Pests of Paulownia and Their Control

Pests of Paulownia and Their Control

Cutworms

1. Remove weeds and eliminate egg-laying sites;

2. In the early morning, before the larvae enter the soil, they can be caught manually;

3. To kill larvae with poison bait, chop an appropriate amount of green vegetables, add 90% trichlorfon crystals, stir evenly, and spread it evenly in the nursery in the evening;

4. Use sweet and sour liquid to lure and kill adult insects. It is made by mixing sugar, vinegar, wine, flour and 90% dichlorvos crystals in the ratio of 3:1:1:2:1, and it is used to lure and kill adult insects at night.

Mole Cricket

Adults and nymphs are mostly active at night, mainly feeding on the tender buds and seedlings of Paulownia, causing them to wither and die, resulting in a serious shortage of seedlings. The prevention and control measures are as follows:

1. Use chemicals to treat the soil. You can sprinkle an appropriate amount of 90% dichlorvos crystals on the soil surface and then plow the land.

2. You can use 90% dichlorodiphenyltrichloroethane crystals and chopped fresh grass in appropriate quantities, add a little water and mix evenly, and sprinkle it on the ground in the evening to kill mole crickets.

Paulownia leaf beetle

Adults and larvae damage Paulownia leaves. June and July are the peak periods of damage. The prevention and control measures are as follows:

1. Artificial killing of larvae, pupae, etc.;

2. You can spray 90% trichlorfon crystals or 50% malathion 1000 times diluted for prevention and control;

3. Protect and utilize parasitic wasps, the natural enemies of Paulownia leaf beetles.

Paulownia spp.

The damage is most serious in July and August. The initial symptoms are small yellow spots on the front of the leaves and dark red dots on the back. Later, the leaves curl, dry up and turn brown, and then fall off, looking like they were burned. In severe cases, they may even die. The prevention and control measures are as follows:

1. In late May, you can spray 4000 times diluted 3% hypertonic fenoxycarb or 3000 times diluted 2.5% cypermethrin, once every 20 days or so.

2. Strictly quarantine Paulownia seedlings. In late autumn, remove and burn dead branches and fallen leaves in the fields in a timely manner.

3. Deeply plow the soil in winter to eliminate overwintering adult insects.

Red headed gentian

The damage is caused by the adults feeding on leaves. Adults are most damaging in mid-June, and they begin laying eggs in early July. The prevention and treatment methods are as follows:

1. Artificial nets are used to capture adult insects that feed in groups;