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How to prevent and control rice purple sheath disease? Practical methods and key technical points
Symptoms After rice heading, dense pinhead-sized purple dots appear on the leaf sheath of the flag leaf, then gradually spread to most of the leaf sheath or the entire leaf sheath turns purplish-brown, especially obvious on the outer wall of the leaf sheath, sometimes infecting the inner wall or reaching deep into the stem. In severe cases, the flag leaf dies 7-10 days early.
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Integrated Control Methods and Techniques for Rice Stem Borer Damage
Integrated control technology for stem borer damage refers to addressing the adverse conditions of residual toxicity, resistance, and resurgence caused by long-term pesticide application against rice stem borers, minimizing harm to humans and environmental pollution while earnestly implementing the plant protection policy of "prevention first, integrated control," persisting in carrying out pest and disease forecasting
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Control Methods and Technical Key Points for Rice Bakanae Disease
Symptoms: After rice is infected with bakanae disease, the internodes of the affected plants elongate, growing thin and tall, the plant color is paler, the leaves are narrower than those of normal plants, there are varying numbers of adventitious roots inside or outside the leaf sheaths at the nodes, and white mold grows inside the rice stalks, later turning light red, sometimes
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High-Yield Peanut Cultivation Techniques and Disease Control Methods
I. Bacterial Wilt of Peanut This disease mostly occurs from the seedling stage to the peak pod-setting stage of peanut. Spring peanuts are affected from May to June, and summer peanuts from September to October, with a relatively severe incidence rate. In infected plants, the top leaves first become soft and droop, then the leaves of the whole plant wilt and hang down, but the wilted leaves can still remain green
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What are the control methods for peanut root rot?
In recent days, many farmers have brought peanut leaves to the shop to ask what is going on. On the surface, the leaves are yellowing, and some farmers think it is a lack of nutrients, but in fact it is mainly caused by root rot. A while ago, rain was frequent, making the soil damp,
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Control Methods for the Dark Black Chafer in Peanut Fields
The dark black chafer is the dominant population harming peanuts in the Xinyi area, and its larvae (white grubs) not only severely damage peanut pods, but also feed on crop roots in soybean, corn, sweet potato, Chinese medicinal herb, flower and nursery stock fields. In production, corresponding measures should be taken during the adult and larval stages according to the occurrence
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Occurrence Patterns and Control Methods of Peanut Spider Mites
Peanut spider mites occur commonly in Zhaoyuan City, mainly the carmine spider mite (Tetranychus cinnabarinus) and the two-spotted spider mite (Tetranychus urticae), among which the carmine spider mite has the highest occurrence density and causes the most severe damage, while the two-spotted spider mite affects a smaller area, but in recent years the two-spotted spider mite has shown an upward trend in Zhaoyuan City. In recent years, peanut spider mites
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How to prevent and control peanut bacterial wilt? Detailed explanation of prevention and control methods
1. Symptoms. Peanut bacterial wilt mostly begins to develop around flowering, but the disease is most severe during the peak flowering and pegging stage, and the condition eases somewhat after pod formation. The most notable feature of its symptoms is: the aboveground leaves of diseased plants wilt rapidly, the vascular bundles in the underground roots turn brown, and when the root crown is cut lengthwise, in moist conditions a cloudy bacterial ooze can be squeezed from the cut. If the diseased root crown section is suspended and immersed in clear water, a smoky cloudy liquid can be seen gushing from the cut, which is a reliable basis for confirming this disease. Usually the chlorophyll of the wilted leaves has not yet been destroyed, and although the leaves lack gloss, they still remain green, hence the name bacterial wilt.
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How to prevent and control peanut leaf spot? These methods are very practical
1. Symptoms Peanut leaf spot disease mainly consists of black spot and brown spot, and both diseases mainly harm the leaves. When peanuts are affected, symptoms first appear on the lower leaves, then gradually spread to the upper leaves. In the early stage of the disease, small brown spots appear, which gradually develop into round
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What are the control methods for corn smut?
In recent years, corn smut has become fairly common, and when the ear is affected it loses its value for food and feed, so control work should be done early. Throughout the entire growth period of corn, all young aboveground parts can be affected by corn smut. The diseased part is tumor-like, and the size of the tumor varies depending on
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