Prevention and control methods of daylily diseases and pests

Prevention and control methods of daylily diseases and pests

Rust

Before the disease occurs, 500 times the solution of Zineb needs to be sprayed; in the early stage of the disease, 300 times the solution of sodium dichlorvos needs to be sprayed. Starting from late March every year, spray once every ten days, and spray continuously for 3-4 times. After autumn, collect the diseased remains and burn them.

Scarab

The main beetles that harm daylilies are the blue beetle and the white-spotted beetle, which can be killed manually. During the peak period of adult occurrence, spray 1000 times the solution of 40% oxydemeton-methyl emulsion, or soak fresh plantain and add water and spray 5 times the solution. You can also use the tendency to lure and kill white-spotted beetles.

Leaf blight

At the early stage of the disease, spray 600 times the solution of 65% Zineb or 1000 times the solution of 70% Thiophanate.

anthrax

Cut off diseased leaves and destroy them promptly, and completely remove diseased and dead branches in late autumn and early winter; pay attention to reasonable fertilization, and do not apply nitrogen fertilizer excessively; pay attention to ventilation and light, and prevent high temperature and humidity; spray 800-1000 times diluted 70% thiophanate before or in the early stage of the disease to prevent disease.