Garlic soft rot is a bacterial disease, and it is also one of the major diseases on garlic. It has a greater impact on the yield and quality. Soft rot of garlic is prone to develop under conditions of low temperature and high humidity, especially in soils with low-lying terrain, poor drainage, and high groundwater levels. Strengthen field moisture management, keep the soil dry, can ease the disease. Rainy years and droughts are generally mild. The onset began in November and began at the margin of the leaf margin or midrib, with yellow-white streak formation along the midrib. When the humidity was high, the diseased part appeared yellow-brown soft rot and yellow pus appeared. Plants first attacked from the lower leaves and gradually expanded toward the upper leaves. Only 2-3 leaves were slightly green in the later stages, and the whole plants were dead with yellow leaves.
Prevention. The principle of comprehensive prevention and control should be adhered to for the soft rot of garlic to prevent the onset of disease. The main measures are as follows:
1, choose the best garlic, to detoxification, disease resistance, pest-free garlic best.
2, should choose the flat terrain, drainage and irrigation convenience, rich in organic matter, soil, strong ability to maintain fertilizer and water, and the former planted garlic for non-garlic garlic. And fine soil preparation, so that the Panasonic real, in order to block the source of disease and avoid the conditions of the disease.
3, full use of phosphorus, potash fertilizer, high-quality organic fertilizer, cake fertilizer, promote healthy growth of seedlings, improve plant disease resistance, in order to reduce the occurrence of physiological diseases.
4, timely sowing, usually in early October before sowing is appropriate, after sowing water, watering, after the cover film, in order to improve the temperature, protect the drought, promote garlic as soon as possible germination, emergence, health.
5, pharmaceutical control. Pharmacy control should be done as follows: (1) Seed garlic treatment: Before seeding, use 2.5% of the seed weight of 0.25%. Shiloh's suspension seed coating agent can coat and inactivate garlic pathogens; 50% carbendazim can also be used. Or 77% can kill or 77% tannin wettable powder seed dressing, seed dressing method is 100 grams of each agent watered 5 kg, can be seed dressing 50-75 kg, evenly mixed and dried after sowing. (2) Soil treatment: This method is applicable to the land where soft rot has occurred. It can be sprayed with 77% tannin wettable powder 600 times liquid to sow the ditch. 100 kg per acre of spray liquid, sow after spraying; or with copper sulfate, quicklime The ash is mixed in a ratio of 1:1:100 and is applied to the garlic ditch. (3) Chemical control: Before or at the beginning of onset, spray 72 kg of agricultural streptomycin 3000-4000 times, 47% of Garnett 750 times, or 50 kg of 50% dexamethasone 1000 times before spraying. Spray every 5-7 days, depending on the condition for continuous treatment 2-3 times. Focus on the diseased plants and the surrounding plants spray, pay attention to the plant stem base. If diseased plants are still present after the above measures are taken, 72% of agricultural streptomycin WP may be used in a timely manner 400 times, or 77% of WP can be killed 500-800 times 50 kg per acre spray, every 7-10 Spray once a day, spray even 2-3 times; or use neophytin 3000-4000 times, or 50% carbendazim, 75% chlorothalonil wettable powder 500-800 times, or 50% methyl Topozin WP 600-1000 times irrigation rhizome.
The appearance is tan, and the cork is red-brown at the flaking; there are intermittent stripes on the branches, nodules are enlarged, and the shape is like a bead. Most of the hard and delicate roots and fibrous roots are born, and some surfaces are smooth and smooth, such as stalks. It is commonly known as "crossing the river branches" or "crossing bridges"; there are brown scales on the upper part, and there are residual stems or petioles that have not been cleaned at the top. The quality is firm and hard, the section is irregular, the skin is dark brown, the wood is golden, the rays are cracked, the central pith is red and yellow, and occasionally hollow. Odorless, very bitter taste, chewing saliva can be dyed red and yellow. It is better to use fat, beaded, solid, red-yellow, no residual stems and fibrous roots.
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