What are the control methods for the yellow nettle caterpillar on magnolia?
(1) In summer (1-generation areas) and in winter and spring (1-2 generation areas), in combination with pruning and other field operations, cut off or pick off the cocoons. (2) When young larvae are clustered and causing damage, cut off the infested leaves to kill the larvae. (3) Spray 20% diflubenzuron suspending agent or 20% chlorbenzuron No. 3 suspending agent at the young larval stage, or spray Bt emulsion, Bacillus thuringiensis, etc. throughout the larval stage. (4) When necessary, spray insecticides such as fenpropathrin, phoxim, fenitrothion, etc. during the larval stage.
(1) In summer (1-generation areas) and in winter and spring (1-2 generation areas), in combination with pruning and other field operations, cut off or pick off the cocoons.
(2) When young larvae are clustered and causing damage, cut off the infested leaves to kill the larvae.
(3) Spray 20% diflubenzuron suspending agent or 20% chlorbenzuron No. 3 suspending agent at the young larval stage, or spray Bt emulsion, Bacillus thuringiensis, etc. throughout the larval stage.
(4) When necessary, spray insecticides such as fenpropathrin, phoxim, fenitrothion, etc. during the larval stage.