The damage and prevention of tea saponins

Qingzhou City, Shandong Province, has a large area of ​​autumn peppers. In recent days, many vegetable farmers in Qingzhou have reported that this year's autumn chillies have caused serious tea planting, causing the phenomenon of falling, defoliation, and fruit drop. Chemical control is also difficult to control. The yield and quality of pepper also reduce the economic benefits of vegetable farmers.

The life cycle of Camellia stramonium is short, its reproductive ability is strong, its developmental optimum temperature is 18-28°C, and it prefers a warm and humid environment. At the end of autumn, the ventilation time in the greenhouse decreases, and the temperature and humidity in the shed increase, which is very suitable for the growth of tea plant And breeding; In addition, the yellow tea worm body is small, often difficult to find the naked eye, and can spread through creeping, wind, agricultural operations, etc., which is the main cause of the occurrence of tea yellow wolfberry. In this regard, the prevention and treatment of tea-yellow pods recommends that vegetable farmers pay attention to the following points:

1. In the premise of ensuring the temperature of the greenhouse, try to increase the ventilation of the greenhouse and reduce the humidity. Create environmental conditions that are not conducive to the growth and reproduction of the tea plant.

2. When the chemical is controlled, the spraying site should be comprehensive. The tea plant is small in size, and prefers spawning on the back of the tender leaves, tenderness on the back of the bowl, or concealment in the earth seams and weeds. Therefore, the entire plant should be sprayed when using the medicine, including the back, ground, columns and walls. In addition, spray as much as possible to use a good spray atomizer effect, and add synergists, such as sugar or silicone, etc., in order to enhance control efficiency.

3. Insecticides, ovicidal co-administration, or the use of insects, eggs are killing agents. This is because only the no-killing acaricides are used. Although the number of tea aphids has declined in the short term, the population will soon rise again and need to be re-administered. Therefore, it is best to use insecticides that kill insects, eggs, and eggs, such as spironolactone, pyridoxine, and abamectone esters.

4. Safe medication, do not arbitrarily increase the dosage. In the process of preventing and controlling tea aphid, when the control effect is not obvious, it is necessary to first find out the reasons, or rotate the medication, or improve the method of medication, rather than arbitrarily increase the dose or concentration of the drug, one is prone to phytotoxicity, two It is easy to induce drug resistance and cause unnecessary losses to vegetable farmers.

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