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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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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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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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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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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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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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What are the pitfalls to watch out for when introducing rice varieties?
Rice has entered the sowing season. In recent years, farmers introducing varieties on their own initiative has become fairly common, but few of the introduced varieties perform well in overall traits, and some have even caused severe yield reductions. In fact, the seeds farmers need can be purchased from their local agriculture department and seed department. If
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What are the disease prevention and control methods for licorice cultivation?
The main diseases of licorice are: rust, brown spot and powdery mildew. The prevention and control methods are as follows: 1. Rust: when infected, yellowish-brown scar-like lesions appear on the underside of the leaves; after the epidermis ruptures, brown powder is released, which is the uredinium of the pathogen; in August-September, dark brown telia
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What issues need attention when growing licorice?
1. Seed treatment. Before sowing, treat the seeds with water at 60-100°C for 30 seconds; then soak them in warm water for 1 day and night, and the germination rate can reach 50%. If treated with concentrated sulfuric acid, remove the seeds immediately once the seed coat turns black and rinse them in clean water, then soak them in warm water, and sow when the seeds swell; the germination rate can reach more than 90%.
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Detailed Guide to Licorice Seedling Cultivation: From Sowing to Seedling-Stage Management
1. The seedling bed should be chosen in a plot of deep, fertile, loose humus soil or sandy loam. Apply 2000 kg of farmyard manure, 25 kg of superphosphate, and 10 kg of potassium sulfate per mu as base fertilizer, plow deeper than 40 cm, level and harrow fine, and make flat beds 100 cm wide for later use.
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