What medicine does Robinia pseudoacacia inchworm use?

Robinia pseudoacacia has strong anti-pollution and good greening effect, so it is one of the main tree species of landscaping. However, Robinia pseudoacacia is often harmed by acacia inchworm in cultivation. When it occurs seriously, it often eats all the leaves of the whole tree within a week, spits out silk and defecates, which seriously affects the growth and development of Robinia pseudoacacia. So what kind of medicine does Locust inchworm use?

Before the 4th instar, the larvae should pay close attention to whether the leaves at the top and edge of the crown have been eaten sporadically. If so, it indicates that the average damage rate of leaves is more than 5%. At this time, spraying equipment should be prepared and spray prevention and control should be started. The larvae can be sprayed with 1000 times of 20% thiazuron 3, 1000 times of hyperosmotic omethoate, 4000 times of 20% chrysanthemum EC, 2000 times of phoxim EC, or 1500 times of 50% fenitrothion EC. Strive to spray evenly when spraying. For underground larvae, 2.5% trichlorfon powder and 3% dimethoate powder were sprayed on the ground. The mature old larvae are the most favorable time to control the inchworm of Robinia pseudoacacia, which can be cleaned and killed before the mature larvae enter the soil. Or combined with loosening the soil in autumn, looking for pupae in the thick soil layer of 2cm, centralized treatment, in order to reduce the source of insects and reduce the harm of the following year. 5% zinc parathion granule 3~5g/ powder can also be sprinkled on the surface of the soil under the tree, and shallow hoe once, so that the pesticide particles enter the soil layer to kill insect pupae. Solitary tree planting or areas that are not suitable for spraying can be treated by injection of 40% monocrotophos, and the effect is better.