Pests and diseases of sweet corn

2022-03-17

The tiger tiger is the pest of the winter sweet jade seedlings. It mainly includes earth tigers, small tigers and yellow tigers. Such pests damage the leaflets or young leaves of Sweet Corn and even bite the young stems of the seedlings. Prevention measures: artificial 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. 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.

The maggots in Taiwan that cause damage to sweet corn are mainly maggots and Taiwan maggots. The larvae feed on the heart and leaves, affect photosynthesis, impede growth, feed on stems, and tend to wind. 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.

Corn glutinous maize glutinous maize occurs mainly in the tasseling period of winter sweet corn, and it mainly damages male flowers and affects pollination. Control measures: can be sprayed with 3000 times of imidacloprid or 1500 times of proppite.

Maize big spot, small spot disease, and small spot disease are two common diseases of 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. Prevention and control measures: Remove the yellow leaves and diseased leaves from the lower part of the plant to reduce the re-infestation of the bacteria source to facilitate ventilation. Spray fungicide, the agent can be used 25% of 25% Bessor EC or 50% of carbendazim EC 500 times or 65% of zeocin zinc WP.

Sheath blight is a more serious disease of winter sweet corn. Initially, 1-2 episodes of leaf sheaths on the surface of the ground mainly damage the temporal lobe, ears, and grains during the milk ripening period. Prevention measures: Improve cultivation 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. Chemical control. 25% Betul EC can be used 3000 times or 70% thiophanate-methyl WP 800 times or 40% Kodakine SC 500 times.

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