1. Hazard characteristics of black branch beetle
The main garden plants harmed by the black branch beetle are tung, magnolia, etc., and the pest generally harms the small branches of the year. Within a few weeks of pest invasion, the affected branches can wilt and die, and each branch has 1-5 borer holes, located on the back of the branches, and is not easy to detect. The general dried moth pest harms plants with weak growth, but the insect can endanger healthy plants, and it is currently on the rise, and the harm is serious.
2. Morphological characteristics and biological characteristics
The worm is a completely metamorphosed insect with four insect states: adult, egg, larvae and pupae.
The black-branched beetle is infested with female adults drilling into the branches of the host plant. When the ambient temperature rises, the overwintering eggs begin to develop, and finally the adults are feathered through two stages: larval and pupae.
The current data of the annual occurrence of generation trees of the black-branched beetle are unknown, but according to the current data, the larvae began to hatch in March, the adults began to appear in April, and the peak period of population development was from June to September.
3. Prevention and control program (chemical program)
(1) Before the Fatong has not sprouted, use the Qilin Famous Land Kang to do the garden clearing work, a set of famous land Kang mixed with water 300 pounds, spraying the whole tree and the ground cover and debris under the tree, can kill a part of the insect eggs and other pathogens.
(2) After the germination and spread of the leaves of the tung tree, from the end of March to the beginning of April, the infusion control of Qilin Yongfan is used, and 15 ml is used for every 10 cm of the chest diameter of the tree. Add 500 ml of water to each infusion bag and add 15 ml of the agent to the infusion bag for infusion. 30 cm requires 3 infusion bags and 45 ml of the agent. Hang the infusion bag as high as possible to avoid pedestrians curiously pulling out the infusion needle.
(3) At the beginning of June, in the season of vigorous growth of The Tung, according to the situation of infusion prevention and control, the whole tree sprays cheng attack + qi logging. 1 bottle of Cheng Gong + 1 bottle of Qifa mixed with water 150 kg. It can effectively control adults and larvae, reduce egg production and reduce the occurrence of pests.
