How do peanut white grubs occur? A detailed explanation of the latest control methods

Peanut is the most important cash crop in China. As the peanut planting area continues to increase, yields rise year by year, but the white grub problem in peanuts is also becoming more and more serious. It gnaws on the peanuts during growth and harvest, causing wormholes in the peanuts and seriously affecting yield and quality. So what causes white grubs? How should they be controlled? Let's take a look together.

I. Causes of white grub occurrence

1. There has been no obvious change in peanut cultivation. When plowing and harrowing, the soil is not worked deeply, only shallow plowing is done, or even no-till is used, which simply cannot destroy the living environment of white grubs, so white grubs become more serious year after year.

2. In rural areas, farmers mostly like to use farmyard manure such as chicken manure or pig manure for fertilization, but when these fertilizers are applied directly without being fully decomposed, they carry a large amount of bacteria and insect eggs, which also causes white grubs to run rampant.

3. Many farmers apply pesticides improperly. The pesticide concentration used is too low or the spray volume is insufficient, or the same pesticide is used for control over a long period, leading to resistance, so white grubs become more serious year after year.

II. White grub control methods

1. Deep plowing and land preparation

After harvest and before the end of the year, deep plow and prepare the land once, requiring a depth of more than 25 cm, and at the same time combine it with irrigation of freezing water, so that overwintering insect eggs can be effectively killed. When using farmyard manure, be sure to add microbial inoculants for full decomposition and fermentation, which can effectively avoid white grub breeding.

2. Treatment before sowing

Before sowing, seed dressing can be carried out with 0% chlorpyrifos 100 ml + 70% imidacloprid 15 g + 50% thiram 40 g. This can not only effectively control white grubs, but also has excellent control effects on other underground pests and diseases. Alternatively, before land preparation, broadcast 3% phoxim granules at 2 kg per mu, which can also very well prevent the harm of underground pests.

3. Control during the growing period

White grubs mainly occur during the pod growth period, so from flowering and pegging to the pod-setting stage, that is, in July-August, use % phoxim 250 ml, mix with 30 kg of soil, and broadcast it around the peanut plants, which can effectively control them. Or use 0% phoxim 800 times solution, remove the sprayer nozzle, and carry out root drenching, or use 40% isofenphos-methyl 800 times for root drenching. Be sure to carry it out during the flowering and pegging stage.

  The above is an introduction to the causes of peanut white grubs and control methods. We hope it can help you. To learn more related knowledge, please stay tuned to us.