What causes corn stalk tears?

The corn stalk crack is mainly due to the following reasons: corn bacterial stem rot, light yellow water stains with different regular shapes, invade the stem through the leaf sheath, soften the ulceration and cracking, sticky and have a special odor. Reason, 1Seeds are not resistant; 2.

soil carriers; 3.High temperature and humidity are conducive to the onset of the disease. Partial application of nitrogen fertilizer, poor drainage aggravates the disease.

Copper hydroxide, octylamine, agricultural streptomycin + potassium dihydrogen phosphate spray control are selected, and the prevention and control is repeated again at an interval of 5-7 days.

Under the conditions of severe drought in the early stage, after the catastrophic weather and heavy rainstorm, the vegetative growth of maize at the flare stage was too fast, and the dry matter of the straw was too small, so the lodging resistance was poor.

The fertilization structure is unreasonable. Too much nitrogen fertilizer and insufficient potassium fertilizer caused the corn to grow too fast in the early stage and poor lodging resistance in the later stage.

The lodging resistance of the seeds themselves is different, resulting in inconsistent lodging resistance.

2. Countermeasures.

Vigorously promote the formulation of fertilization, give crops a reasonable and balanced nutrition, stabilize nitrogen, reduce phosphorus, increase potassium, promote the application of organic fertilizer, fertilize soil fertility, increase organic matter content, promote the growth and development of crops, enhance the stress resistance of crops, and coordinate the vegetative growth and reproductive growth of maize to the greatest extent. Cultivate strong seedlings and strive for high and stable yields.

Corn (Zea Maysl.).) is an annual herbaceous plant of the Poaceae family[1]. It is also known as bud grain, bud rice cob, maize, pearl rice, etc. [2].

Native to Central and South America, it is an important food crop in the world and is widely distributed in the United States, China, Brazil, and other countries.

It is likely that there was a severe drought in the early stages. Anaphase. It was caused by catching up with the rainy day.

Corn stalk base rot.

First, the prevention and control methods:

In view of the current bacterial stem base rot on corn, the recommended agents are: 46% copper hydroxide, 3% chunleimycin, 3% mesomycin, 40% zinc thiazole, 20% zinc thiazole, 30% copper thiazole, 50% chlorobromoisocyanuric acid (not mixed with organophosphorus % thiamethoxone, etc.).

2. Corn management fertilization and planting technology

1. Scientific fertilization: corn needs sufficient nutrients in the growth process, and when planting corn, it is necessary to apply water-soluble fertilizer at the jointing stage of the jasmine plant, which can effectively help corn rooting, fruit expansion, yield increase, quality improvement, prevention of premature aging, etc., with fast effect and good effect.

2. Cultivating and pulling weeds: When planting corn, you need to use a hoe to cultivate the land 2-3 times to make its roots grow, and to pull out weeds in time to avoid weeds and corn robbing nutrients.

3. Reasonable watering: corn likes water but is not resistant to waterlogging, when planting corn, it needs to be watered once a week when the rainfall is less and the soil is dry.

Under the conditions of severe drought in the early stage, after the heavy rainstorm in disastrous weather, the vegetative growth of maize at the flare stage was too fast, and the dry matter of the straw was too small, so the lodging resistance was poor.

The fertilization structure is unreasonable. Too much nitrogen fertilizer and insufficient potassium fertilizer caused the corn to grow too fast in the early stage and poor lodging resistance in the later stage.

The lodging resistance of the seeds themselves is different, resulting in inconsistent lodging resistance.

2. Countermeasures.

Vigorously promote the use of formula fertilization, give crops a reasonable and balanced nutrition, stabilize nitrogen, reduce phosphorus and increase potassium, promote the application of organic fertilizer, cultivate soil fertility, increase organic matter content, promote the growth and development of crops, increase the stress resistance of crops, and coordinate the vegetative growth and reproductive growth of corn to the greatest extent. Cultivate strong seedlings and strive for high and stable yields.

It's too hot, and the manuscript base will also burst into the honor key!

On the other hand, corn kernel rot, which is particularly disadvantaged by pathogens, overwintering on seed disease residues, may also lead to such phenomena.

It has a certain relationship with simple corn varieties and management techniques. For example, in the corn filling period, there is a drought or insufficient fertility in the early stage, and the grain filling is blocked, and the later stage is called to rain or fertilizer, and the corn kernel will expand again, so that the seed coat will be ruptured, and the grain will burst.

Corn sheath blight.

Excessive planting density, poor field ventilation and light transmission, excessive nitrogen fertilizer, high humidity, continuous high temperature and rain are prone to disease. It is mainly harmful to corn leaf sheaths and fruit spots that are round or irregularly shaped, light brown, water-soaked, the boundary between the disease and the healthy part is blurred, and the lesions are healed into larger moire patches, the middle part is light earth yellow or withered grass white, and the edges are brown. The stalks of the diseased plants are soft and the tissues disintegrate, causing stem base corruption.

Sclerotia overwinters in soil and can infect maize the following year.

It can be sprayed with 30% Aimiao EC (benzoconazole, produced by Syngenta Crop Protection **** in Switzerland), 25ml per mu, and 50 kg of water. Or spray 250 grams of 10% Jinggangmycin soluble powder per mu and 50 kg of water. The focus of the spraying is on the base of the corn to protect the leaf sheath.

It should be bacterial stem rot, and in the case of bacterial wilt, it should be obvious lesions in the roots and base of the stem. It is even accompanied by the occurrence of sheath blight.