Litchi longan autumn shoot pest control

August 06, 2019

In recent years, the area of ​​young orchards litchi or longan has been continuously increasing, but for the first-time production of trees and the young trees of young adults, it is necessary to cultivate timely autumn shoots so that two autumn shoots are suitable, and some of the fertilizers can be given three times. The trees affected by frost damage last winter also had two autumn shoots in order to avoid the winter shoots. The more shoots, it means that the food chain extension of pests increases the workload of pest prevention and control, and in August-October, high temperature is accompanied by drought, which is the high incidence of various pests. Therefore, we should pay attention to it, effectively prevent and control pests during the fall shoots, and protect new shoots.
Litchi, longan shoots of new leaf pests are: litchi locusts, leaf roller moths, sharp moths, hairy moths, ulnar maggots; suck young shoots (buds) young leaf sap: litchi, longan, pupa, White moth wax beak (also known as green-winged plumage, white chicken) and so on.
The best way to combat diseases and diseases in litchi and longan autumn shoots is to implement comprehensive prevention and control: 1. Strengthen fertilizer and water management, maintain strong tree vigor, increase resistance to pests and diseases, and especially provide sufficient fertilizer and water, and urge each new shoot to be drawn out neatly. Conducive to chemical control. 2, reasonable pruning. Timely cut off the vaginal branches, branches and branches, and dense branches, so that the canopy has good permeability and reduce the source of pathogens. 3, protect natural enemies of pests. The first is the autumn shoot growth period, which encourages orchard weeding and grass removal (except for the tree tray) to provide sheltering places for pests and natural enemies. Second, no pesticides are abused. Some drugs are used repeatedly and the natural enemies of pests are almost extinct, destroying ecological (population) balance. As a result, there are more pests with more spraying times. 4, timely put autumn shoots. 5, pharmaceutical control is an important part of comprehensive prevention and control, when the chemical control, first of all to measure the larvae incubation period; grasp the important control targets; select the appropriate pesticides, the right medicine, the concentration should be appropriate, application of pesticides should be timely.
New leaf-feeding pests: peduncles, leaf roller moths, tipping moths, derrick moths, ulnar moths, etc. The following agents can be used: (1) 90% trichlorfon 1:800 times; (2) 25% dimehypox 1: 500 times; (3) 30% killing 1:1500 times. Draw shoots from autumn shoots. Pests: Prunus cerasifera, Long-eye clams, White moth wax cockroaches, Thrips horses, Scale insects, Longan corneas, etc. The following agents may be selected: (1) Dioxin 1:800 times; (2) 407% Losby 1:1000 times; (3) 10% Xing Lvbao 4000 times + 3000 times.

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