In the summer eggplant planting process, in addition to finding ways to improve the fruit set rate, the control of insect pests is also very important. Common pests on eggplant in summer are tea yellow mites and red spiders, which, when severe, can reduce the yield and quality of eggplant. For example, eggplant is grown in the open field, and after the tea yellow mite harms the young fruit, the peel thickens and the fruit splits. So how should farmers control these two pests?
1. Tea yellow mite
The tea yellow mite is relatively small and has a transparent epidermis and is not easy to detect. Tea yellow mites mainly harm the heart leaves, young leaves and young fruits of the plant. After the harm of tea yellow mites, there are curly leaves, leaf creases, etc., which cannot grow normally when severe, affecting flowering and fruit setting. After the young fruit is endangered, the peel loses its luster and the grain is turned outward, reducing the quality.
Tea yellow mites like warm and humidity, and occur seriously in rainy places with rainy days, poor drainage in the field, poor ventilation in the shed, will aggravate the occurrence of insect pests. Many farmers believe that tea yellow mites can not be prevented, there are two main reasons, one is that tea yellow mites are not easy to find, the other is that the harmful symptoms of tea yellow mites and some diseases are very similar, farmers are not easy to distinguish, according to the disease to prevent and control, often miss the best prevention and control period.
Tea yellow mites mainly harm the top young leaves, many farmers believe that it is caused by viral diseases, in fact, there is still a difference between the two. Tea yellow mites are concentrated on the back of the leaves, and the leaves are yellowish brown after harm, which is the difference between them and viral diseases. Therefore, in order to completely control tea yellow mites, the first step is to distinguish between diseases and insect pests, and then control them.
Prevention and control of tea yellow mites can be used to use pyridoxine, avermectin and other agents, in the spraying, pay attention to the focus on spraying young leaves and young stems, as well as the back of the leaves should also be sprayed in place, in order to achieve the effect of prevention and control.
2. Red spider
Red spider is also a common insect pest in the growth process of eggplant, first endangering the old leaves of the stem, sucking the sap of the leaves, causing the leaves to roll, reducing photosynthesis, and the plant will fall leaves prematurely. Red spiders occur more severely in high temperature and arid places. Timely watering should be used during field management to prevent soil drought and reduce the reproduction of red spiders. Red spiders should be prevented early and treated early, the effect is better, the general acaricide has a good control effect on red spiders, when spraying, the back of the leaf should also be sprayed, pay attention to the agent should be rotated, the prevention and control effect is good.
Whether planted in the open field or in greenhouses, in the high temperature season, it is necessary to control insect pests. When you see a cracked fruit or a shrunken leaf, first distinguish whether it is a disease or an insect pest, and then use drugs separately for control. When choosing a drug, some new drugs or compound drugs have a better control effect, and the key is early detection and early control, in order to control insect pests.