According to Feng Jinghui's latest understanding, this year's wheat diseases and insect pests are showing a resurgence trend, the Hanshui River Basin, the southwest and north, the southern wheat area of Huanghuai, and the main wheat producing area of Huanghuaihai are expected to be 60 million mu; the area of red mildew disease in the middle and lower reaches of the Yangtze River, Jianghuai, the southern wheat area of Huanghuai, and the wheat area in the northern part of Huanghuai is expected to occur in 90 million mu; the blight in Hubei, Anhui, Henan, and north-central Jiangsu is expected to be 120 million mu; and the panicle aphids will occur in the wheat areas of central and northern Henan, the south and central parts of Shanxi, and most of Hebei.
Experts suggest that the focus of control is on stripe rust, gibberellosis and aphids. Today, Xiaobian will introduce you to the effective prevention and treatment agents.
Imidacloprid
It has the characteristics of broad spectrum, high efficiency, low toxicity, low residue, pests are not easy to produce resistance, safety to humans, animals, plants and natural enemies, and has multiple medicinal effects of touch killing, gastric toxicity and internal absorption. The quick-acting is good, and it has a high anti-efficacy within 1 day after the drug, and the residual period is as long as 25 days. The medicinal effect and temperature are positively correlated, the temperature is high, and the insecticidal effect is good. Generally 40 ml with water 300-400 ml coating 30-40 kg of seeds / mu.
Furazine
Third-generation nicotinoid insecticides. With the characteristics of high efficiency, low toxicity, wide insecticidal spectrum, long duration of efficacy, etc., the duration of efficacy is 3-4 weeks, and it is currently the largest sales volume of 5 types of insecticides (organophosphorus, carbamates, pyrethroids, organochlorines, neonicotinoids) in the world.
Acetamiprid
Nicotine chloride compounds are a new type of insecticide. Gastric toxicity and strong osmotic effect, insecticidal quick-acting, small dosage, high activity, wide insecticidal spectrum, effective period of 15-20 days, good environmental compatibility, etc. The dose of wheat aphid is 13.5 to 27 g/ha (equivalent to 3% acetamidamid emulsion 30 to 60 g/mu).
Thiamethoxine
The second generation of nicotine is a highly efficient and low-toxicity insecticide, which has gastric toxicity, touch killing and systemic activity for pests, and is used for foliar spraying and soil irrigation treatment. Note that this agent should not be mixed with alkaline agents and should not be stored in environments below minus 10 °C and above 35 °C.
Thiamethoxamine
Neonicotinoid is an insecticide with the advantages of contact killing, gastric toxicity and systemic activity, high efficiency, broad spectrum, small dosage, low toxicity, long efficacy period, no harm to crops, safe use, and no interaction resistance with conventional pesticides, and may become a worldwide large-scale insecticide variety. It can also be used for the control of aphids, leafhoppers, thrips, planthoppers and other hemiptera, coleoptera, diptera and some lepidoptera pests on rice, vegetables, fruit trees and other crops.
Flufenacilamide nitrile
Sulfomine insecticide can effectively control the nicotine, pyrethroids, organophosphorus and carbamate pesticides resistant to juice sucking pests, low toxicity to non-target arthropods, is the preferred agent for integrated pest control. When controlling wheat aphids 2.6 to 3.3 g/mu with 30 to 45 kg of water, stem and leaf spray, and large population density, it can be considered to combine other touch killing agents for control.
Highly effective cypermethrin
Also known as cypermethrin trifluorofluoride, kung fu permethrin. Wheat aphid control 20 ml/15 kg water spray. The insecticidal spectrum is wide, the activity is high, the medicinal effect is rapid, and it is resistant to rain after spraying, but it is easy to resist it for long-term use, and it has a certain anti-effect on pests and pest mites of the stinging mouthpiece, but the dose of mites used is 1-2 times higher than the conventional dosage. It is also suitable for pests of peanuts, soybeans, cotton, fruit trees and vegetables.
Prazidone
The new pyridine heterocyclic insecticide has the characteristics of high efficiency, low toxicity, high selectivity, and ecological safety to the environment, and its preparation can be used to control most of the pests of homoptera, especially the aphid family Whitefly and Leafhopper family. Suitable for vegetables, rice, melons and fruits and a variety of field crops. Wheat aphid control mu with 50% pyrazone WDG 5-10 g.
The above agents can be used for aphid control in Huanghuaihai and other places.
Triazolone
High efficiency, low toxicity, low residue, long shelf life, strong systemic triazole fungicide. It is effective for rust, powdery mildew, cloud pattern disease, and leaf blight. 100 kg of seeds can be mixed with 30 g of active ingredient (200 g of 15% wettable powder), or 8.75 g of active ingredient per mu (35 g of 25% emulsion), or 75-100 kg of spray with 15 g of active ingredient (60 g of 25% emulsion) with water.
Pentrazole
Highly effective systemic fungicide for seed treatment or foliar spraying of important cash crops. Each 100 kg of wheat seeds are seeded with 2% dry or wet mix 100-150 g (active ingredient 2-3 g).
Fluconazole
Wheat, barley, rice, sugar beets, rapeseed, legume crops, vegetables, grapes and apples can be used.
Hexazole
It is a triazole fungicide, with 5% suspension agent per acre, about 90-110 ml, spray can prevent wheat rust.
Propiconazole
Prevention and control of wheat powdery mildew, strip rust, pregnant ear stage mu with 25% emulsion 32-36 ml, spray water; prevention and control of wheat root rot can be seed treatment, according to the weight of the seed 0.12% -0.16% mixing, field application in the wheat panicle flowering stage, mu with 35-40 ml, spray water, if necessary, every 7-10 days re-application. Greenhouses use controllable seedlings for summer vegetable planting, and the effective period is as long as 15-35 days.
Triazolone, pentrazole, fluconazole, hexazole, propaconazole can be used in spring epidemic areas of wheat stripe rust in Huanghuaihai.
In the Yangtze River Basin, Jianghuai, southern Huanghuai and other areas where wheat gibberellosis is common, the first drug is applied again 5-7 days after the first drug is used in rainy rain and for a long time, and the second prevention and control is carried out. Occasional areas such as northern Huanghuai and northern China seized the flowering period of wheat to prevent it with medication in a timely manner. In the middle and lower reaches of the Yangtze River, Jianghuai and Huanghuai, cyanocyanin, valconazole, propythionazole and other agents and their compound preparations can be selected locally. In the dosage form of pesticide products, ultra-fine powder and glue suspension agent that are resistant to rain washing are used as much as possible.