The invention belongs to the technical field of pest and
disease control, and discloses a prevention and control method of
panonychus ulmi and application. The prevention and control method includes the steps that after the number of
panonychus ulmi of all leaves is recorded through field investigation of the
panonychus ulmi, the average each-leaf panonychus ulmi amount is calculated, meanwhile, the panonychus ulmi-leaf rate is investigated, and the proportion of the leaves where the panonychus ulmi survives is calculated; based on a field investigation result, a relationship model of the panonychus ulmi-leaf rate, the average each-leaf panonychus ulmi amount and the field damage level is established; and the prevention and
control effect of common
acaricide is evaluated and actual prevention and control indexes are verified through field
efficacy tests. By recording the number of panonychus ulmi on all leaves, the average each-leaf panonychus ulmi amount is calculated, meanwhile, thepanonychus ulmi-leaf rate is investigated, the proporton of tree leaves where the panonychus ulmi survives is calculated, the investigation
workload is greatly reduced, a relation model of the panonychus ulmi-leaf rate, the average each-leaf panonychus ulmi amount and the field damage level is established on the basis of a large number of investigation results, actual
verification is conducted through a field
pesticide effect test, scientificity and the practicability of simplified prevention and control indexes of the panonychus ulmi are ensured, and the prevention and
control period of the panonychus ulmi can be rapidly, simply and conveniently determined.