Occurrence regularity of wheat moth in Robinia pseudoacacia seeds?
The occurrence rule of wheat moth in Robinia pseudoacacia seed is that there are two generations a year, and the larvae overwinter in the angle of the damaged pod. The adults emerged in the middle of June of the following year, and the eggs were laid on the edge of the pod horn. The newly hatched larvae often feed on the pod stalks of the damaged species in the dry sepals, then eat into the pods to harm the young seeds, and pupa in the pods after maturing. The pupa period is 7 days, and the adults continue to lay eggs and hatch after Eclosion. The second generation larvae endanger until autumn and overwinter with small gray-white cocoons in the pods.
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What are the characteristics of Xiaofeng of Robinia pseudoacacia seeds? What is the method of prevention and control?
Robinia pseudoacacia seed wasps mainly harm Robinia pseudoacacia. The larvae feed on the seeds in the pods. Adult, about 3 mm long, black, yellowish brown antennae, raised chest, transparent wings, short thorns in cloth, simple wing veins, yellowish. Ovate, fusiform, with long slender stalks at one end. Larva, the last instar body is about 4 mm long, milky white, the head is inconspicuous, the upper jaw is brown, the body is curved. Robinia pseudoacacia seed wasps produce two generations a year. Overwintering as larvae in seeds. In the coming year, it usually pupates from April to May, and adults appear and lay eggs after the first and middle of May.
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A New Variety of Robinia pseudoacacia: Erdu Honghuahuai
Sophora japonica L. is a rare landscape tree species, arbor, introduced into Henan Province by Holland in 1996. It can grow normally in Henan. It is rare because it blooms twice a year, the first flowering around May 1, and the second flowering around July 10. The flowers are large, pink and 3.7 cm long. Each flowering period lasts about 15 days. The young leaves are yellow with red, and the stems are reddish brown at the end of growth. The annual seedlings are about 3 meters high and are excellent street trees and garden greening trees.
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