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What are the methods for preventing rice seedling-stage diseases?
I. Damping-off Symptoms: During the seedling stage, the young shoots sometimes become discolored, the leaves curl, and finally the plants wither and die, spreading very quickly. Control measures: The pathogen of damping-off survives in the soil, and the occurrence of damping-off is closely related to environmental conditions such as climate, seedbed temperature, soil pH, and fertilizer.
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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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Preventing lodging, premature senescence and delayed maturity in rice during the late growth stage
Abnormal phenomena in rice such as lodging, premature senescence and delayed maturity are caused by improper selection of varieties or by the influence of certain adverse factors during the growth and development of rice, resulting in conditions inconsistent with the normal growth targeted by cultivation, and seriously affecting the yield and quality of rice
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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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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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How to control the rice whorl maggot, Hydrellia philippina
Scientific name Hydrellia philippina Ferino, belonging to the order Diptera, family Ephydridae. "Maoyan shuiying" is a collective term for the shore flies that damage rice; besides Hydrellia orientalis, it also includes Hydrellia griseola, the rice stem maggot (Ephydra macellaria Egger) and several other species. Five species have been found worldwide, all similar in appearance
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What are the control methods for rice stem borers?
Netizen Yeshan Judicial Office sent an email on July 4: I am a staff member of the town agricultural technology station. Right now we have too many rice stem borers here, and they are hard to control! I had farmers use Dakuangsha and dimethoate, but the feedback was that the control effect on stem borers was poor. May I ask what methods should be used to control them
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Key Technical Points for Field Management of Rice During the Green-Returning and Tillering Stage
The green-returning and tillering stage of rice refers to the period from transplanting to the time before jointing and booting. This period is important for determining the number of panicles and laying the foundation for panicle and grain development. The main goal of field management is to promote good root development, rapid green-returning, and early tillering, and to form sufficiently strong
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Field Management Techniques for Rice During the Jointing and Panicle Elongation Stage
Rice jointing begins around the peak tillering stage and internode elongation does not stop until several days after heading; in production, this period is called the jointing and panicle elongation stage. The field management goals during the jointing and panicle elongation stage are: on the basis of preserving tillers and increasing panicles, promote strong stems and large panicles, and prevent excessive vegetative growth
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Detailed Explanation of Rice Super-High-Yield Intensive Cultivation Technology
I. Technical Characteristics Compared with traditional high-yield cultivation techniques, the rice super-high-yield intensive cultivation technology system has the following characteristics. 1. Early transplanting of young seedlings. The intensive cultivation technology allows transplanting of 2-3 leaf-age seedlings in winter fallow fields or winter paddy fields, and 3-5 leaf-age seedlings in double-cropping fields
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