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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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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Techniques of rebuilding Pinus sylvestris var.mongolica young forest into Korean pine nut forest
In recent years, the construction of Korean pine fruit forest and Korean pine nut forest in Heilongjiang and Jilin provinces has developed rapidly. Some places regard the development of Korean pine fruit forest as the way to get rich, and large-scale Korean pine fruit forest has been established. However, due to the deviation in people's understanding, they ignore the selection of fine seed spike grafting to build forest, and the selected seed spike is rarely identified. The establishment of Korean pine nut forest like this without selection can not guarantee the yield and quality of seeds. What's more, it can not guarantee prematurity, high yield and stable yield. It has been proved by practice that the juvenile of Pinus sylvestris var. mongolica
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