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Prevention is at the time! This pest has caused citrus growers to go bankrupt
2019/7/25 10:30:48

Every time the citrus is on the market, there will always be news of some citrus long locusts, which can be said to be disgusting to the eaters.

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When it comes to Tetradacus citri, the ultimate victim is a fruit grower. Why do you say that?

 

First, Tetradacus citri is the larva of the citrus fruit fly, and it can only be described as devastating. When larvae eat citrus fruits, they will cause a lot of fruit drop. After the fruit is damaged, it will completely lose its commercial value, and it will not be edible and sold, and the loss will be huge.


Second, the Tetradacus citri found in the market is only a minority, but a large number of reports have infinitely magnified the negative impact, seriously damaging the purchasing enthusiasm of consumers, resulting in a large amount of citrus unsalable, and the loss of fruit farmers has further expanded. In severe cases, it may even affect The benign development of the entire citrus industry.

 

From this point of view, to solve the problem of Tetradacus citri, it is still necessary to grab the source and do a good job in the prevention and control of citrus fruit fly. The big fruit fly that looks over the winter is about to be unearthed. How do you do it?


The life of the citrus fruit fly has to go through four periods of eggs, larvae, pupae and adults, and it is complete metamorphosis.


The citrus fruit fly only harms citrus, and suffers from lime and sweet orange. Citrus red orange is the second, and occasionally it harms lemon, citron and bergamot. The larvae wear licking petals inside the fruit, often making the fruit unripe and yellow, and early fruit drop, which seriously affects citrus yield.


The fruit that has not fallen off after the damage contains a large number of aphids. The inside of the damaged fruit usually has 5 to 10 heads of citrus, and more than 100 heads. It is called "fruit". The flesh rots, stinks, and completely loses its edible value. The selective preference for the spawning of Drosophila melanogaster to different host plants was navel orange > miso mandarin > tangerine.

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Green ecological biochemical control:

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①Prevention: In the larval stage and the unearthed period, the ground is sprayed with the entomopathogenic fungal preparation, and the Beauveria bassiana is better, killing the larvae and the unearthed adults. Use a mineral source agent such as stone sulphur mixture or mineral oil to carry out a comprehensive clearing of the orchard, spray once every 7 days, and spray 2-3 times to kill larvae and eggs.


②preventive treatment: before the large number of fruit flies emerged in April, the number of insect populations was low. The above physical methods were used to trap adult and biological predators, combined with plant-derived bio-pesticides such as abamectin and pyrethrin, for 7-10 days. Control the number of insects to expand, preventing adults from laying eggs. In particular, it is important to spray it about one month before harvesting to ensure that the citrus is green, healthy and safe without the risk of pesticide damage.


③Outbreak control: When the fruit fly of the orchard breaks out, when there are many insects, use chemical reagents such as Chlorpyrifos and Cyromazine to reduce the number of insects, and then cooperate with physical and biological control methods to control the control of biological pesticides to reduce the amount of chemical used and reduce the chemical. Pesticide residues.


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