At present, it is necessary to carefully control cotton aphids.
Due to the recent low rainfall and high temperature, the number of cotton aphids increased sharply, which was significantly higher than that in the same period last year. If there is continuous high temperature and little rain, the number of cotton aphids will increase, which will lead to the occurrence of summer aphids. If the control is not timely, the cotton yield will be affected. Therefore, farmers should carry out prevention and control in time to achieve careful prevention and heavy prevention.
1. Chemical control. ① was sprayed with 1000-1500 times of acetamiprid or 10% imidacloprid EC, ② was sprayed with 1000-1500 times of 2.5% aphid trackless EC, and ③ was sprayed with 10-15000 times of 30% poisonous aphid EC.
two。 Points for attention. ① cotton field should be widely used to control aphids, and the dosage should be increased in areas where aphids occur heavily, and the medicine should be used again every 3-4 days. Attention should be paid to make the liquid hit the back of the leaves when using the medicine, so that the efficacy can be brought into full play. When ② is used to control aphids, do not mix propranolol, because the plants with serious aphids are often small, the spraying is more, and the plant growth is more inhibited when the dosage is large.
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Yellow tea review
The shape of yellow tea is obviously different due to different varieties and processing techniques. For example, Junshan Silver Needle Tea is in the shape of a needle, the bud head is fat and full of hair, and the bud is thin and flat, little is bad. The masked yellow buds are flat and straight, the buds are strong, and the buds are curved and thin. Luyuan tea with the cable tight knot curling ring, Xianhao for the best, the strip is loose and straight, not obvious for the poor. In Huangda tea, it is better to have thick leaves, long and strong stems and connected leaves, while leaves like leaves, thin and short stalks, separated stem leaves or broken stem leaves are worse. The color is drier and darker than yellow, golden yellow is the best, and the color is dry and dark.
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Occurrence and control of tea mites in greenhouse
In the production of fruits and vegetables in the greenhouse, it is often seen that the growing points of some seedlings are curled and shrunk, and the fruits are deformed and cracked, which cause serious losses to the production. Because the temperature and humidity in the shed is very suitable for the growth and reproduction of tea yellow mite, fruits and vegetables are its main targets, the mite is very small, and people can not see it, so it can not be prevented and controlled in time. Therefore, the area of damage has become larger and larger in recent years, which should be paid great attention to by the majority of producers. Tea yellow mite is a harmful micropest of arachnida, acaridae and tarsus acaridae. Mainly harms cucumber, eggplant and Xihong in greenhouse vegetables.
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