Treating aphids Pests such as whiteflies are not as efficient as sprinkling grass seeds, lasting up to 120 days
Characteristics of insect pests and their effects on crops.
Aphids and whiteflies are common insects with stinging and sucking capabilities. Because the temperature and humidity are suitable, it grows rapidly, and it is the most harmful and harmful insect. They draw nutrients from crops and directly destroy the plant's structure; In addition, it secretes large amounts of honey and multiplies other fungi that cover the surface of the leaves with a layer of soot, thus hindering the photosynthesis of the plant. In addition to this, they can spread the virus, causing even more damage to crops.
This aphid is very fertile and can reproduce for 20 to 30 generations per year. Especially in the hot and dry summers, they reproduce faster and can reproduce in just 4-5 days. Aphids have two forms of asexual reproduction and parthenogenesis, overwintering in the soil of weeds, tree crevices and seedling roots in winter, and developing parthenogenesis as the mother in the spring of the following year, and after 2-3 parthenogenesis, they migrate to other secondary hosts (such as crops, vegetables, and weeds) in the summer. Female and male aphids hatched in early autumn will migrate back to their hosts for wintering.
B. tabaci is a bee-like pest that has a strong ability to migrate over long distances at suitable temperatures. And its reproduction ability is extremely strong, in the case of high temperature in summer and summer, it is usually 5-7 days to complete the reproduction of a generation, and there is a big iterative problem. An aphid can produce 50-60 small aphids a week, and can reproduce millions or tens of millions in a month, so even if the insecticide is sprayed, the aphids that are not sprayed will quickly multiply a large population.
Aphids and whiteflies are not only highly fertile, but also show high resistance to conventional chemical agents. At present, the amount of pesticides commonly used is more than three times, which will quickly develop resistance, which seriously restricts the effectiveness of control. The conventional approach is to wait for an outbreak before taking measures, but it is difficult to completely control it due to its rapid proliferation and strong flight characteristics.
2. The most effective control measures - thiamethoxine is a new type of pesticide used to control aphids, whiteflies and thrips and other stinging and sucking mouthparts. The preparation has a certain irritation to human ** and also has a certain effect on the toxicity of the stomach. thiamethoxam can enter the soil stably for a long time, be adsorbed by roots and seedlings, and be transported to all parts of the plant through the xylem of the plant, with a high retention rate and a low degradation rate. Moreover, its metabolite clothianidin has a strong killing effect on pests, which can achieve the effect of long-lasting killing pests.
clothianidin can be widely used in wheat, corn, cotton, peanuts, soybeans, cucumbers, watermelons and other crops. During the prevention and ** period, the following methods can be employed:
1.Spreading: Before sowing the wheat, 2-3 kg of "Kelbinin" granules are mixed with other fertilizers, and before sowing, they are mixed with 15-20 kg of organic fertilizer, and then sowing. The present invention can control parasitic insects such as aphids, planthoppers for a long time, and the efficacy can reach 120 days.
2.Acupuncture application: tomatoes, peppers, eggplants, cucumbers, watermelons and other crops that need to be transplanted with seedlings can be sprinkled with 1-2 kg of 3% "Kenedin" slow-release granules at the time of sowing, with 15 kg of organic fertilizer, and then applied to the acupoint when transplanting. This technology has a long-term control effect on stinging and sucking natural enemies such as aphids, thrips, whiteflies and whiteflies, and the effect of stinging and sucking pests such as aphids, whiteflies and whiteflies is remarkable, and the efficacy can reach 120 days. However, pest control is a complex system engineering, which needs to be achieved through a combination of planting management, ecological regulation and chemical control. In specific applications, the specific conditions and characteristics of the region should be combined, and the effects of ecology and human health should be comprehensively considered, and selected and applied according to local conditions.