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Winter sweet corn pest control
In recent years, winter sweet corn has been contiguously planted in the mountains, but pests and diseases have seriously threatened the production of sweet corn, which has become a major obstacle to increase production of sweet corn. The winter planting of sweet corn has provided abundant foodstuffs for some pests and has become the main wintering breeding site for pests. At the same time, it has also provided favorable conditions for some pathogens, and the diseases have spread and spread. In addition, the winter sweet corn is affected by the climate of the early rain and drought, often causing serious occurrence of pests and diseases. First, the tiger tiger is the winter sweet corn seedling pests, mainly land tigers, small tigers, yellow tigers. Such pests damage the leaflets or young leaves of sweet corn, and even bite off young shoots at the base of seedlings, resulting in the lack of seedlings and ridges, which seriously affect the whole seedlings. Prevention measures: 1 manual capture. In early morning, the burrowing of the larvae is carried out by the earthworms around the broken seedlings of the sweet corn or along the damaged plants that remain in the caverns. 2 poison bait trapping. Mu with 90% dipterex crystal 50 grams, dissolved in warm water into 250 milliliters of liquid, mixed with sauteed peanut bran uniform, scattered around the corn in the evening. Second, the locusts in Taiwan that cause damage to sweet corn by crickets and giant salamanders are dominated by giant salamanders and Taiwan monks. Larvae eat the heart and leaves, affect the photosynthesis, impede the growth, feed stems, easy wind and wind; eat the male and female ear, reduce the pollination rate, but also directly feed the grain. Control measures: Apply pesticides during the big bell mouth period. The agent can use 3% Milur Granules (1kg per mu) or 98% Bataan wettable powder (50g per mu) or 90% trichlorfon crystals (150g per mu, dissolved and diluted with warm water) Sand dessert leaf appetizing. Third, corn glutinous maize glutinous rice mainly occurs in the tasseling period of winter sweet corn, mainly male flowers, affecting pollination. The individual locust is small and breeds quickly, so it cannot paralyze. Control measures: 3000 times of imidacloprid or 1500 times of propadiene spray. Four, corn leaf spot, small leaf spot, and small spot disease are common diseases in winter sweet corn. In severe cases, the leaves can die, resulting in reduced yields. The main damage leaves, but also invade leaf sheaths and loquat leaves. Both diseases are prevalent at the time of booting and heading, and low-lying areas are often densely planted in shaded lands and continuous cropping sites. Control measures: 1 Remove the yellow leaves and diseased leaves from the lower part of the plant to reduce the bacteria source for re-infection so as to facilitate ventilation. 2 spraying fungicide, pharmaceutical agent can be used: 25% Betul EC 2500 times or 50% carbendazim EC 500 times or 65% zein zinc WP 1000 times. Five, sheath blight sheath blight is a serious disease of winter sweet corn. The first 1-2 leaf sheaths on the ground are mainly affected by the temporal lobe, ear, and grain during the milk ripening period. Soil masses, partial nitrogen fertilizers, low-lying land, and plants with closed vegetation, unventilated and poor light transmission all contribute to the disease. Control measures: 1 Improve the cultivation and management techniques. Pay attention to the drainage of drains and apply organic fertilizer. The application of nitrogen fertilizer should be sooner rather than later, and it should be less than appropriate, and appropriate potassium fertilizer should be added to improve the disease resistance of the plant. 2 chemical control. 25% Betul EC can be used 3000 times or 70% thiophanate-methyl WP 800 times or 40% Kodakine SC 500 times.