Castanea henryi is one of the important sources of economic income for farmers in the mountains of northern Anhui. In recent years, serious diseases and pests have caused a reduction in production. This study was carried out.
Major pests
The main pests in northwest Yunnan include chestnuts, chestnuts, chestnuts, pruning weevils, chestnut venom moths, and crickets.
Comprehensive Control Measures of Main Pests of Castanea henryi
Cultivation management measures
Proper planting and pruning of suitable plants can suppress the occurrence of pests and diseases. Pruning and cutting off pests and branches in winter, especially in chestnut forests with severe chestnut venom bees, have significant effects on intensity pruning prevention. In winter, pruning can also reduce the density of crickets on winter branches. In autumn and winter, when the plants are deeply plucked and buried in soil, the pests can be overwintering, which can significantly reduce the damage of the pruning elephants, chestnuts, and chestnut moths.
Protecting and using natural enemies
Green manures or other legumes can be interplanted in forests, and canopy can be mixed with Cangshan seeds in the early stages. To avoid unnecessary tending and man-made destruction, establish relatively stable natural enemy populations, and pay attention to the use of highly effective and low-toxic pesticides and rational application of pesticides to reduce the number of natural enemies. The natural enemies of Castanopsis chinensis mainly include winged long-tailed wasp, yellow-bellied long-tailed wasp, skipping wasp, miscellaneous broad-shouldered wasp, silkworm chasing fly, Steinernema elegans, carnivora, and drifter.
Biological control and chemical prevention
The application of Beauveria bassiana in the prevention and control of S. virescens, P. syringae, P. utilis, and P. nicotiana has good results. In July and August, spraying of Bacillus thuringiensis and S. moth was controlled with Bacillus thuringiensis, and the chestnut pods in the middle and lower parts of the tree were sprayed. The control effect was significant. In the winter, it is necessary to scrape the egg mass of the chestnut manually or coat it with lime sulfur. During the oviposition period of Chlamydifolia chinensis, the landing chestnuts and fruit branches are collected once a week in a timely manner and burned in a concentrated manner, which can eliminate most of the insect sources.
Chemical control
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