Before you read this article, you can click "Follow" in the top right, and then you can receive free content pushed by "Tinder Sannong" every day. Thank you for your interest!
This insect is the fruit fly, which is a common name for the diptera non-petaled fruit fly family, there are about 4,000 species in the world and about 400 species in China. Fruit flies are plant-eating insects, larvae have latent feeding, often sneak into the fruit inside the harm, so that the fruit is not ripe before yellow, fall off in advance, decay; can also endanger plant roots, stems, leaves, flowers and other parts, of which the fruit of the fruit caused by the most serious losses.
The fruit flies found in China are mainly harmful to fruits and vegetables such as citrus, pears, and melons. In particular, the citrus fruit fly, which has a large area and heavy damage losses, has become the first major pest in citrus production, and will bring huge losses to citrus growers every year.
Citrus fruit fly has a large and small; citrus fruit fly commonly known as "citrus maggot", also known as orange big fruit fly, mainly harmful to citrus, sweet orange, golden orange suffer the most, the victim fruit is called "maggot fruit", "maggot". Citrus small fruit fly, also known as "fruit maggot", oriental small fruit fly, its diet is mixed, in addition to harming citrus, but also can harm the fruits of guava, star fruit, loquat, peach, soursop and other fruit trees.
The female of the fruit fly lays eggs under the peel, laying 5-15 eggs at each place, and each female flies lay up to about 400 eggs, and the fruit produces needle eyes. After the eggs hatch, the larvae feed on the flesh of the fruit and grow, and the affected part of the fruit turns brown, the surrounding area turns yellow, rots, and falls off. After the larvae mature, they go out of the fruit and merge into the soil to pupate, and the adults feather out in the soil.
Citrus fruit flies have strong reproductive ability and short development periods, and once they break out, they will cause serious harm to orchards. However, due to the fact that the larvae are infested in the early stage of the fruit, they are hidden and difficult to attract attention, thus ignoring and missing the best period for control.
In terms of production, the prevention and control of citrus flies is mainly based on the occurrence of fruit flies to take targeted comprehensive control measures. The core of the comprehensive prevention and control technology of citrus fruit flies is "to do a good job of four passes".
First, the ground is sealed off, in the peak period of real fly feathering (generally in early and mid-May), spray insecticides such as chlorpyrifos, octylthion, and permethrin on the ground in the citrus canopy with a large amount of fruit fall, and poison the adults unearthed by feathering; when adults enter the garden to lay eggs, spray the orangery canopy with cypermethrin or permethrin + brown sugar liquid, once in 7 to 10 days, 2 to 3 times in a row.
The second is canopy booby traps, generally in the adult bloom period (late May to early July).
(1) Yellow plate booby trap. Taking advantage of the yellowing nature of the real fly, the yellow sticky plate is hung to trap the adult insects, and the female and male adults can be trapped.
(2) Hanging bottle booby trap. Can be used chlorpyrifos or octylthion and other agents + brown sugar + vinegar + water, according to the ratio of 0.1: 3: 0.1: 1: 100, formulated into a sweet and sour liquid, from the end of May to hang bottles on the tree booby trap; a small amount of liquor or orange juice added to the liquid can improve the booby trap effect, 20 booby trap bottles per acre, every 5-7 days need to change 1 booby trap, rain also need to be replaced in time; you can also choose a special trap.
(3) Spray booby-trap: Select a booby trap for canopy spray booby-trap, select one-third of the tree in the orchard as a booby-trap tree, spray on the back of the leaf at about 9 a.m., spray one-third of the canopy per plant; also from the end of May, spray once every 7-10 days, spray 3-5 times.
The third is to remove the insect fruit; from mid-to-late August to late November, after the maggots fall to the ground, the old mature larvae inside crawl out and burrow into the soil to pupate, and become the source of the citrus fly in the second year. Organize orange farmers once every 2-3 days, remove the unripe and yellow insect fruits, pick up the ground fruits and take them out of the orange garden, carry out centralized deep burial treatment, or throw them in the feed mouth of the biogas pond to kill the larvae, or directly throw the insect fruits into the fish pond to feed the fish. The removal of the unripe first yellow worm fruit not only preserves the control results of that year, prohibits the old mature larvae from entering the soil, and lays a good foundation for next year's control.
The fourth is to plough and eliminate pupae; when pruning the garden in winter, plough the soil layer as deep as 10-15 cm in the whole garden to eliminate the wintering pupae lurking in the cultivated layer.