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How do you control striped flea beetles in rapeseed cultivation?
What harm do striped flea beetles cause to rapeseed? How do you control striped flea beetles in rapeseed? Please explain the methods. The harm of striped flea beetles to rapeseed: The striped flea beetle is commonly known as the cabbage flea and soil flea, and its larva is called the white maggot. This insect can not only fly but is also good at jumping, making it difficult to catch on the leaves; when disturbed, it jumps to the ground or to field-edge ditches, ...
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Which herbicides make it impossible to plant rapeseed afterward?
After using which herbicides can rapeseed not be planted? How long must the interval be before rapeseed can be planted? Please explain. As reference, herbicides harmful to rapeseed include the following: after using Pursuit (imazethapyr, imazethapyr acid) the interval must be 40 months before planting rapeseed; after using chlorimuron-ethyl (chlorimuron, chlorimuron-ethyl)...
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What are the common pests during rapeseed cultivation?
What are the common pests of rapeseed? How are these pests controlled? Please advise: the common pests of rapeseed are mainly rapeseed aphids and imported cabbageworms. For control methods, refer to the following list: Rapeseed aphid control method: In lightly affected fields, physical control can be used, that is, evenly place 10 yellow sticky traps per mu of vegetable field to trap and kill aphids...
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How do you prevent and control rapeseed viral disease in rapeseed cultivation?
What harm does rapeseed viral disease cause? How do you prevent and control rapeseed viral disease? Please explain. Viral disease is one of the main diseases of rapeseed. Affected plants reduce yield by about 20%, and in severe cases by more than 70%. It is generally more susceptible in years with little rain or in areas where vegetables are often grown nearby. Methods for preventing and controlling rapeseed viral disease: ...
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How to control sclerotinia rot in rapeseed cultivation?
What are the harms of rapeseed sclerotinia rot? How to control rapeseed sclerotinia rot? Please give guidance. Harms of rapeseed sclerotinia rot: In the seedling stage of rapeseed, sclerotinia lesions mostly occur at the junction of the root and stem near the ground, forming reddish-brown spots, which later expand and turn pale white, with the tissue becoming wet and rotted, and white flocculent mycelium growing on the surface. After the lesions encircle the stem, ...
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How can fertilizer burn be prevented in rapeseed cultivation?
How can fertilizer burn be prevented in rapeseed? Please explain the methods. To prevent fertilizer burn in rapeseed, you can refer to the following 4 methods (for reference): 1. Use the layered application or full-layer deep application method: according to the planned crop rotation for the year and the total amount of fertilizer, apply it all at once during deep plowing, adopt formula fertilization technology, and master the three elements of nitrogen, phosphorus, and potassium...
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What are the common weeds in rapeseed cultivation?
What weeds occur in rapeseed cultivation? What herbicides can be used to control them? An introduction: I. Main weeds in rapeseed fields. Main weeds in dryland rapeseed: cleavers, corn spurry, speedwell, small goosefoot, flixweed, shepherd's purse, wallflower, Cardamine, bluegrass, wild oat, knotgrass, white campion, thistle, small bindweed, etc.
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What herbicide is used for pre-emergence weed control after sowing rapeseed?
What herbicide is used for pre-emergence weed control after sowing rapeseed? Please give an introduction. After sowing rapeseed and before seedling emergence, clomazone can be used for pre-emergence weed control. Clomazone can control a variety of annual grass weeds and broadleaf weeds, and is mainly used in rapeseed transplanting fields, where soil closure treatment is carried out before rapeseed transplanting. Clomazone is usually...
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What does "flowers but no seeds" mean in rapeseed cultivation?
What is rapeseed "flowers but no seeds"? What methods are there to prevent and control it? Please explain. Rapeseed "flowers but no seeds", also called stunted sterility, means that from the onset of the disease to maturity, the plant keeps flowering continuously but cannot set seed normally. The main cause is a physiological disease caused by growing rapeseed on boron-deficient soil, mainly occurring in Brassica napus varieties, but in recent years it has also been found in Brassica rapa rapeseed. After the disease occurs, yields generally drop by 20% to 30%, and in severe cases there is even almost no harvest, making it a problem worth attention in rapeseed production.
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What should be done about stunted seedlings during rapeseed cultivation?
What should be done about stunted rapeseed seedlings? What methods can be used to prevent and control them? Please explain the symptoms of stunted rapeseed seedlings: after transplanting and recovering from transplant shock, during the early stage of field growth, stunted seedling symptoms sometimes appear, such as reddening and yellowing leaves, curled leaf centers, slow or halted growth, and poor growth and development. To prevent and control stunted rapeseed seedlings, targeted measures should be taken based on investigating the causes of the stunting...
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