Peanut underground pests are mainly grubs, followed by mole crickets, golden needle worms and so on. Underground pests are the main pests that affect peanut germination, fruit setting, pod setting, yield and quality, and can be harmful throughout the growth and development period. The control of peanut underground pests must master the control period, to achieve the combination of sowing period control and growth period control, adult period control and larval period control. The main control object of underground pests is grub, can take the following methods to control:
1. larval stage control
1. Liquid medicine watering method. 250-300 ml of 40% phoxim emulsifiable concentrate and 250-300 ml of 40% chlorpyrifos emulsifiable concentrate can be used per mu, and 300-00kg of water can be irrigated to root, and other underground pests can also be treated.
2, the law of spreading poison. 250-300 ml of 40% chlorpyrifos emulsifiable concentrate, 250-400 ml of 40% phoxim emulsifiable concentrate, 20-30kg of soil, or 1.5-2kg of 10% chlorpyrifos granule can be selected per mu, which can be evenly spread around peanut piers, and the effect of watering once after intertillage is better.
2. control of adult stage
1. Use fresh branches to trap and kill adult worms. During the period of adult emergence and unearthed, 3-5 branches of fresh elm, poplar and willow trees with a length of 60cm are bundled into one, immersed in 50 times solution of 75% phoxim emulsifiable concentrate for 5-6 hours, inserted into the field in the evening, and inserted 10-15 branches per mu to trap and kill adults. Conditional black light can be installed to trap.
2, the use of plant poison to kill adults. Growing castor in peanut fields can trap adults. The use of adult feeding on castor leaves (edible plants) after causing its paralysis, poisoning death and other effects of prevention and control. 20 to 30 castor plants per mu. If summer peanuts can be planted with castor, it is more suitable for castor to grow 2 to 3 leaves from the initial stage of adult to the peak stage, so the control effect is better.
3, spray control of adult. At the adult stage, 40% phoxim emulsifiable concentrate 1000-2000 times and 4.5% beta-cypermethrin emulsifiable concentrate 2000-3000 times were sprayed on the trees around the peanut field.
