What are the technical solutions for the prevention and control of small fruit flies?

1 Raise chickens to get rid of insects. Taking advantage of the characteristics of the mature larvae jumping into the topsoil from the fallen fruit to pupate, the conditional orchard chickens feed on the orange fruit fly pupae in the topsoil, and can also peck at the orange fruit fly larvae in the fallen fruit. During the stocking period, the orchard should pay attention to the safe use of medicine.

2 Artificially release parasitic wasps. In ecologically sound orchards, natural enemies can be released. Generally, the base number of orange fruit flies in orchards is depressed first, and then according to field monitoring, parasitic wasps of different insect states such as egg parasitic wasps, larval parasitic wasps, and pupal parasitic wasps are selected for release, and the release amount of parasitic wasps is determined according to the number of orange fruit fly populations in the field.

The bee release should be selected in the weather with a temperature of 22 or more, sunny and a wind force of less than level 3, between 10:00 and 16:00.

First, conventional methods of prevention and control. The eggs can be disposed of through orchard turning, orchard cleaning, and fruit bagging. Second, chemical prevention and control.

It can be dewormed with insecticides. Third, physical methods of prevention and control. Install insect traps, insecticidal lights.

After such a situation, it is necessary to water in time, and it is necessary to fertilize in time, and then it is also necessary to spray some pesticides in time, and it is necessary to pay attention to the density of planting, and then the planting temperature should also be guaranteed.

The small fruit fly of orange is also called the small fruit fly of citrus, the fruit fly of the oriental fruit fly, etc., and is a pest of the fruit fly family. Originated in Indonesia and Malaysia, it has been introduced to our country since 1937. Known as the "number one killer" of fruits.

Prevention and control methods. 1) Physical control of methyl bromide fumigation, treated with 35 grams per cubic meter of methyl bromide for 3 hours, or 30 grams per cubic meter for 3 hours under 29 conditions.

2) Chemical control 50 grams of 90% trichlorfon per 667 m2, 50 kg of water, plus 30 grams of brown sugar, spray once every 15 days or so, 3 4 times in a row. Spray 10 grams of afudin per 667 m2 with 30 40 kg of water, with an interval of 1 week, sprayed 5 times.

3) Agricultural control: Avoid arranging fruits at different ripening stages in the same orchard. Fruit bagging. Harvest early. Collect rotten fruits in the field, remove the damaged fruits and mature fruits in a timely manner, and bury them more than 45 cm deep.

(1) Agricultural prevention and control.

Treat the stalks of the host crop before winter to suppress the overwintering insect population.

2) Lamp traps adults.

In the peak period of each generation of adults, light a black light to trap and kill adults.

3) Chemical control.

In vegetable sweet corn, the end of the heart leaf is the appropriate period for control, and the mosaic plant rate is more than 25%, that is, the control should be carried out, and it is best to fill the core with the agent or apply the granule to the bell mouth. Pesticides can be selected 800 1000 times of Bacillus thuringiensis (BT) powder, 3000 3500 times of 20% pyrethroid EC, 2000 times of cyhalothrin microemulsion, and 1000 times of 48% chlorpyrifos EC.

Adult males are trapped, using special attractants and trapsIt can trap and kill a large number of male adults and reduce the number of eggs laid by male and female mating, and reduce the source of insects in time.

Traps (it is recommended to use special traps produced by Ruifeng Biology) are evenly placed 5 per mu, and sexual attractants are put into each trap to trap males, and sexual attractants (Ruifeng Bio long-acting sexual attractants are recommended) are added every 20-25 days.

The fallen fruit of the damaged orchard (vegetable garden) should be removed in time, and the treatment method can be deep burial, water immersion, incineration, scalding, etc. to kill the larvae in the fruit.

Adults have obvious phototaxis, the optimal temperature for development is 25-30 degrees Celsius, adults feed on nectar, dew, rotting fruits, etc., have a life period of 1-2 months, the migration distance of 2-3 kilometers on the road male and female fruit flies can mate many times, female fruit flies lay eggs in different parts of the fruit, it can lay about 1000 effective eggs in the adult period of 1-2 months.

The eggs are laid on the outer skin of the fruit or at the wound of the injured fruit, and the eggs hatch after 24 hours. After the larvae hatch, the larvae burrow into the pulp to feed, and after two peels, the mature larvae have a strong jumping ability after 6-10 days, and jump into the soil to pupate.

