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How to prevent and control spring soybean virus disease? Detailed explanation of occurrence patterns and control methods
Viral disease is a major disease of spring soybean, causing about 15% yield loss in normal outbreak years and over 50% yield loss in severe outbreak years. 1 Symptoms After spring soybean is infected, the upper leaves first show light yellow-green mottling, and the mesophyll bulges in a blister-like manner along the veins; then the mottling and wrinkling become increasingly severe, the leaves become deformed, the mesophyll protrudes, the leaf margins curl downward, plant growth is clearly stunted, the number of pods decreases, the pods are small and slender, and the pods show deformed symptoms such as flattening and bending. After infected spring soybean matures, the seeds are clearly smaller, and light brown streaks can appear on the seeds.
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Spring field management for winter wheat: remember these eight key points
Spring is the critical period that determines the number of spikes per mu, the number of grains per spike and grain weight in wheat. Strengthening spring field management according to seedling conditions is the key to achieving high wheat yields. In terms of management, the eight key points of pressing, raking, clearing, topdressing, watering, controlling, preventing and protecting should be implemented as priorities. Pressing: namely early
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To manage spring care of late-sown wheat well, it should be carried out according to its characteristics.
Every year there are always some wheat fields sown relatively late. The characteristics of late-sown wheat: First, the tillering period is short. Because sowing is late and emergence is late, there is no tillering period before winter, and the spring tillering period is generally less than 20 days, so the number of tillers per plant is small, and the tillering roots are also few, which is the main reason for slow growth in spring.
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Four protections to do well in spring field management of wheat
To ensure high and stable wheat yields, after the beginning of spring, four protections should be emphasized in wheat management. First, prevent waterlogging damage. After the beginning of spring there is generally more rain, and if drainage is poor and soil moisture is too high, waterlogging damage is very likely to occur. Ditches should be cleared and drainage carried out in time, and plant ash should be spread between the rows to loosen
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Occurrence of Spring Frost Damage in Wheat and Remedial Measures
Every year in February and March of spring, cold air frequently breaks out and moves southward in the north, with a large temperature drop during the process, and wheat that has jointed too early often suffers frost damage. At this time, for seedlings growing too vigorously, the method of pressing should be adopted to inhibit growth; for weak seedlings, reasonable topdressing should be applied to promote weak ones into strong ones
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What are the methods for applying fertilizer based on seedling condition during the wheat green-up stage?
Spring has come, the earth's warmth rises, wheat awakens from its winter dormancy, and the green in the wheat fields increases. At this time, many farmer friends ask: Does my wheat need fertilizer? What kind of fertilizer is good? How much fertilizer is appropriate? And my answer is: apply fertilizer based on seedling condition. From
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How to treat peanut seeds before spring sowing? These points you need to know
The farming proverb says that around Grain Rain, you plant melons and sow beans, and the busy spring plowing work is about to begin. Today let's discuss with fellow farmers the methods for treating peanut seeds before sowing, to lay the foundation for uniform emergence, full stands, and strong seedlings. First, select good seeds and superior seeds, and classify the seeds.
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Detailed Explanation of Key Techniques for Film-Mulched Spring Peanut Cultivation
Film-mulched cultivation of spring peanuts has the advantages of keeping warmth, preserving moisture and fertilizer, improving the soil environment, ensuring uniform and strong seedlings, promoting growth and development, advancing maturity, and increasing yield and income. It can generally increase yield by 20%-30% and increase net income by 50-100 yuan per mu. I. Fine land preparation
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Key Techniques for Plastic Film Mulch Cultivation of Spring Peanuts
The plastic film mulch cultivation technique for spring peanuts is one of the "Top Ten" advanced agricultural technologies promoted by the Ministry of Agriculture. It was introduced to our city for trials in 1998 and began demonstration and extension in 1999. Years of practice have proven that this technique is indeed an important measure for improving peanut yield and quality.
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The correct method for soaking and germinating hybrid rice seeds
Now is precisely the main spring production season. A small number of farmers, due to improper operation during the soaking and germination process, have encountered problems such as seeds turning sour and smelly and poor sprouting. Therefore, when soaking and germinating seeds, attention should be paid to: 1. Sun-drying the seeds: one week before soaking, choose a sunny day and sun-dry the seeds for 3-4 hours
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