Insecticide Methomyl has 10-100 times higher insecticidal, acaricidal and nematicidal activity than avermectin, with a wider insecticidal spectrum; stomach toxicity is the main effect and touch; irreversible paralysis of pests, stopping feeding, and death only after 2-4 days, with a slower insecticidal speed; long duration of action, 10-15 days for pests and 15-25 days for mites. No endosmosis to crops, but can penetrate into epidermal tissues; very active against Lepidoptera, mites, Coleoptera and Homoptera, and thrips, and not easily resistant to pests; easily degraded in soil; in protected areas or 10 times the recommended dose for all
The disease is commonly known as "flower foot stalks" Why do you have this name, is that once you get this disease you look at the rice foot stalks are flowered. This disease is caused by a fungus, so call him rice foot disease, and human foot fungus foot fungus seems to be caused by the same fungus. This disease is one of the three major diseases of rice, in recent years, due to the reform of rice cultivation, as well as cultivation calendar level and the amount of fertilizer, this disease is becoming increasingly serious, the general onset of early rice heavier than single-season late rice and post-season rice, the lighter the impact of grain filling (what is filling, that is, when you are still embryonic need to absorb a lot of nutrients, filling is the plant fertilization embryonic period) This disease causes the plant to wither and collapse, can not draw spike, or The spike does not bear fruit, serious field yield can be reduced by more than fifty percent, remember not 10%, not two percent, but fifty percent Oh.
Wheat yield depends on three factors, the number of spikes per acre, the number of grains per spike and the thousand grain weight. The maximum product of these three factors is the embodiment of yield. Generally speaking, high yield is achieved only when there are more spikes and more grains.
Planting peanuts is easy, planting good peanuts is not easy; general yield easily reached, but want to break through the high yield to obtain good economic benefits, you must pay attention to all aspects of high-yield peanut planting technology. Among them, underground pests in the underground gnawing peanut roots and peanut young fruit, not only long and serious damage, serious plots almost extinct. Prevention and control of underground pests is a necessary part of peanut high yield, must pay attention to. In this talk about peanut underground pests about the hazards and common control methods.
The main symptoms include root growth necrosis, yellowing and deformation of new leaves and tips, premature failure of the tree, small and large year (one year's harvest failure) and so on. These problems seriously troubled the citrus growers and affect their economic benefits.
For the planting of hot (sweet) pepper farmers, the problem of dead pepper farmers very headache, especially for more than 3 years of continuous greenhouse, because of dead trees lead to yield reduction or extinction in a few. Through years of planting vegetable farmers concluded that the early planting is an important period to prevent dead trees, in this key point to prevent dead trees, than the fruit irrigation to prevent dead trees effect is much better, the cost is lower than 50%, the loss is also much smaller.
Prevention and treatment of vegetable field snails, can take a combination of measures. (1) Clean the field. Clear the ditches and moisture in time, remove stagnant water, remove weeds, ensure that the border surface is dry, and destroy the snail's habitat and egg-laying place. (2) Artificial trapping. Pile vegetable leaves and semi-dry weeds on the beds and trap snails that are concentrated on them in the morning. Snails perched on vegetable stems and leaves can also be caught artificially in the early morning on sunny days. (3) Sprinkle quicklime. After the soil surface of the vegetable bed is dry, sprinkle quicklime around it, using 5 to 10 kg per mu, the snail will lose water and die after getting lime. (4) Pharmaceutical control. Use 600-750 grams per mu of 6% polyalde-methylnaphthalene granules and scatter them evenly into the field in the evening.
In agricultural production, crop disease control is crucial, in order to prescribe the right medicine, we must first do to distinguish several crop diseases, this article teaches you to identify crop bacterial diseases, fungal diseases, viral diseases, physiological diseases and drug damage. The main characteristics of various types of diseases (a) Fungal diseases 1, will produce different shapes of spots. 2, the spot will produce different colors of mold or powder, no odor. (b) Bacterial disease 1, no moldy or powdery material on the leaf spots, and the spots are very thin and easy to break or string holes. 2, rootstocks and leaves are easy to rot and have a foul odor.
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