Introduction of carrot varieties and cultivation of summer and autumn sowing
First, the harm symptoms The yellow-bellied fleas mainly harm cruciferous cabbage, broccoli, cabbage and solanaceae, melons, and beans. Adults and larvae can cause harm. The adults in the vegetable seedling stage are seriously endangered. The newly emerged seedlings of the seedlings are eaten, resulting in the death of the whole plant, resulting in the lack of seedlings and ridges; the adults of adult vegetables eat the leaves, causing many small oval holes in the leaves, and the leaves will be seriously damaged. All eaten, leaving only the veins, but also bite off the stems and tender stems, bite the fruit, but also harm buds, soybean meal. The larvae of the yellow-bellied flea beetle live in the soil and only harm the roots of the roots. It peels the root bark or breaks into the roots to form many tunnels, causing damage to the roots of the seedlings, causing the plants to wither and die, causing the entire vegetable to die. Second, prevention and control measures 1. Agricultural control: 1 round of dumping. Yellow striped hops eat cruciferous vegetables, so with other vegetable rotations will help reduce pest occurrence. 2 Completely clean the garden. Remove defoliants from the vegetable field, eliminate weeds, eliminate overwintering sites and foodstuffs, and reduce the number of overwintering populations. 3 Deepen the sunburn. Deep fall in autumn and winter, eliminating overwintering adults. Deep plowing soil before sowing can not only worsen the living environment of larvae but also kill some insects. 2. Chemical control: 1 Grasp appropriate control. Prevention and control should seize the principle of the beginning of the spring and the important period of autumn, and adhere to the principle of “early treatment at the seedling stage, larval management, and adult treatmentâ€, and take root and spray measures to control the occurrence of pests. 2 grasp the characteristics of prevention. Because adults are good at jumping and strong in activity, they should use enclosed sprays for prevention and control, spraying from the periphery to the center to prevent adults from escaping. Because the larvae live in the soil and endanger the roots, the liquid can be used for irrigation when it is controlled. 3 Take time to prevent and control. It can be controlled at the height of adult activity. In the spring and autumn, the pesticide application is better at around 12 noon, and it is suitable for medication in the morning and evening in summer. 4Appropriate application of pesticides. When each vegetable has 2 to 3 adults, it should be used immediately. It can be sprayed with 40% Loessin (chlorpyrifos) EC 1000 times, 2.5% rotenone EC 500~800 times or 5% Pepsice (cypermethrin) EC 1000~1500 times. The control of larvae can be applied to the soil with 5% Ankley 1 to 2.5 kg of finely ground 10 kg before sowing, or 48% of the 48% Lester Ben EC per 667 square meters (1 mu) during the larval damage period. Water pouring or spraying against the water to prevent seedlings from being killed. Dental Nitrile Gloves,Nitrile Gloves Large,Eu Medical Dental Gloves,Gloves Nitrile Disposable Gloves Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshimedicals.com