Trends and Prevention of Vegetable Pests in Autumn

This year, continuing high-temperature and dry weather is unfavorable to the growth of vegetables, but it is beneficial to the occurrence of many kinds of pests that are suitable for high temperature and drought. The population of worm populations is more, and the next stage will enter the period of vegetable production in autumn, which is a variety of diseases. The key to pest control. Insect pests: 1, Spodoptera litura, Spodoptera exigua: This year due to high temperature and drought, two kinds of noctuid moths occur heavier, especially in the monitoring points of the Agri-industrial and Commercial Xinghui Vegetable Company, from the end of July to mid-August, more than 20 days in a row. There are more than 200 heads of moths, and scallions have been severely damaged. Recently, they were in the 4th generation. At the end of the month, they will enter the appropriate period for the control of the five generations. 2, bean field wolfberry: According to the previous stage of the insect forecast report analysis, September is the peak period of four generations of bean field pods, the main object of damage for the late cowpea, Qiugou beans, for the budding flowering beginning and prosperity In the late period of the late period, the kidney bean and the autumn bean are used for drug prevention and treatment. The use of pyrethroid pesticides is recommended, and the use of drugs in the morning when the flowers are in full bloom can improve the control effect. 3. Gualou: It is estimated that the end of September will enter the first generation of the five generations of melons. The beginning of the season will begin. In late September, the insecticides will be used for prevention and treatment twice. The interval between medications will be five to seven days. 4. Bemisia tabaci: The city station and the Minhang District and Songjiang County observed the melons and observed that the density of insect population began to increase recently. Most of them are currently in the flood season. It is expected that the population will enter the peak of the adult population from the middle and late September and it will control the insect population. The key time for the occurrence and prevention of the spread of insect resources is to look at organizational strength and strengthen investigation and prevention. Since Bemisia tabaci is a new pest species, its morphology is very similar to that of quail eggs and locusts, which can easily lead to misdiagnosis. Therefore, vegetable growers should pay attention to checking field heads and seize the critical period for appropriate control. Pesticides with good control effect on B. tabaci were Aketai, 15-20 g per mu, or 4000-5000 times liquid. 5. Liriomyza sativae: Due to the continuous high-temperature weather, the peak time of autumn peaks is about 20 days later than normal, and it is predicted that there will be certain damages in the vegetable fields of beans, melons, and eggplants in the middle and late September. , from the current attention on the knife bean, cowpea, autumn cucumber, autumn watermelon, autumn tomato, etc. for preventive control, do not go to the crop when it is full of insects, then control, can choose to use insecticide, organic phosphorus, chrysanthemum Ester (careful use on melons) pesticides. 6, Plutella xylostella, Pieris rapae: Autumn drought and less rain, conducive to the occurrence, but also because of the large-scale promotion of shade net cultivation in recent years, the field population over the summer population density is higher than average, from September to late due to pay attention to pest occurrence dynamics, The use of biological agents such as BT in the control of Spodoptera frugiperda can significantly improve the control effect. 7, locusts: As this summer and autumn continuous high temperature and drought, is conducive to the occurrence of locusts, attention to the timely control of locusts, prevention and control of transmission of the virus disease. Disease aspects: 1, autumn cucumber: The most recent diseases are mainly bacterial blight, bacterial spot, powdery mildew, anthrax. The application of pesticides can be controlled by Shigao, Haolik, Garinong, Fenghua Amine, and Prec. 2, cowpea rust and powdery mildew, root rot. Rust and powdery mildew selected Shigao, Haolik and Triadimefon pesticides. Once the root rot is more difficult to control, it can be used to prevent rooting at 1000 times. It can also be used for scientific rotation, soil disinfection, and cultivation management to clean up the ditch system so as to prevent the bacteria in the field from flooding after thunderstorms. Increase the hazard. 3. Leafy mildew, virus disease, and soft rot: Leaf is the largest production season for cruciferous vegetables in the autumn. This year's fall will be followed by high temperature and drought. Once it rains, it will often cause three diseases and serious consequences. Each production unit should do a good job in preventing rain and silk, and often clean up the drainage system. After transplanting, it begins to use Caifengning roots to prevent soft rot, and pay attention to the timely control of cabbage caterpillars, diamondback moth, aphids, etc. Insects, prevent wounds and rot caused by helminths, cause soft rot, and prevent and control maggots, regularly use therapeutic and protective bactericides such as Kimredaermir, Keluo, Ank, Dasheng, Fengye Amine and other pesticides to control and control. The occurrence of downy mildew. 4. Sterilization treatment before sowing of winter and autumn seeds: Seed treatment can increase the rate of seedling emergence, and can also prevent seedling disease. When seed coating agent is used, it can control all seed germ-borne fungal diseases. The amount used is the seed weight. From three to five thousandths, the cost of preventing and controlling diseases is less than 0.5 yuan, which is cost-effective and worth promoting. In particular, broad bean, root rot occurs quite seriously, seed treatment in advance, can significantly reduce the dead plants at adult stage. China Agricultural Network Editor

Posted on June 11, 2018