Pupae can emerge after 6-10 days, and moist soil is conducive to fruit fly emergence.

Citrus fruit fly is a domestic and international plant quarantine object, in our county occurs a generation of a generation, with larvae in the fruit harm, resulting in fruit ulceration and fruit drop, seriously affecting citrus production, quality and sales. According to the life history of the large fruit fly and the characteristics of simple citrus and pomelo, it is necessary to adopt the comprehensive control measures of "luring, picking, picking, digging and cutting" in the control technology, and the group prevention and treatment.

1. From mid-May to late June, sweet and sour liquid is used to trap and kill adults, and the adults are eliminated before they are laid eggs. The first is the spray method: with 100 grams of high defense or (100 grams of 90% crystal trichlorfon) plus 3 kg of brown sugar mixed with 100 kg of water, spray one-third of the trees in the whole garden, spray one-third of the crown of each tree, once every 5-7 days, spray 3-4 times.

The second is the hanging bowl method: with 100 grams of high defense or (100 grams of 90% crystal trichlorfon) plus 5 kg of brown sugar + 1 kg of liquor + vinegar kg, mixed with 100 kg of water, divided into 3-4 mouths (4cm wide, 10 cm long) of bamboo tubes or fresh orange bottles, put a few dry branches on the surface of the medicine, hang on the orange tree, high meters from the ground, hang 8-10 per mu, and replace the booby trap liquid every 7-10 days.

2. From September to November, the masses were mobilized to remove the insects and fruits with oviposition scars, pick up the fallen fruits on the ground, dig a 1-meter-deep soil pit, pour the insects into the pit, sprinkle a layer of lime and then cover them with soil and press them tightly.

3. Plough the orange orchard in spring and winter, and remove Xerosburn from the soil surface to eliminate overwintering insect pupa.

Fourth, for orange trees with small economic value and heavy insect feelings, measures such as picking green fruits as medicinal materials, cutting down trees or high grafting and replanting are adopted.

5. Strengthen quarantine. Strict quarantine is the key to controlling the spread of this pest, and it is strictly forbidden to transport orange fruits and seedlings in epidemic areas at will.

The citrus fruit fly occurs in the Qingjiang crane sojourn every year. Fly pupa overwinters in the soil, and after emergence, in April and May of the following year, the adults pierce the citrus peel with an ovipositor and lay eggs under the cortex. The adults turn the soil deep before they emerge in the soil layer, destroying the process of shakutsa feathering.

Citrus fruit flies, needle bees will make citrus appear in the "fruit maggot", "fruit maggots" serious, will bring great losses to fruit farmers, so how to control the big fruit fly, I personally think from how to control adults, pupae, larvae three aspects can start.

In winter, the eggs of the fruit fly are hidden in the soil for wintering, and at this time, the soil under the fruit tree and the place where the maggot fruit falls in previous years can freeze a batch of eggs. In April, the weather gradually warms up, the eggs are slowly moving to the ground, ready to feather, at this time, chlorpyrifos mixed with fine sand, fine soil, sprinkled under the canopy and maggot fruit drop place, shallow turning the soil, can poison a batch of eggs.

The adult body of Citrus fruit fly is 13 mm long, yellowish-brown, compound eyes are golden-green, and the middle of the dorsal plate of the mesothorax is a "human" chevron brown marking. The wings are hyaline, the oves are tubular and consist of 3 segments. The larvae are 15-19 mm long, maggot-shaped, milky white.

The prevention and control methods are divided into: agricultural prevention and control, one is to bury and burn the yellow fruit that has been damaged by the larvae and the insect fruits that fall under the tree, and completely eliminate the eggs and larvae. The second is to destroy the wintering place of the pupae and affect the emergence of adults in winter and spring by turning over the shishi, destroying the overwintering place of the pupae.

Citrus fruit fly is one of the important insect pests that pest citrus, and since the beginning of the 60s and 70s of the 20th century, the occurrence of nuclear attacks has been increasing year by year. Especially in Hunan, Hubei, Guizhou, Chongqing, Sichuan and other citrus producing areas, the harm is particularly serious. In the place where there are fewer citrus fruit trees and the citrus fruit fly is the most serious, all the young fruits that are not ripe are removed in July and August, and then they are deeply buried, burned, soaked and other methods to treat, so that the larvae in the young fruits can not continue to develop and kill, so that they are broken.

