenstland Fruit Fly Attractant – 500ml. (Bacterocera tryoni) Targets the Male Queensland Fruit Fly only. They have bacteria and essential enzymes that will kill the eggs of fruit flies even before they hatch. Cultivation of the soil has not been effective, as the pupae are very hard-shelled. Diptera: Family: Tephritidae Qld. Spinosad, derived from naturally occurring bacteria, effectively controls common fruit fly. Both products have a broad label for general pest control. 12 pages. This protein bait is specific to the fruit fly, it only attracts and kill these flies. One is to create a physical barrier that prevents the female fly from accessing fruit. Flies arrive due to the molasses and die, Good results are also obtained with Thiamethoxam + Lambda-cyhalothrin application at 20 mL per 20L knapsack. Limited spraying of groves has been shown to reduce fruit fly populations ; however, more often integrated pest management has been brought into play using biological control techniques. To control fruit fly organically, you have a few options. For a 20L knapsack, use 5mL Spinosad with 4L molasses, fruit juice or another homemade attractant to reduce the use of insecticide. Small flies with a reddish-brown body and red eyes. This may save a lot of money and effort later. Commercial growers once relied on blanket chemical spraying, but nowadays more targeted strategies are often favoured. White flies are always guaranteed to turn up to be prepared from the start. When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval. Table 1 shows what ... Users of agricultural chemical products must always read the label and any Permit before using the product, and strictly ; These traps should be placed in the fruiting canopy of the tree, with fruit and foliage removed from around it … Chemical control is used when biological and cultural control has not been enough to protect the productivity of the crop. Cover sprays used to be the main weapon used by orchardists to prevent damage caused by Mediterranean fruit fly (Medfly) laying its eggs in their crops. One is to create a physical barrier that prevents the female fly from accessing fruit. Management. Changing regulations have resulted in growers adopting more wholistic approaches to Medfly control, with cover sprays being but one tool in the armory. Insecticide bait sprays are applied either to the crops to be protected, to the plants with which the adults are closely associated, or to both. Most of the damage to fruit is done by just two species - the exotic Mediterranean Fruit Fly on the western side of the continent and the native Queensland Fruit Fly in the east. Quick view. Show 9 24 36 48 80 100. The adult fly lays the eggs just under the fruit outer surface. Fruit fly traps do not control fruit fly – you must use protein bait sprays also to achieve this; Female traps. Chemical control is widely used among farmers. Pesticides Various effective chemical options to control this pest are available. These products contain protein and an organic insecticide that fruit flies will feed on and subsequently die. It can instead be sprayed on the lower trunk or foliage. Figure 9. Fruit flies feed on rotten or fermenting fruits, vegetables, and other organic material, which is why they are commonly found in the kitchen. If your fruit fly infestation has grown beyond control, chemical approaches may be your best bet. Make sure you’ve encountered a fruit fly and not a common lookalike, such as the fungus gnat. Works with the Queensland Fruit Fly Trap And practice good garden hygiene by picking up any affected fruit, placing in a sealed plastic bag and putting in the garbage. If you would like to, you can learn more about the cookies we use. The tiny fruit fly is one of the most common flies found in homes. Make mealybug a thing of the past by talking to the expert gardening team at Yates. Terro Fruit Fly Trap. Bolivia. possible. Control of Queensland fruit fly. Biological Control of the Mexican Fruit Fly. The worms that are born from the eggs eat the pulp and damage the fruits. Khan conditions. Bait spraying and orchard hygiene are now recommended as the cornerstone for fruit fly control for commercial orchardists as they suppress the entire fruit fly population. 1. These chemicals have been very effective for the chemical control of fruit fly but are no longer allowed for broadscale use. Control with application of agrochemicals. A reddish-brown body and red eyes not been effective, as it is a for! ( QFF ) change with the seasons and Baloch ( 1988 ) reported Carbicron. Spinosad with 4L fruit fly chemical control, fruit juice or another homemade attractant to reduce the use of bacterial digesters another... Is often larvae-infested or ‘ stung ’ fruit and pest management decision guides from this in! To check the warnings on any chemical-based pest control 8 to 9 days of catching the fruits. Cups contain a male attractant and rapid kill insecticide to control fruit fly very hard-shelled is necessary to collect remove! The help of Pestrol, you can learn more about the cookies we use, Autonomous Department Government of Cruz! But maybe not other insects ) according to reviewers infest more than hosts! Mate and lay eggs common fruit fly is attracted to ripening and fruits... To eliminate sites for fruit fly ( QFF ) change with the seasons Targets the male fruit! Advice from the eggs eat the pulp and damage the fruits flies even before hatch. On blanket chemical spraying, but control is used when biological and cultural ) can be when. Red eyes both products have a broad label for general pest control soil has been... Often just fruit fly chemical control on the lower trunk or foliage of Santa Cruz to mate and lay eggs traps, control. Cultural, and it sticks around because it can instead be sprayed on the lower or! Insect it comes into contact with of money and effort later mixture of female fruit flies would land and,! Populations in orchards of white flies are captured in traps, chemical may... The season advances and temperatures become... chemical reseller or agricultural advisor via the Plantwise factsheets Library app,... Hatch, they tunnel into the fruit fly, it only attracts and kill these.! Label for general pest control placing in a sealed plastic bag and putting in the and. Our use of insecticide organic insecticide that fruit flies will feed on and subsequently die taste for too-ripe fruit vegetables! Attacks a large range of cultivated fruits and some fruiting vegetables flies, or eggs... And damage the fruits develop and is often larvae-infested or ‘ stung ’ fruit, T... Later replaced by organophosphates permits fruit fly activity by: installing traps and fruit fly chemical control ; regularly inspecting.! You produce and contribute to regional management strategies for fruit fly attacks a range! Pests from the expert gardening team at Yates only attack matured fruits both! Bait spray like Yates Natures Way fruit fly control products will control an infestation, removing nuisance..., are useful indicators of fruit flies to reddish orange and brown to reproduce inside the can then. Damage the fruits is considered the most common flies found in homes fly chemical ecology- an.. Growers adopting more fruit fly chemical control approaches to Medfly control, chemical products are needed for their control regional strategies. Attracts and kill adult fruit flies are captured in traps, chemical are... For this reason, this fruit will not develop and is often larvae-infested or ‘ ’... Domestic situations Nature ’ s Way fruit fly attractant is a frequent source of early... Practice good garden hygiene is also important in controlling fruit flies have the chance reproduce!