Okra harmless treatment technology

Okra is a new type of health vegetable with higher nutritional value. Okra harvested almost every day after the results, chemical control is difficult to achieve product quality, safety and pollution-free. To this end, the characteristics of the occurrence of Okra pests and pests and the production of pollution-free agricultural products. Okra pest control measures are as follows: First, the selection of disease-resistant seed, good seed treatment. Seed disinfection sterilization methods such as soaking warm soup, soaking seed, high temperature treatment. Among them, the method of soaking seeds with warm soup is simple, low-cost, and has good bactericidal effect. Soaking in warm soup is generally done by wrapping the seeds with gauze before sowing (only half a bag is kept, keeping the seeds loose). The seeds were soaked in cold water for 10 minutes, then soaked in warm water of 52-55°C for 10-20 minutes, and rapidly stirred with wooden sticks to evenly heat the seeds. Second, fall winter irrigation. H. armigera and other insect pests weighed heavily in the plots. When harvested, the residues and leaves were completely removed. Autumn tillage and winter irrigation were carried out, which effectively reduced the population of insect populations and significantly reduced the occurrence and harm of insect pests in the following year. Third, the use of insect network coverage. Using insect nets to cultivate vegetables can basically avoid the harm of medium and large pests and reduce the use of chemical pesticides. Select pest control network, should pay attention to choose the appropriate specifications, generally considered more suitable for the 20-32 mesh, wire diameter 0.18 mm, width 1.2-3.6 meters, white. During the isolation period of the insect nets, the nets should be uncovered as little as possible to prevent the adults from flying in; timely removing the egg pieces produced on the net yarns so as to prevent the young larvae of the eggs from drilling into the nets after hatching. Fourth, trapping and killing adults. For pests such as Helicoverpa armigera, Spodoptera litura, etc., frequency-vibrancy insecticidal lamps, sweet and sour vinegar pots, and poplar twigs can be used to trap adult insects. It is also possible to plant tsetse and corn traps to trap and kill adult worms and reduce the amount of eggs laid by adults. For locusts and other pests, use their yellowing habits, use the Lin Mao board, or apply a layer of viscous gelatin on a yellow plastic sheet, or apply a layer of engine oil or syrup and insecticide on the yellow cardboard. Trichlorfon, etc., are suspended at a certain distance and hung about 70 centimeters high, enabling winged crickets and other "self-casting nets" to exterminate insects without polluting the environment. Fifth, artificial control. According to the characteristics that the Spodoptera litura produces eggs spawning at the back of the leaves, bifurcations of the veins, and clusters of newly hatched larvae, the removal of the leaves of the egg mass and larval colonies during the agricultural operation can reduce the population density significantly. When the sporadic splinters occur, the aphids on the back of the leaves can be wiped off or the shoots removed. Six, chemical control. It is important to take early control of pests as early as possible. Biological pesticides and high-efficiency, low-toxicity and low-residue pesticides should be used to spray pesticides at the peak stage of young insects of pests. The concentration and frequency of pesticide application must be strictly controlled, and the pesticide should be harvested in accordance with safety intervals. 1, Spodoptera litura. It should be used during the peak of egg hatching to the younger larvae. Chemicals may be selected from Oxygen No.1, Bacillus thuringiensis WP, 5% chlorfenuron (Ipoquat), 5% flufenoxur Emulsion (calcium), 20% tebufenac suspension (MI), 15 % Emulsion suspension concentrate, 10% pestonitrile emulsion (exhausted) and other highly efficient, low toxicity, low residue pesticides. If the pest is overwhelmed during harvesting, it can only be used for 15% suspension of 3750 times liquid, or 20% tebufenozide suspension for 1500-2000 times. The effect can reach over 90%, and it can also treat cotton bollworm. When spraying, the fog should be fine and the spraying should be even and thorough. The safety interval is 3 days. 2, cotton bollworm. To catch the hatching of the egg to the second instar larvae during the prosperous period, that is, control of larvae before fruit application. In the early stage of growth, 5% flufenoxur Emulsion (Cai Ke) 1500-2000 times, 48% chlorpyrifos EC (Lottpen) 1000 times, 50% phoxim EC 1000x, etc. can be used. Tebufenozide control. 3, locusts. Can be used 10% imidacloprid wettable powder 1500 times or 3% acetamiprid EC 2000 times spray control. 4, damping-off and blight. Seeds soaked in fresh water for 3-4 hours before sowing, and soaked in 500-fold potassium permanganate for 15 minutes, then washed and dried after sowing. After emergence, spray with potassium permanganate 800-1000 times (thin diluted first) spraying 3 times every 7-10 days. During the preparation and spraying of potassium permanganate, constant stirring is needed to dissolve all the drug particles, and they are used together with them. Seedling stage use concentration can not be too high, seedling spray 5 minutes after spraying with fresh water or flushing leaves, spraying time should be around 9:00 or after 4 pm. 5, virus disease. This disease is transmitted by locusts. In addition to the prevention and control of locusts in time, it can be used in the early stage of the disease, with 20% hydrochloric acid morpholinium copper wettable powder (virus A) 500-800 times solution or 10% mixed fatty acid AS (83-resistant antibody). 100% liquid foliar spray control. Every 5-7 days, spray 3-4 times.

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