Prevention and control of major pests in vegetables in August
In the middle and late August, the period of the damage caused by vegetable pests was also the period of seedling transplanting for autumn cauliflower, cabbage, and Chinese cabbage. Summer beans, loofah, green soybeans, and shallots were all growing vigorously in the field. The high temperature of the weather is changeable. Pests in the field are complicated and seriously damaged. After comprehensive analysis, it is expected that three generations of Spodoptera litura will occur this year. Three generations of Spodoptera litura will occur moderately, and greenhouse tobacco whiteflies will show partial preference. To this end, all localities must strengthen pest monitoring of vegetable pests, classify and guide various prevention and control efforts, and ensure the safe growth of vegetables. First, what happened 1. Spodoptera litura lurking on this site: On July 11th - August 8th, a total of 35 lanterns were captured, similar to last year. A moth peak appeared on August 1-5 and the average moth volume was 5.3 heads per day. On August 7-8, this site surveyed cabbage, taro, and kidney beans in the southern suburbs. The average number of eggs was 10 eggs and 15 insects. The field is expected to enter the middle of the young larvae in mid-August, and the second peak will appear in late August. 2, Spodoptera exigua according to black light lamp lure: Since mid-July, the amount of moth is less. A small moth peak appeared on August 4, with a peak of four moths. On the morning of August 7th, rapeseed fields were investigated and sporadic investigations showed that young larvae were the victims. It is expected that the amount of insects in the field will increase in mid-August and the damage will increase. 3, Bemisia tabaci Bemisia tabaci is a newly emerged puncture sucking pest in China in recent years, mainly in greenhouses and surrounding vegetable fields, hazards, rapid spread, strong outbreaks, mainly damage leaf vegetables (radish, vegetables, cabbage , broccoli), melons (cucumbers, watermelons), eggplants (pepper, eggplant) and other fruits and vegetables. On August 8 in the southern suburbs of China, investigations revealed that the occurrence of Bemisia tabaci in vegetables around greenhouses has risen, and the number has risen significantly compared with the previous period. If it is not controlled, the damage will increase. 4. The bean pods bore larvae, flowers, and pods with larvae, resulting in buds, falling flowers, and insects. The buds and flowering stages of cowpeas are the culprits of the disease. At present, a small amount of late-seeded summer kidney beans begin to blossom and grow. According to the investigation of Ludu and Chengxiang in August 7-8 in Japan, the flowering rate of cowpea was 5-15%. High-temperature weather favors the reproduction of Bean Bunting population, and it is expected that the third generation of larvae will occur in the middle and late August. Second, prevention advice 1, Spodoptera litura, Spodoptera exigua focus on the prevention and control of young cabbage, cauliflower, Chinese cabbage and heat-resistant cabbage, spinach, cowpea, soybean, Chinese wolfberry, chives and other vegetables in the field. The control period is August 11-13 and will be repeated every 7-8 days. The first time can be used 5% Suppressor 1500 times liquid, 2.4% fast floating liquid 1: 1000 times liquid, 50% agriculture and forestry 1000 times liquid spray, the second time can choose 10% Divide 2000 times liquid, 20% rice bran 1500 Double spray. Spraying should be selected in the evening to improve the control effect. 2. Bemisia tabaci. Currently, Bemisia tabaci is mainly concentrated in greenhouse vegetables and surrounding plots. The greenhouse vegetable fields and open-leaf vegetables that have already occurred should be prevented and controlled in time to curb the outbreak of Bemisia tabaci. Drugs can be used 25% Jimmy Jia 1000 times or 5% fipronil 1500 times. Because adults of Bemisia tabaci can fly and spread easily, when spraying, they must be surrounded from the fields to the center of the field to ensure the control effect. 3, bean wild rice medicine object is to enter the flowering buds of all cowpea. It is required to continuously use drugs during the flowering period of cowpeas, apply once every 7-8 days, and spray at 8 to 10 o'clock in the morning. Medicinal species selected pyrethroid 1:2000 times small machine spray. Dried Caraway,Dried Thyme Leaves,Caraway Plant,Caraway Herb Ningxia Lihe Food Co., Ltd. , https://www.lihedried.com