Li Xiaoming, a reader of Qiujiadian Town, Tai'an City, said: As a result of the recent rain, his homegrown ginger rotted. Want to know how to prevent it? The newspaper specially invited the head of Laiwu City Plant Protection Station Lv Hua to write a manuscript reply. This year, ginger growth in our province is generally better than last year. This is positively related to the price of ginger and Jiangnong's high enthusiasm for management and investment. However, since the beginning of summer, the rainfall has increased and the temperature has increased, especially since the heavy rains in the province on July 12th, and continued until late August. The temperature is still high, combined with continuous rainfall, high temperatures, and high humidity. The conditions are extremely conducive to the occurrence of diseases. According to surveys, ginger ginger rickets occur in our province. The incidence of diseased plots is generally 10% to 20%, and severe cases are more than 50%. I. Symptoms of the disease The symptoms of ginger are the symptoms of the whole plant. As long as the plants are attacked by the bacteria, the stems and leaves or the roots will show symptoms. The pathogenic bacteria first invade the stem base and rhizomes of the ground. In the early stages of disease, the leaves are shriveled, drooping and dull, and then the leaves turn yellow from bottom to top. The diseased plants begin to appear dark purple at the beginning of the base and become water-stained yellow-brown, like boiling water. In the same way, the basal or root part of the diseased stem can be seen as transverse or longitudinal, and the vascular bundle becomes brown, commonly known as “black eyeâ€. Extrusion by hand shows that the concentration of fouling white bacteria overflows from the vascular bundle, which is an important basis for diagnosing the disease. , Ginseng and stems at the junction of water-like corrosion, odor, after the internal tissue gradually soften and rot, emitting odor. Second, prevention and control measures Practice has proved that the prevention and control of ginger borer disease should implement comprehensive prevention and control measures, should be based on agricultural control measures, supplemented by chemical control, to cut off the transmission route, as far as possible to control the occurrence and spread of the disease. 1, rotation for change. Ginger rot pathogens can survive in soil for more than 2 years. Rotation for crop rotation is the main way to cut soil bacteria. In particular, if there are conditions, it is necessary to be separated by more than 3 to 4 years before planting ginger. Crop or onion, garlic rotation, can not be rotated with tomato, eggplant, pepper, potato and other solanaceous crop rotation. 2, strict selection of disease-free ginger, pharmaceutical soaking, put an end to ginger-borne disease. Before the harvest of ginger, it can be strictly selected in the disease-free ginger field, single collection, and the ginger cellar can be disinfected in time. Ginger rot disease areas should be transported from the disease-free zone ginger seed. Before germination, use 20% Longke (Thiococcus copper) suspension agent 500 times dip ginger for 15 to 30 minutes, can also be used 3% Kecong 600 to 800 times liquid dip ginger for 1 to 2 hours. 3, selection and site preparation. Jiang Tian should choose high-desert, well-drained plots. After deep-dumping, the Mushi lime should be 100-150 kilograms. The ground should be leveled when the site is set. The ginger ditch should not be too long. In order to prevent the accumulation of water in the rainy season, drains should be installed in the field. 4, apply net fat. Fertilizers used in Jiangtian shall be free of pathogens, and must not be used to treat diseased ginger, diseased plants, or soils containing bacteria to compost soil. It is necessary to use bio-organic fertilizers, increase the application of phosphorus and potassium fertilizers, and apply formula fertilization. According to experimental studies in recent years, the growth period Appropriate use of calcium fertilizer can increase the disease resistance of ginger. 5, pouring water. Jiangtian uses unpolluted well water for irrigation and should use plastic hoses for irrigation or drip irrigation so that the water can bypass the onset. In the early stages of disease, it is necessary to reduce the number of watering or stop watering to control the spread of the disease. 6. Eradicate the central diseased plant in time. After the diseased plant is found in the field, the central diseased plant should be removed in a timely manner and the healthy plants within 0.5 meters from the surrounding area should be removed. The infected soil should be excavated, and lime should be applied in the diseased cavities, or the cavities should be filled with 3% Kecong 600 times, and then clean. Sterile soil is buried, and rotten ginger seedlings, rotten ginger pieces, rotten ginger soil are deeply buried or treated with drugs. 7, early onset of drug control. In addition to ginger seeding and sowing of ditch from the start of ginger sowing, it is necessary to conduct chemical control at the early stage of disease. The antimicrobial efficacy of the biocides Kechuangkang and Longkei was all over 80%. The use method was: 30% Kezikang WP 600 to 800 times or 20% Longkei (Bipylon) Suspension 600 times. Liquid 0.5 kg per strain, every 7 to 10 days irrigation, continuous irrigation 3 to 5 times.
Leaf Gelatin,Gelatin Sheet,Bulk Leaf Gelatin
Fenghua Jade Motor Co., Ltd. , http://www.bosswholesaler.com