In winter, the temperature is low, and the damage caused by yellow tea leaves in open field vegetables is not serious, but the greenhouse vegetables are different. During the winter most of the time, the temperature in the shed is relatively high, and the relative humidity of the air is relatively large, which is beneficial to the damage of the tea plant, so the yellow tea plant in winter greenhouses is a common and serious hazard. However, the individuals of the tea plant are extremely small and the hazards are hidden and difficult to identify with the naked eye. They are often misdiagnosed as physiological diseases or viral diseases and delay the prevention and treatment. Generally caused by greenhouse vegetables 15% -30%, serious reduction in production by more than 40%. Prevention measures are as follows.
Newly built greenhouses to prevent invasive tea plants always invade from surrounding weeds into the shed. Therefore, weeds should be eradicated timely in newly built booths and weeds in the shed, and the abatement agent should be sprayed on the back slope with poor ventilation and high humidity. After the harvest of the vegetables, the litters were promptly removed and treated in a centralized manner. At the same time, deep plowing of cultivated land, not applying unripe organic fertilizer, avoiding pruning and other operations from other sheds into the source of insects.
The ecological control used the temperature requirement of the growth and development of the tea plant, combined with the management of the greenhouse, to treat the large temperature difference, so that the daytime temperature reached 35°C for 2-3 hours, and the night temperature dropped to 11°C. According to the survey, the indoor temperature reached 35°C, the hatching rate of eggs was significantly reduced, and the mortality rate of adult pupa and juveniles was significantly increased; the room temperature of 34°C-35°C lasted for 2-3 hours, if the mortality rate of crickets was up to 80%, the deaths of pupa died. The rate reached 60%.
Chemical control in the initial stage of the use of oral acaricide control. The first application of biological agents is the application of pesticides, followed by the use of high-efficiency, low toxicity, low residual chemical pesticides, and strictly control the safety interval. The pesticide was sprayed on the young part of the upper part of the plant, and the liquid on the leaf surface was evenly sprayed.
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