Peanut Pest and Disease Control Methods and Key Technical Points

1. Peanut viral diseases

Use seeds that are virus-free or low in virus content to cut off or reduce the initial source of infection. Virus-free seeds can be obtained through isolated propagation. Choose plump, large seeds. Promote a technique in planting areas - plastic film mulching - which can reduce the damage of viral diseases.

2. Brown spot disease

After the peanut harvest, promptly remove diseased leaves from the field. When using manure made from diseased plants, allow it to fully decompose and mature before use, to reduce the presence of disease sources.

3. Bacterial wilt

Crop rotation and changing to a different crop can effectively control the occurrence of bacterial wilt.

4. Rust disease

In addition to selecting disease-resistant varieties, field management should be strengthened, the application of organic fertilizer and phosphorus and potassium fertilizers should be increased, drought prevention and drainage work should be done well, and excellent seedlings should be cultivated to improve the disease resistance of peanuts.

Now that we understand the maturation time of peanuts and also know the solutions when peanuts encounter pests and diseases, we can better appreciate the hard work of farmers, cherish every single kernel, and we hope that friends who love eating peanuts can all buy fresh peanuts during the peanut harvest season!

Peanut pest and disease control

Disease control

Stem rot

If peanuts contract stem rot, the cotyledons will turn dark brown, gradually lose water, and develop dry rot. If not treated in time in the later stage, the dark brown diseased areas will decay, spreading from the leaves to the stem, until the aboveground parts of the plant die.

One method for controlling peanut stem rot is to select peanut seeds with good disease resistance or seeds that do not carry pathogens before planting. Also, the same crop cannot be planted repeatedly in the same plot. Another method is to use medication spray control after the disease occurs: spraying 800-fold diluted carbendazim two to three times, with an interval of about one week each time, can effectively stop stem rot from worsening further.

Root rot

It can generally occur throughout the entire growth process of peanuts. Symptoms include leaves turning yellow from bottom to top, with leaves gradually falling off in the later stage, roots rotting until death. Control methods: before planting, dress seeds with carbendazim, do a good job of clearing pests and diseases from the soil; after planting, if the disease occurs, spray with 1000-fold diluted carbendazim (50%) for treatment.

Pest control

Aphids

Aphids mainly attack the aboveground stems and leaves of peanuts, sucking the sap from the leaves, and they reproduce quickly. If not dealt with in time, they will endanger the growth of peanuts. Detect early and control early; spraying with omethoate spray can effectively kill aphids.

White grubs

White grubs attack the underground peanut pods. They not only eat the peanut shells and kernels, but also bite through the peanut root system, causing the plant to die. Severe white grub damage can affect large areas of peanuts, causing dead seedlings and reduced yield. To deal with white grubs, the first step is to work hard on the soil before sowing: evenly apply carbofuran or phorate, and incorporate them into the soil along with plowing, which can effectively control white grubs. After sowing, phoxim can be mixed with fine soil and shallowly buried near the peanut roots to achieve effective control.

Planting autumn peanuts and controlling pests and diseases

The main diseases of peanuts include leaf spot and rust. For leaf spot, spray pesticides in a timely manner at the early stage of the disease for prevention and control, using 75% chlorothalonil + 70% thiophanate-methyl at 1000-1500-fold dilution; or 30% copper oxychloride + 75% chlorothalonil at 1000-fold dilution, spraying 2-3 times, once every 10-15 days, used alternately, spraying evenly and thoroughly. For rust, strengthen monitoring and forecasting, begin regular inspection of the lower leaves of the plants from the early flowering stage, and spray pesticides in a timely manner to control the disease. You can use 50% triadimefon sulfate suspension concentrate at 1000-1500-fold dilution; or 30% copper oxychloride + 75% chlorothalonil at 1000-fold dilution for spray control 2-3 times, once every 7-15 days, used alternately. If peanuts show physiological yellow dwarfing, per mu you can use 50 grams each of magnesium sulfate, zinc sulfate, and copper sulfate, plus 100 grams of borax, 250 grams of urea, and 1 stick of plant protection agent, dissolved in 60 kg of water, spraying once every 7 days for 2-3 consecutive sprays.

The main pests of peanuts include peanut thrips, aphids, leaf rollers, and Spodoptera litura. Once thrips or aphid damage is found, promptly choose 2.5% cyhalothrin EC at 2000-fold or 50% chlorpyrifos EC at 1000-fold (or a mixture of both), 48% lesben EC at 1000-fold, 25% acetamiprid water-dispersible granules at 5000-fold, etc. for spray control. Leaf rollers and Spodoptera litura should be controlled by applying pesticide in the early stage of young larvae (before the 3rd instar). Optional agents include 2.5% cyhalothrin EC at 2000-fold or 50% chlorpyrifos EC at 1000-fold (or a mixture of both), 10% chujin suspension concentrate at 1000-fold, 20% miman gel suspension at 1000-fold, 48% lesben EC at 1000-fold, 5% yitaibao EC at 800-fold, etc.

During the peanut maturation period, pay attention to rodent control. Place diphacinone and bromadiolone bait at fixed points around the planting area, and set up obvious warning signs to ensure the safety of people and livestock.