1 the prevention and treatment of retting chili seedling death
Reason: too much due to the monsoon rain, soil nutrients, soil air content less, cause the deterioration of root respiration, coupled with the long rain BaoQing, root absorption capacity is weak, cause water imbalance, is a major cause of chili retting root seedling death.Prevention and control measures: crumbing LiShang, drainage JiangZi.Submerged vegetable patch should be ruled out as soon as possible the field water, empty ground, reducing the time of flooded stains, and relieve suffering.Serious to flooded, root dead chili to timely clean pastoral, soil preparation replay or shift.After the rain watering the garden., if the summer hot pepper LaoHai shall promptly in the rain with well water to reduce the soil temperature, relieve the disease in the rainy season, can play a considerable role.To strengthen the management.Although some submerged the heavier, the root did not die of chili, can be appropriately by cut off part too dense branches and leaves on the ground, or use the sun-shade net short-term appropriate shade, prevent the rain sunny exposure, reduce evaporation, prevention of physiological disorders cause plant wilting.Cultivating soil.Cultivating ridging in time, so can promote root growth, and good drainage, prevent lodging.Foliar fertilizer.If hot pepper in fruiting flooded, should be heavy ShiBao fruit weight.For urea liquid foliar fertilizer available 0.3% 0.5% or 1% potassium dihydrogen phosphate solution, spray once every 3 to 5 days, even three times.To promote chili after flooding fast new root, can also adopt the way of root repair spray fertilizer plus foliar fertilizer fertilizer.Spraying.Appropriate spraying love 6000 times liquid or plant treasure 7000 times liquid, in order to improve the plant disease resistance.Prevention and control of agricultural streptomycin can spray 200 PPM.Above agent spray once every 5 to 7 days, even three times.
2 prone to disease prevention
Disease in chili pepper disease waterlogged after large area easily happen, so to be prone to diseases of pollution-free prevention and control work.
2.1 the type of main diseases and symptoms
2.1.1 anthracnose disease is the main performance of the fruit fruit surface came first wet, brown stain shape round or irregular form of disease spot, slightly concave, which is about 1 cm in diameter, surface producing black or orange red small grains.Conditions lead to fruit dry shrinkage, rupture, hanging like a tiger, also known as "tiger skin disease".And surface when it's wet and often overflow dope, red fruit perishable loss, hung Yu Guozhi.High temperature and high humidity conditions are more likely to come on and spread very fast.
2.1.2 virus disease virus disease symptoms such as etiolation, Mosaic, necrosis and deformity of four kinds of symptoms.Light person appear Mosaic, serious when symptoms appear at the same time, lead to serious consequences such as leaves, falling flowers, fruit, light person lose 20-30%, serious loss during 50-60%.
2.1.3 soft rot Soft rot main harm pepper fruit, especially the Chinese olive, disease of fruit first present water dark green color, then brown soft rot, the pulp internal decay, white fruit, the fruit drying shrinkage after filtration, leaving only pale skin hanging on the branches, with a stench, slightly when the external force is easy to fall off.
2.1.4 pepper blight disease mainly fruit, leaf and stem, especially the stem base, and disease from stem base, more serious when appear black long spot, disease spot green, long for 3 to 5 cm or longer, the disease health junction, disease spot slightly concave or constriction.Tip on produce suborbicular or just like soaked in water, a serious illness, whole leaf soft rot, after dying, visible when it's wet sparse gray mold.
Disease prevention and control of 2.2
Selection of resistant varieties.Disease-resistant seed can effectively prevent disease occurs, and is an important method of preventing hot pepper seedling death;Disease-free seedling cultivation.Disease-free seedling can effectively avoid or delay the chili rates;Control the pathogenic bacteria.Implement the rotation alternate husbandry, reduce the probability of soil spread diseases, strict disinfection for seed and seedling nutritional soil;Scientific and effective management, enhance the plant resistance.In the process of requirements to the commune, basal, without no rotten organic fertilizer, fertilizer according to the principle of repeated small and fast filling fast row.Field water is no more than 40 minutes, otherwise easy to cause flooding;Do a good job in the field is clean, reduce the disease infection again.To remove the field and field ridge weeds, found that strain should be out in a timely manner, and out of the deep field outside, but also around the strain disinfected;Chemical control methods.Prevention and control of anthrax, with 55 degrees warm water before planting seed treatments for 30 minutes or use 50% carbendazim wettable powder 500 times liquid seed treatments.Found after strain can choose 80% of anthrax f the wettable powder 800 times liquid, or the use of chlorothalonil 75% wettable powder 500-600 times liquid, also can choose mancozeb 70% wettable powder 400-500 times liquid spray, spray 7-10 days time, 3 times even;Chemical control method of the soft rot in a more timely after the rain spraying 72% agricultural streptomycin wettable powder 4000 times liquid, can kill or 77% wettable powder 500 times liquid, or 50% succinic acid copper wettable powder 500 times liquid, such as spray once a week, continuous spray 3-4 times;Virus disease prevention and control of chemical method, with 10% trisodium phosphate before planting seed wash sprouting in half an hour, to passivation.Or use the virus K or A spirit or A virus or A virus net 400-500 times liquid used in the early onset, or fungus poisonous clear 200-300 times liquid spraying, spray once A week, about 3 times in A row.0.1% potassium permanganate solution and 1% calcium superphosphate to Mosaic virus also to have certain control effect.For strain with 50% armor frost copper wettable powder 500-600 times liquid, 60% DTM wettable powder 500 times liquid, 75% chlorothalonil wettable powder 800 times liquid spray control, such as spray 7-10 days time, 2 to 3 times in a row, serious when spray once every five days, even three or four times.