This is a fruit fly, and there are two kinds of flies.

1. Small orange fruit fly.

The small fruit fly is a devastating pest of fruits and vegetables, harming more than 250 species of fruits and vegetables in more than 40 families. Adults lay eggs in fresh fruits, and the larvae swarm in the fruit to feed, causing the fruit to rot and yellow before ripeness, resulting in a large number of fruit drops, and the old mature larvae enter the soil to pupate. 3 to 9 generations occur in a year, there is no strict overwintering process, and the generations overlap.

2. Citrus fruit fly.

The host of the citrus fruit fly is limited to citrus, and the adult worm lays eggs in the young citrus fruits, and there are small needle holes in the oviposition, which resemble a crater indentation. One generation occurs a year, and the pupae overwinter in the soil.

It was unearthed from April to May of the following year, and reached its peak in mid to late May. The newly feathered adults do not feed, and within one week, they fly to the green forests and bamboo forests near the orange orchard to feed on aphids, honeydew and dew. The adult active period can last until the end of August, and they are nocturnal and nocturnal, preferring to stop the back of the leaves, and are agile in the middle of the day to evening on sunny days.

After about 20 days of eclosion, it flies to the orchard to mate and lay eggs, and the spawning period is 6 to 7 months, and the eggs are laid in the young citrus fruits.

The first half of September is the peak incubation period. After hatching, the larvae eat the pulp in the fruit, which is yellow before ripening, forming maggots and falling fruit in advance. Mature larvae pupate and overwinter.

Prevention and control methods. 1. Strengthen popular science education, and find maggots to be exterminated in time, and do not throw maggots on the side of the road or in streams and rivers; Remove the insects and overripe fruits on the trees in a timely manner, pick up the fallen fruits, and dispose of the insects and fruits in a timely manner by soaking and incineration; In winter, the garden is cleared and ploughed to kill the overwintering pupa.

2. In the peak period of adult mating and oviposition, hang bottles, spot spray or strip spray to trap, and the bait can be commercial bait or homemade brown sugar poison bait, protein poison bait, etc.; For orchards with serious occurrences, pesticides such as pyrethroid can be sprayed on the dense part of the canopy during the active period of adult oviposition, and sprayed more than 2 times.

In the peak stage of adult eugenation and oviposition, the plants are sprayed with chemical agents (40% Yakinosta, 80% dichlorvos or 90% trichlorfon) and mildew bait, and the pesticides are used to kill the adult insects.

Spraying the canopy every 5-8 days for 1 month can also have a certain control effect. The most important thing in chemical control is to grasp two points: the screening of chemical agents, according to the behavioral and biological characteristics of the large fruit fly of Xiangtang, select the most suitable period for the prevention and control of pesticides, so that the control effect can achieve the best effect.

The adults of citrus fruit fly have a strong ability to migrate in close proximity, and the control effect of spraying chemicals is not ideal, and the chemical control technology is not suitable for large-scale pest control. In the actual operation of the control of citrus fruit fly in orange orchards, most of the methods of spraying plants are used to achieve the purpose of killing the adults of citrus fruit fly.

Strict quarantine. In accordance with the People's Republic of China's "Plant Quarantine Regulations", strictly prevent the introduction of insects into non-epidemic areas.

Bagging insect protection. Pick the insect fruit. Once the fruit with damage symptoms is found, it should be picked in time and burned in a centralized manner, and the fruit of the ground insect is no exception.

Deep ploughing in winter to kill insect pupa.

Pharmaceutical prevention and control. In early and mid-May, spray the ground with 50% octathion emulsifiable concentrate 500 800 times in the peak period of adult emergence, and in the peak of oviposition from late July to early August, choose 800 times of 80% dichlorvos emulsifiable concentrate and 2000-4000 times of pyrethroid insecticides such as 20% emulsifiable concentrate, plus 3% brown sugar solution to spray the canopy, spray 1 time every 5 10 days, and spray 3 4 times in a row.

The fruit fly protein bait produced by Zhangzhou Longdebao Biotechnology can trap male and female fruit flies at the same time, and the biological products are environmentally friendly, pollution-free and residue-free.