Prevention and control of litchi pests and diseases after typhoon

After the typhoon, the prevention and control of litchi pests and diseases, Hainan's litchi is in the first autumn shoots extracted after picking fruit or in the second autumn shoot, Guangdong and Guangxi are mostly pumping the first autumn shoots. Super typhoons caused some branches to break and a large number of leaves to break, and even the whole tree was scraped or scraped. In order to restore the tree as soon as possible, cultivate a strong and healthy autumn shoots, and do a good job in the prevention and control of pests and diseases, put forward the following suggestions:

Moderately correct and cultivate the soil. Litchi trees that have been blown down by the wind should be timely and properly adjusted and soiled, and conditionally added to the bracket to protect the wind from shaking.

Strengthen the management of fertilizer and water, properly apply a quick-acting fertilizer, supplement the organic nutrients on the foliage, and accelerate the recovery of the tree.

Eliminate stagnant water and clear garden in time. Grab the time to dig through the ditch and drain the water in the orchard to prevent the roots from being immersed in water for a long time; cut off the seriously damaged main branches in time, and trim the severely damaged branches to promote new shoots.

Prevent and control the occurrence of pests and diseases. Spray the fungicide in time to prevent the occurrence of fungal diseases such as anthrax due to a large number of wounds. It is recommended to apply the agent: prochloraz (Shi Bao Ke), prochloraz manganese salt (Shi Bao Gong), azoxystrobin (Amisida) , difenoconazole (Shigao), thiophanate-methyl, carbendazim, mancozeb (poke) and virulence, etc. (use concentration reference product specification).

At the same time, we should pay close attention to the occurrence of a variety of leaf-eating pests, especially to strengthen the control of the litchi and the leaf-rolling moth. According to the new shoots of the orchard, we can choose the sputum scorpion nucleopolyhedrovirus (BsSNPV), Bt, and chlorfenapyr. , avermectin, emamectin benzoate and chlorantraniliprole (use the concentration reference commodity instructions); in order to promote the growth of branches and leaves, can be mixed spray leaf fertilizer.

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