First, cotton seedling period "a spray and more governance" prevention and control ideas
Insect pests in cotton seedlings mainly include roundworms, aphids (star spiders), and thrips (damage to the top of the cotton plants to form "headless cotton"), and the diseases mainly include wilt disease, blast disease, blight, and damping-off. Root rot disease, etc., therefore, cure insects, prevent disease, promote seedling growth is the focus of cotton seedling management, but also a key measure to build a high yield shelf. Taking a mixed medication, the “2+1+2†method with one spray and multiple treatments has a significant effect. Its main idea is:
1. For pest control, two pesticides with different components and different modes of action are used. One type of bactericide is added to prevent disease, and two different types of nutrient regulators are added to strengthen the seedlings.
2. For the prevention and treatment of diseases, choose two different fungicides pesticides, add one insecticide (or acaricide), add two kinds of nutrient regulators. The available dosage and dosage (based on the 12.5kg sprayer).
Second, cotton seedling period "a spray and more governance" prevention and control methods
1. Insect remedy and warts medication: (1) cure warts medication. 40.7% 20 ml of Lance, with contact, stomach poisoning, fumigation, and good effect when applied at low temperatures. 3% acetamiprid 20 ml, long duration, good effect when applied at high temperatures, should not be applied at low temperatures. 2.5% pass kill 12 grams (imidacloprid, butylthiovir complex), fast effect and long duration of effect. (2) The use of drugs for the treatment of warts: 20% of furazolidone (15 grams), which has contact and penetration effects, is effective for all stages of warts, and has a long duration. It also has a cure for aphids. 2% avermectin 10 ml, with stomach poisoning, contact, penetration, the effect is slow, longer effective period. 50% Po Road 10 ~ 15 grams, with a suction, fumigation effect, for earthworms, whitefly, aphids, leafhoppers, scale insects are effective. 73% Krypton 5ml, with a contact killing effect, is effective for all phases of ticks, also effective for aphids, whiteflies, thrips, and scale insects. However, under conditions of high temperature and high humidity, high doses may cause phytotoxicity to seedlings and young leaves, and care should be taken. Throat horses generally do not need to be controlled alone, and the combined use of drugs in the prevention and control of other pests can generally be simultaneously controlled.
2. Prevention and treatment of diseases and diseases: 50% carbendazim 25 grams, has a good effect on a variety of diseases, but the current market is more fake and shoddy, pay attention to the use of good quality. 36% of trichloroisocyanuric acid (dry cotton) 15 grams, are effective against brown wilt, blight, anthracnose. Be careful not to mix with organophosphorus pesticides. 25% ropazone 30 grams, iodine (cotton only) 10 ml, a variety of diseases and wilt of cotton seedlings, Verticillium wilt effect is good. 80% Ethyl Iciclovir 8~10 ml is effective for various seedling diseases such as Verticillium dahliae, Rhizoctonia solani, Anthracnose, etc. Note: The product is decomposed due to metal or alkaline substances such as iron and aluminum. 72.2% Precise 25 ml to control damping-off and epidemics. 25% of the enemy's strength is 25 grams, which is a kind of systemic fungicide with protection and treatment. It is mainly used to control anthrax. 26% of rejuvenating spirit (complex copper zinc, lemon, copper and water agent) 10 milliliters, are effective against brown wilt, blight, anthracnose. 0.3% cotton song 30 ml (polyoxin) is effective against yellow wilt and blight.
Third, nutrition regulation and strengthening seedlings
E-prime 20 ~ 40 grams, 25 ~ 50 grams of green revolution, promoting long-term 10 ml, activated leaf tyrants 25 ~ 50 grams, 0.01% of brassin lactone 1 g, can significantly promote plant growth and enhance resistance. 25-50 grams more, 50 grams of urea, spraying on the nitrogen deficiency-type weak seedlings.
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