Curvularia maize leaf spot is harmful, what drugs should be used to prevent and control it?

This disease is a fungal disease, which can be prevented and treated with carbendazim, and generally sprayed 2 or 3 times to have obvious effects.

Some pesticides should be chosen, and they should also be prescribed for the right treatment, and some drugs should also be selected to remove bacteria, and pest pests should also be removed, and water and fertilizer management should also be strengthened.

Corn leaf spot can be controlled with thiophanate-methyl and foliar fertilizer spray.

Prevention and control methods: In the early stage of the disease, use 50 kg of dibacterim or 50 methyl tobuzin or 50 antibacterium 2000-3000 times, 600 times of 2116 grain type, 1500-2000 times of Tianda Yufeng, spray 2-3 times, and spray 1 time with an interval of 10-15 each time. Or spray 1-2 times with 50% Pythium tianda 50-100 grams at the end of the heart leaf to the filament stage.

Maize leaf spot mainly damages leaves and bracts. The lesions are irregular, translucent, grayish-white, brown at the edges, and black dots on top, that is, the ascomycetes of the pathogenic bacteria. The pathomycetes are born on both sides of the leaves, scattered or clustered, and are initially buried, with round orifices exposed outside the epidermis.

Ascomycetes are rectangular, nearly rod-shaped to sac-shaped, 35 to 55 microns in size. Ascospores are rectangular, colorless, with 1 septum, slightly constricted at the septum, 1 2 oil droplets in the cell, 14 16 μm in size.

Good afternoon, I'm glad to answer for you, corn bacterial wilt is a vascular disease, the ducts are filled with yellow and bright bacterial mucus, and the exuding mucus can be seen on the cross-section of the diseased plant. Corn can be infected by the bacterium Fusarium wilt of maize at all stages of growth, with typical symptoms being dwarf and wilting. Diseased plants can cause wilt and death at the seedling stage, and if infected at the later stage of plant growth, the plant can grow to normal size.

To prevent the treatment of the disease, copper hydroxide, octachlor, zhongshengmycin, leaf dryazole, and agricultural streptomycin can be sprayed and controlled, and sprayed once every 5-7 days, sprayed 2-3 times.

Spray 1000 times of 75% chlorothalonil wettable powder plus 1000 times of 70% thiophanate-methyl wettable powder or 1000 times of 75% chlorothalonil wettable powder plus 1000 times of 70% mancozeb wettable powder, 500 times of 40% polysulfur suspension, 800 times of 50% compound thiophanate-methyl wettable powder, once every 10 days or so, 1 or 2 times of continuous control.

Hello? For your information: Leaf spot is a fungal disease, there are many commonly used agents, you can use 4000 times dichloride solution to try.

Thank you for your question.

Symptoms: Corn large spot disease and corn small spot disease mainly damage leaves, sometimes also infect leaf sheaths and bracts, small spot disease in addition to the above parts, can also harm the ear. These two diseases are often referred to collectively as corn leaf spot.

The typical symptoms of corn spot disease are small lesions that rapidly expand into long diamond-shaped spots, serious ones up to 10-30 cm long, some spots even exceed 30 cm, and sometimes several lesions are connected together to form irregularly shaped large spots. The lesions are initially water-soaked, quickly turn blue-gray, and finally turn brown dead spots. When the air is humid, black mold can grow on the lesions.

The symptoms of corn small spot disease are characterized by small lesions, generally no more than 1 cm long, wide only between the two leaf veins, nearly oval, the edge of the lesion is darker, and the mu is russet. In addition, the number of lesions is generally higher. The pathogens of maize large and small spot disease are overwintered with conidia attached to the residue of diseased plants, or overwintered with mycelium latent in diseased tissues, and the spore germination in the second year causes the initial infection, and the susceptible plants produce a large number of conidia, causing re-infection.

Prevention and control methods: In the early stage of the disease, use 50 kg of dibacterim or 50 methyl tobuzin or 50 antibacterium 2000-3000 times, 600 times of 2116 grain type, 1500-2000 times of Tianda Yufeng, spray 2-3 times, and spray 1 time with an interval of 10-15 each time. Or spray 1-2 times with 50% Pythium 50-100 grams in the heart leaf end of the heart leaf from the trouser stage to the leaf silk stage.

Summary. 1. In order to prevent corn from being harmed by leaf blight, in the planting process, the flat terrain and well-drained plots should be selected, enough organic fertilizer should be applied, and then the planting mode of wide and narrow rows should be adopted to maintain good ventilation and light transmittance.

Wait a minute, dear.

Dear, hello, the prevention and control method of Yuye rice seedling blight 1, select high-quality, disease-resistant varieties. And choose corn seeds with large and full grains and strong germination potential. 2. Seed disinfection.

Before sowing, 10 grams of fludioxonil suspension seed coating agent were mixed with water and 100 millilimb buried in blind, 5 kg of seed dressing, and 40% clomycoline 600 times liquid or 70% methyl tobuzin 500 times liquid soaked for 40 minutes, dried and sown.

Pro-corn leaf blight and agricultural control:

Dear, I've seen your**.

Wait a minute, dear.

Can such corn seedlings still be cured?

1. In order to prevent corn from being harmed by leaf blight, in the planting process, the plot with flat terrain and good drainage should be selected, and the organic fertilizer should be applied sufficiently, and then the planting mode of wide bridges and narrow rows should be adopted to maintain good ventilation and light transmittance.

1. In order to prevent corn from being harmed by leaf blight, in the planting process, the plot with flat terrain and good drainage should be selected, and the organic fertilizer should be applied sufficiently, and then the planting mode of wide bridges and narrow rows should be adopted to maintain good ventilation and light transmittance.

2. In the early stage of the occurrence of spraying pesticide jade rice leaf blight, you can use 500 times of 65% zebze, 500 times of 64% alum, or 300 times of 14% copper ammonia aqueous solution, and spray it once every 7-10 days and spray it 3-4 times in a row to alleviate it.

Dear, you can take a few more shots**.

I'm giving you a summary of the experience.

How to prevent it.

Ask about custom messages].

In the process of breeding corn, you should apply fertilizer frequently, follow the principle of light seedling fertilizer, heavy ear fertilizer, and supplemental flowering fertilizer, so as to provide nitrogen, phosphorus, potassium and various trace elements for the plant.

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Corn leaf spot.

Also known as stripe rust, leaf spot, leaf blight, coal strip disease, etc.

The disease mainly affects leaf sheaths, leaves, and envelopes. The leaves of infected plants appear water-stained blue-gray spots, then expand to the sides to form dark brown edges with blue-gray spots in the middle.

Generally 20-25 degrees, high humidity, high density, easy to get sick.

Prevention and control can be alternately sprayed with carbendazim, thiophanate-methyl, chlorothalonil, mancozeb and mancozeb in the early stage of the disease, and re-sprayed 1-2 times a week.

Spray 75% chlorothalonil wettable powder 1000 times plus 70% thiophanate-methyl wettable powder 1000 times or 75% chlorothalonil wettable powder 1000 times plus 70% mancozeb wettable powder 1000 times, 40% polysulfur suspension 500 times, 50% compound thiophanate-methyl wettable powder 800 times, every 10 days or so, continuous prevention and control for 1 10 days.