Control of peanut diseases and insect pests

1. Peanut virus disease

Use non-toxic or low-toxic seeds to cut off or reduce the initial source of infection. Non-toxic seeds can be obtained by isolation propagation. Choose a big, full seed. Popularizing a technology-plastic film mulching technology in planting areas can reduce the scourge of virus diseases.

2. Brown spot

After peanut harvest, the sick leaves in the field should be removed in time, and when using manure made from diseased plants, it should be fully rotted and matured before use, so as to reduce the existence of disease sources.

3. Bacterial wilt

Rotation and stubble can effectively control the occurrence of bacterial wilt.

4. Rust

In addition to selecting disease-resistant varieties, it is necessary to strengthen field management, increase the application of organic fertilizer, phosphorus and potassium fertilizer, do a good job in drought prevention and drainage, cultivate excellent seedlings, and improve peanut disease resistance.

Understand the ripening time of peanuts and the solutions when peanuts encounter diseases and insect pests, so that we can better understand the hard work of farmers and cherish every fruit. I hope that friends who love peanuts can buy fresh peanuts when peanuts are ripe.

Disease and insect Pest Control of Peanut

Disease control of stem rot

If peanuts get stem rot, the cotyledons will turn dark brown and gradually lose moisture and appear dry rot. In the later stage, if it can not be treated in time, the black-brown disease will decay, from the leaf to the stem, until the plant above the ground dies.

One way to control peanut stem rot is to select peanut seeds with good disease resistance or seeds that do not carry pathogens before planting. And you can't plant the same crop repeatedly on the same plot. Another method is to choose drug spraying after the onset of the disease, 800 times of carbendazim spray two or three times, each time at an interval of about a week can effectively prevent the deterioration of stem rot.

Root rot disease

Generally, it can happen in the whole process of peanut growth. The disease showed that the leaves of the plant showed a yellowing process from bottom to top, and in the later stage, the leaves gradually fell off and the roots rotted to death. Before planting, the seeds were mixed with carbendazim, the diseases and insect pests of the land were cleaned up, and 1000 times liquid carbendazim was sprayed to control the disease after planting.

Pest control of aphids

Aphids mainly attack the aboveground stems and leaves of peanuts, suck the sap of leaves, and reproduce quickly, so untimely treatment will endanger the growth of peanuts. Early detection, early control and spraying with omethoate spray can effectively eliminate aphids.

Grub

Grub is an attack on peanut underground fruit, which will not only eat peanut shell and fruit, but also bite off peanut root system and cause plant death. Serious grub disease will affect large areas of peanut seedlings and reduce yield. First of all, to deal with grubs is to make full efforts on the soil before sowing, carbofuran or methyl phosphorus is evenly spread, accompanied by ploughing into the soil, can effectively control grubs. After sowing, phoxim mixed with fine soil can be shallowly buried near the root of peanut to achieve the effect of effective control.

Planting autumn peanuts to control diseases and insect pests

The main diseases of peanut are leaf spot and rust, leaf spot should be sprayed to prevent and control the disease in time at the initial stage of the disease, choose 75% chlorothalonil + 70% thiothalonil 1000 times 1500 times liquid, or 30% copper oxychloride + 75% chlorothalonil 1000 times liquid spray 2 times 3 times, once every 10 to 15 days, use alternately and spray evenly. To strengthen the prediction of rust, the lower leaves of the plant should be regularly checked at the early flowering stage and sprayed in time to control the disease. 50% triadimefon sulfuric acid suspension 1000: 1500 times, or 30% copper oxychloride + 75% chlorothalonil 1000 times solution spray control 2 times 3 times, once every 7 to 15 days, use alternately. If peanuts appear physiological yellow dwarf phenomenon, each 50 grams of magnesium sulfate, zinc sulfate and copper sulfate, 100 grams of borax, 250 grams of urea and 1 branch of phytoprotegerin can be used per mu, dissolved in 60 kg of water, sprayed once every 7 days, and sprayed continuously for 3 times.

The main pests of peanuts are peanut thrips, aphids, leaf rollers, Spodoptera litura and so on. Once the harm of thrips and aphids is found, spray control should be timely selected, such as 2.5% Kungfu EC 2000 times or 50% Cologne EC 1000 times (or both), 48% Lesbon EC 1000 times, 25% Aktai water dispersible granules 5000 times and so on. Leaf rollers and Spodoptera litura should be controlled in the early stage of low instar larvae (before the 3rd instar). The available medicaments are 2.5% Kung Fu EC 2000 times or 50% Cologne EC 1000 times (or both), 10% suspension 1000 times, 20% Miman suspension 1000 times, 48% Lesbon EC 1000 times, 5% Yitaibao EC 800x and so on.

Pay attention to rodent control during peanut ripening. Diphacinone sodium salt and bromine poison bait were placed around the planting area, and obvious warning signs were set up to ensure the safety of human beings and animals.