What pesticide is effective for controlling the pagoda tree looper (Sophora japonica looper)?

Sophora japonica (Sophora japonica) has relatively strong pollution resistance and good greening effects, and is one of the main tree species for landscaping. However, Sophora japonica is often harmed by the Sophora japonica looper during cultivation. When it occurs severely, it often eats all the leaves of an entire tree within 1 week and spins silk and excretes frass, seriously affecting the growth and development of Sophora japonica. So what pesticide should be used for the Sophora japonica looper?

Before the larvae reach the 4th instar, pay close attention to whether there are scattered spots of feeding damage on the leaves at the top and edges of the crown. If there are, it indicates that the average leaf damage rate exceeds 5%, and at this time spraying equipment should be prepared and spraying should begin for control. You can use 20% triflumuron No. 3 at 1000 times dilution, or 40% highly permeable omethoate at 1000 times dilution, or 20% fenvalerate-killing emulsifiable concentrate at 4000 times dilution, or 50% phoxim emulsifiable concentrate at 2000--3000 times dilution, or 50% fenitrothion emulsifiable concentrate at 1500~2000 times dilution for spray poisoning of the larvae. When spraying, try to spray evenly. For underground larvae, use 2.5% trichlorfon powder or 3% dimethoate powder for ground dusting. After the older larvae mature is the most favorable time to control the Sophora japonica looper; before the mature larvae enter the soil, they can be swept up and concentrated for killing. Or combined with autumn loosening of the soil, look for pupae in the 2 cm thick soil layer and concentrate treatment to reduce the pest source and lower the damage the following year. You can also spread 5% zinc-phoxim granules at 3~5 g/sq m on the soil surface under the tree, and shallow hoe once so that the pesticide granules enter the soil layer to kill the pupae. For isolated trees or areas not suitable for spraying, injection can be used, injecting 40% monocrotophos for control, with good results.