"At that time, she was too young to know that every season was coming, and the milk tea shop secretly had new products." Teacher XiaoWei looked at the milk tea order and began to regret that she ordered succulent grapes, and should order succulent bayberry. Summer has passed, and May to June is the ripening harvest period of bayberry. The season of bayberry, just in time for the rainy season, the weather is humid and hot, fruit flies reproduce fast, if the control is not in place, then the flesh inside may become the nest of insect eggs, not only affecting the taste of bayberry, but also affecting the appearance. Today, on the topic of bayberry fruit fly, I will talk to you about its control methods. Since the pest period of fruit flies is when the bayberry is ripe, it is necessary to use chemical drugs carefully and try not to use chemical agents to avoid pesticide residues exceeding the standard.
< h1 class = "pgc-h-arrow-right" > past and present lives of the bayberry fruit fly</h1>
There are 6 species of fruit flies that harm bayberry, namely drosophila black-bellied fruit fly, drosophila takahashi, drosophila, pasteuris fruit fly and Imi fruit fly. Among them, the fruit flies that harm bayberry in the field are mainly black-bellied fruit flies, which usually account for more than 95%. This fruit fly can breed a generation in ten days, overlapping generations, they can be seen all year round, the larvae only need 2 days from egg to normal form, adults like to be active in the early morning or dusk, resting at night.
If the humidity of the orchard is large and the closure is high, the situation of fruit flies will be more serious. When the bayberry begins to change color, the nearby fruit flies will migrate to the bayberry garden, such as melon fields, vegetable fields, etc., and when the bayberry maturity reaches 9-10 maturity, the number of insect mouths of the bayberry will be more. Due to the small size of the flies, they lay smaller eggs, which are usually hidden between the columns of fruit flesh, which are difficult to detect with the naked eye, and after the eggs hatch, the larvae will feed directly on the flesh. Over time, the bayberry will rot and fall, and the yield and quality will plummet.
<h1 class = "pgc-h-arrow-right" > food attractants – sweet traps for fruit flies</h1>
We compared the effects of swatches in booby-traping fruit flies, sexual attractants, and food traps to kill fruit flies, and verified that the phototropism of fruit flies is not strong, unlike aphids or thrips who see the color plates like moths fighting fires and killing themselves. Fruit flies are also not interested in the opposite sex, but they are genuine "foodies" and have a tendency to taste food. In view of this characteristic, it is recommended that you use the method of food attractants to trap fruit flies, the formula is 5% rice vinegar + 5% brown sugar + 1% flavor + 0.01% methyl vitamin salt granules, first dissolve the brown sugar and methyl vitamin salt and then mix. This recipe is sweet and sour, and it is very appetizing to fruit flies, and after attracting them, it kills them by the ingredient of methylene salt. Methylphenidate is a new type of antibiotic insecticide, belongs to the biological pesticide, not only has gastric toxicity, but also touch killing effect, insecticidal spectrum is wide, insecticidal activity is 1000 times higher than avermectin, so that it is efficient, low toxicity, low residue, pollution-free.
Such traps are relatively simple to make and can be made from mineral water bottles. In the distance from the bottle mouth 1/3 with a knife to dig 4 square holes, the size of 2 cm× 2 cm or so, requiring the symmetrical distribution of the holes, pay attention to only cut left and right and below, keep the top, and then lift the small square to make a bottle ear, so that it is convenient to replenish the liquid medicine and block the rain. Add the potion to the bottle, each bottle contains about 200 grams, and add some small branches to the bottle to facilitate the feeding of fruit flies, and hang it on a string or wire to the tree. It is recommended to clean up the bugs once a week and change the solution. If you do not have enough mineral water bottles, you can also use potted liquid, but you can't stop the rain on rainy days. Each pot contains 1 kg of liquid medicine, and 20 pots per acre. You can also buy a sweet and sour liquid trap produced by the manufacturer on the market. According to the density of the insect population, usually every 3 trees can be hung, pay attention to hanging on the leeward branches, if conditions permit, it is best to hang one per tree.
Of course, you can also buy a special fruit fly trap for bayberry, dilute 3 times before spraying, set a point every 6 meters, spray on the leaves in the shade of the fruit tree, the range is 0.5 square meters, the dosage is that the leaves have drops of booby traps but do not flow down, use 180 ml per acre.
<h1 class = "pgc-h-arrow-right" > biological agent - avoid adults and kill larvae</h1>
The biological agents that can be used are 0.3% neem emulsion 300-500 times liquid, 2.5% polybactericide suspension 1000-1500 times liquid, 0. 5% ivermectin emulsion 750-500 times liquid and 1% matrine soluble liquid 1000-1500 times liquid, etc.
Neem
0.3% neem emulsion is obtained from the national organic agriculture certification certificate of the agent, neem can make insects refuse to eat, avoid and inhibit the growth and development of insects, can kill most pests, but no harm to warm-blooded animals, that is, it is safe for humans. 300-500 times liquid of 0.3% neem emulsion can be used before the occurrence or initial stage of Drosophila larvae.
Polybactericide toxicity is low, fast-acting, long effective period, safety interval is relatively short, only 1-3 days, can be sprayed once a drug 8 days before the picking of bayberry, the concentration of 60 grams per liter of ethyl polybactericide suspension 1500-2000 times liquid, the drug penetrates, the leaves and fruits of bayberry are sprayed wet, it is recommended to control during the occurrence of fruit fly larvae.
Compared with ivermectin, you may be more familiar with avermectin. In fact, the relationship between ivermectin and avermectin is very close, ivermectin is a product obtained after the reduction of avermectin as a lead compound, retaining the insecticidal and mite activities, but the toxicity to lactation agents is greatly reduced. About half a month before the bayberry picking can be sprayed 0. 5% ivermectin emulsion 750-500 times liquid, pay attention to spray evenly, wet the entire plant to ensure effectiveness.
Whether it is a food attractant or a biological agent, it is aimed at after-the-fact prevention and control, but the effect is good, the cost is low or a preventive measure. It is recommended to start after the beginning of spring, to improve the environment of the orchard, and to spray insecticides near the orchard to avoid the migration of fruit flies. Before the bayberry is hung, the straw piles and farm manure in the orchard are disposed of. Clear out the orchard weeds before the bayberry turns color. It is necessary to clean up the fallen fruit in time, including the physiological fruit fall and the fallen fruit during the ripe harvest period, send it out of the garden for centralized treatment, spray 40.7% chlorpyrifos emulsion 500 times liquid and then bury it deeply.
<h1 class="pgc-h-arrow-right" > summary</h1>
The formula of the food attractant is 5% rice vinegar + 5% brown sugar + 1% flavor + 0.01% methyl vitamin salt granules, and the biological agents that can be used are 0.3% neem emulsion 300-500 times liquid, 2.5% polybactericide suspension 1000-1500 times liquid, 0. 5% ivermectin emulsion 750-500 times liquid and 1% matrine soluble liquid 1000-1500 times liquid, etc.