How to control Robinia pseudoacacia seed wasp?
The methods to control the seed wasps of Robinia pseudoacacia are as follows: first, the seed quarantine should be strict, and the outward transportation of seeds with insects is strictly prohibited. Second, strengthen the management of mother trees and find the use of chemicals to control pests. Fumigation with 741 dichlorvos intubation fumigant during adult emergence. Spray with 80% dichlorvos EC 8 to 1000 times, 40% dimethoate EC 1000 to 1500 times, or 20% butyl EC 1500 times. Third, soaking the seeds in hot water (60 degrees Celsius) for 15 minutes can kill the intraspecific larvae, or select the seeds with 10% to 20% salt water.
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Picking the heart can make Robinia pseudoacacia bloom many times.
Hairy Robinia pseudoacacia, also known as Jiangnan Robinia pseudoacacia, blooms only one crop of flowers a year under natural growth conditions. A large amount of nutrition is used for shoot growth, which can grow up to more than one meter. When summer comes, the strong wind can blow the growth direction of the twigs, forming a partial crown phenomenon. It not only reduces the ornamental property of Robinia pseudoacacia, but also increases the workload of winter pruning. In winter pruning, many branches that have grown for a year are cut off or truncated as useless branches, and short branches will continue to grow in vain the following year. Using the new shoots of Robinia pseudoacacia to grow many times.
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How to control Robinia pseudoacacia seed wheat moth?
The methods to control the wheat moth of Robinia pseudoacacia seeds are as follows: first, remove the remaining pod horn after defoliation and eliminate the overwintering larvae. Second, during the peak period, 50% fenitrothion EC can be sprayed 1000 to 1500 times, or 40% dimethoate EC 800 to 1000 times. Third, protect and utilize natural enemies. Fourth, select the seeds with 20% salt water before sowing, float up and remove the insect seeds and burn them.
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