Control methods of Dendrolimus punctatus

1, building mixed forest: the material basis of Dendrolimus punctatus outbreak is pine and pine forest. On barren hills suitable for forest in disaster areas, mixed forests should be built according to the principle of suitable land and suitable trees; For sparse residual forests in disaster areas, it is necessary to protect and utilize the original ground cover and replant broad-leaved trees.

You can choose oak, chestnut and other FAGACEAE and Leguminosae plants, as well as Schima superba, Manglietia, Magnoliaceae, Cinnamomum camphora, Eucalyptus, Sassafras, Amorpha fruticosa, Myrica rubra, Acacia, etc. The mixing mode can be inter-factory, strip or block.

2. Closing hillsides to facilitate afforestation: For a woodland with sparse trees and many fallen trees, closing hillsides to facilitate afforestation, prohibiting felling and grazing, cultivating broad-leaved species, gradually changing the stand structure, protecting the vegetation under the crown, enriching the forest biological community and creating an environment conducive to the habitat of natural enemies.

Extended data:

The occurrence areas of Dendrolimus punctatus can be divided into normal disaster areas, occasional disaster areas and no disaster areas. Often the disaster areas are mostly distributed in large areas of pure forest areas. Dendrolimus punctatus is a kind of disaster, which mostly occurs in hilly areas below 500 meters above sea level.

Dendrolimus punctatus in Yunnan and Dendrolimus punctatus in Dechang are rampant in the mountainous area of 500 ~ 1000 meters. The affected area of Dendrolimus punctatus in Wenshan can be as high as 1200m. Dendrolimus punctatus has a wide range of harm. In natural forest areas, the height of the disaster area can reach 2000 meters.

In the natural ecological environment, several main Dendrolimus punctatus have the law of periodic rampant disasters. The length of the epidemic period is closely related to the geographical distribution, generation, natural enemy resources, topography, forest types, food quantity and quality, vegetation and climate conditions.

References:

Baidu Encyclopedia-Dendrolimus punctatus