In order to carry out the Party's mass line education practice activities, the Agriculture and Animal Husbandry Bureau recently sent experts to take a rigorous survey of vegetable pests and diseases. The senior agronomist Du Zihai of Plant Protection Station was in the vegetable sheds of Yangzhuang, Beimazhuang and Yaozhai in the county. The tomato was found to have a "strange disease". The 2-3 leaves near the upper part of the plant were creased, and some of the leaves shrank into a linear shape. The farmers called it "lobular disease" or "wild leaf disease." The farmers have no effect in terms of virus disease, wheat field herbicide drifting, or spraying anthrax. After picking the leaves in the room for microscopic examination, it was determined that the cause was damage caused by the tea plant. The damage rate is generally 10%-30%, and the weight is as high as 60%-80%, which seriously affects the growth of the plant and has a great influence on the flower and fruit production.
Tea-yellow pupa is an Arachnidae, a species of Aphids, and a family of Aphids. It is one of the pests that endanger vegetables. It is extremely miscellaneous and has a wide range of host plants. It mainly damages vegetables such as tomatoes, cucumbers, eggplants, peppers, potatoes, melons, beans, celery, and radish. In recent years, the damage to vegetables has become increasingly serious. The adults and young cubs concentrate on sucking young parts of vegetables. The back of the victim's leaves was grayish brown or yellow-brown, oily, and the edges of the leaves curled downwards, and the fruit affected skin became yellow-brown.
Conservation land cultivation can take place on an annual basis. It is often seen in the middle and early March, and severely affected fields can be seen from April to June. The open field is seen in the middle and late April and is prosperous from July to September. Camellia genus is a thermophilic pest, and the most suitable climatic conditions for the hazard are temperature 16-27°C and relative humidity 45%-90%. The persistent warm winter is the main reason for the early occurrence of yellow tea in early spring.
Control methods: In the initial stage, 3.2% avermectin EC 2000 times, or 15% WP 1500 times, or 10.2% Avicin 1500 times can be used for prevention and treatment. In order to improve the control effect and restore growth as quickly as possible, organic silicon synergist and Huafu Agro Fertilizer, Greenfield God and other humic acid foliar fertilizers can be added to the liquid. Pay attention to spray the liquid evenly on the upper leaves, tender stems, flowers and tender fruits of the plant.
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