Planning and doing work at the right time will never make you late to spray for Bagworms. For this, you have to know when the Bagworms arrive and hatches their eggs. ( If you want to know about this, please visit our website to learn more)
We must keep trees safe from defoliation. So you can start to spray insecticides from the last of May and the beginning of June. However, if you do not start quickly, it will be difficult to remove them if they begin to spread in different areas.