What pesticide is effective for controlling white grubs
White grubs are a common pest that damages many kinds of crops and generally live in the soil, so what pesticide should be usedto control white grubs?
1. Basic introduction to white grubs
The Chinese scientific name of the white grub is white soil grub, also called old mother worm, walnut worm, etc. It is the larva of the scarab beetle. According to feeding habits, white grubs can be divided into three types: phytophagous, coprophagous, and saprophagous. Phytophagous white grubs damage many kinds of crops, cash crops, and flowers and nursery stock, and prefer to eat newly sown seeds, roots, tubers, and seedlings, so controlling white grubs during plant growth is extremely important.
The damage caused by white grubs to orchard nurseries, seedlings, and other crops is heaviest in spring and autumn. Activity increases when the soil is moist, especially during continuous rainy weather. In spring and autumn they are active in the surface soil layer, while in summer they mostly move to the surface soil layer in the early morning and at night.
2. What pesticide should be used for white grubs?
50% phoxim emulsifiable concentrate can be used to treat soil, or 50% phoxim, 50% parathion, or 20% isofenphos can be used for seed dressing. These all have a certain control effect on white grubs.
Among them:
For 50% phoxim emulsifiable concentrate, the dosage per mu is 200-250 grams. It can be diluted with 10 times water and sprayed onto 25-30 kg of fine soil, then mixed evenly to make poisoned soil. Apply it in strips along the rows, then shallow hoe immediately, or spread the poisoned soil into the seed furrow or on the ground, then plow it in immediately or mix it into barnyard manure before application.
For seed dressing with 50% parathion or 20% isofenphos, the ratio of pesticide, water, and seeds is 1:30:400-500.
In addition, physical methods can also be used to kill the insects. Black light traps can be set up to attract and kill adults, reducing the number of white grubs.
If white grubs need to be collected for medicinal use, they can be captured from May to August by turning over the soil 1-2 cun deep near tree roots and grass roots, then killed with boiling water and dried in the sun.