Tea Harm is not to be underestimated
The tea plant is the main pest in the greenhouse vegetable, which seriously damages the growth of eggplant, tomato, pepper, zucchini, cucumber and other greenhouse vegetables.
In recent years, many greenhouses have developed deformed fruit, and the fruits have cracks and their commerciality has been greatly reduced. The edges of the top leaves of the diseased plants curled downwards, becoming narrower and smaller, and the backs of the leaves were gray-brown. The leaves were lustrously glossy on both sides of the main vein. After analysis, at this time eggplant cracking occurred, it is likely caused by the tea plant. The individual tea planters are small and difficult to detect with the naked eye. The harm symptoms are similar to those of the steroid-type agents and are not easily distinguishable. Symptoms of poisoning of hormone-type agents are that the leaves are curled up and stiff, and the veins are heavy. Generally, they become the leaves of the weak plants in the shed, and the color of the leaves when the leaves are curled and curled. According to another survey, recent symptoms such as "pointing" and "toutou" appear on the summer cucurbits of greenhouses, and most of them are caused by the damage caused by the tea plant.
In the recent period of time, the tea plants in greenhouses are at the peak stage of damage, and the temperature of the greenhouses is 22 to 28°C and the relative humidity of the air is above 80%, which is conducive to the occurrence and harm of the tea plant. Current management of greenhouses should pay attention to timely ventilation, and reduce the humidity in the greenhouse by covering the ground film, pouring small water under the membrane, and spreading straw between the gully and other measures. The agent can control tea astragali, which can be sprayed with 70% acetylene catechins 2000 times solution or 240 gram per liter spironolactone suspensions 3000 to 4000 times solution. When spraying, pay attention to the spray on the leaves and thoroughly kill the eggs and larvae on the back of the leaves.
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