Today, we've summarized some common pest and disease control methods for nursery owners in spring, hoping to help you with pest and disease prevention for your seedlings this spring.

Main damage: Scale insects mainly damage seedlings of oleander, boxwood, holly, and camphor.

Prevention and control methods:

1. Improve ventilation and light penetration. Combine pruning with removing diseased and insect-infested branches and leaves, and dispose of them properly to reduce the source of pests.

2. Chemical control: Spray with 28% chlorpyrifos EC at 1200 times dilution or 40% chlorpyrifos EC at 800 times dilution plus 10% imidacloprid at 1000 times dilution.

Main damage: Seedlings of Buxus microphylla and Buxus chinensis.

Prevention and control methods:

1. Prevention and control should begin as soon as damage is first observed. In early March, check the seedlings for the cocoons of overwintering boxwood borer larvae. If larvae are found emerging from the cocoons, apply pesticides promptly.

2. Chemical control: Spray with 40% cypermethrin EC at 800 times dilution or 25% deltamethrin EC at 2500 times dilution.

Mainly affects: seedlings of large-leaved boxwood, red-leaved plum, peach, crabapple, firethorn, crape myrtle, rose, oleander and other species.

Prevention and control methods:

Chemical control: 10% imidacloprid or 10% Jinshiji at 1500 times dilution.

Mainly affects: seedlings of red-leaf plum, plum blossom, peach blossom, etc.

Prevention and control methods:

1. Promptly treat severely damaged seedlings, prune them properly, and strengthen seedling management.

2. Chemical control: Inject 40% toxic chlorpyrifos or 80% dichlorvos emulsifiable concentrate at a 30-fold dilution into the holes to kill the bacteria.

Mainly affects: seedlings of crape myrtle, peach, rose, narrow-leaved mahonia, and large-leaved boxwood.

Prevention and control methods:

1. In spring, the principle of "prevention first, comprehensive control" should be followed to prevent powdery mildew.

2. Ensure good ventilation and air circulation in the growing environment for seedlings.

3. Remove diseased leaves promptly and spray with pesticides for comprehensive control. You can use 1600 times diluted triadimefon, etc., spray once every 7 days, and continue the treatment for 2-3 times.