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Control Methods and Technical Key Points for Clubroot of Rapeseed
How to control clubroot of rapeseed? Please explain. Clubroot of rapeseed occurs on the roots. The pathogen generally invades through root hairs or young roots, forming galls on the main root or lateral roots. It is commonly known as "big head disease." In the early stage, the surface is smooth and white; later it turns brown, rough and cracked. It is easily infected by other pathogens and rots...
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What are the key management techniques during the flowering stage of rapeseed?
How should rapeseed be managed when it blooms? Please note that during the flowering period of rapeseed, the following methods can be used for management: 1. Control aphids and spray boron fertilizer on the leaves. At present, controlling aphids is beneficial for field operations and effectively controlling the damage to rapeseed by aphids later on. The pesticide should be selected from those with stomach, contact, or fumigant action such as "..."
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How to fertilize rapeseed during the pod stage in Jiangxi? A detailed guide to practical methods
How to fertilize rapeseed during the pod stage in Jiangxi? Please guide and explain. The pod stage of rapeseed refers to the period from the start of flowering to maturity, including the flowering stage and the pod development stage. During the flowering stage there is only a small amount of vegetative growth, with reproductive growth being dominant. Proper field management during the flowering and pod-setting stage of rapeseed is the final key to achieving high yields....
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Key Technical Points for Spring Field Management of Rapeseed
How should rapeseed fields be managed in spring? Please advise. The bolting stage of rapeseed is a period of vigorous growth in both vegetative and reproductive development, known as "spring rapeseed fierce as a tiger." Due to the low temperatures and low rainfall in early spring this year, the growth and development of rapeseed has been slow, with weak growth vigor. To promote stable spring growth of rapeseed, coordinate vegetative growth and...
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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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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 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 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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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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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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