The prevention and treatment of stick insects

The main insect pests that are harmful to Begonia are:

1. Pingshi nest moth. The larvae mainly feed on the flowers and fruits of plants. From late September to October, the larvae are mature and spiny knots are thin, and the cracks in the shallow soil or the bark are internalized and overwintered. Control methods:

(1) Remove broken tree stumps and cracked bark in winter and kill overwintering larvae.

(2) In July, 10 cm long crumpled cardboard was used to entangle the old mature larvae around the tree.

(3) The larvae hatched and were sprayed with 1000-times killer pine or 2000 times solution of permethrin.

2. Gypsy moth. Mainly larvae are harmed. Newly hatched larvae are usually clustered on the back of the leaves and eat leaves at night. In severe cases, the leaves of the whole plant can be eaten; the 2nd instar larvae are in the gaps of the bark, tree shrews, weeds and trees under the trees during the day. Under the lurking. Control methods:

(1) In the evening of the feast, blacklights are used to trap the adult.

(2) When a large number of larvae occur, they are sprayed with pyrethroid insecticide or 50% phoxim EC 1500 times solution, or 2.5% cypermethrin EC 3,000 times solution.

(3) Coat the base of the trunk with a 100-centimeter 90% solution of trichlorfon to make a 100-fold dose of the drug, and kill the larvae.

(4) Remove the eggs and burn them.

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