Roots are also known as ground lice and garlic pods, and fall is a threatening period. Therefore, in the autumn, beware garlic pests harm garlic sprouts. It uses larvae to feed on bulbs of garlic and causes the bulbs to rot. The above-ground leaves exhibit yellowing, wilting and even death.
The prevention measures are as follows:
Agricultural control. The disease-free seedless garlic, non-injury, uniform-sized and fresh seeded garlic are used, and non-onion and garlic crops are rotated for 3 to 4 years. The organic fertilizer must be applied after high-temperature fermentation and decomposed, and when used as a base fertilizer, it is buried deeply. Isolated from the kind of garlic, garlic sprouts and wet afraid of dry, around the roots of garlic, spreading 150-200 kg of ash per acre, the control effect is better. Occurrence of garlic sprouts, flooding with water if necessary, can reduce the occurrence.
Physical control. In the adult stage of adult rootworm, brown sugar water, vinegar, and water can be used to prepare a 1:1:2.5 ratio of trapping liquid, and add sawdust and trichlorfon to mix well, put into the trapping pot, and seduce and kill adult insects in garlic. In this way, killing adults before spawning can yield a multiplier effect. In combination with watering, topdressing nitrogen and sulphur fertilizers that have a deterrent effect on garlic sprouts are used to reduce the degree of damage. Two stages of ammonia water are applied before the garlic rotten period to repel adult worms. Rotten mother period less irrigation to reduce the amount of eggs.
Chemical control. Combine sowing with 5% phoxim granules per acre with 3 to 4 kg of condiment cake or 50 kg of fine soil, spread in the sowing ditch. Choose the healthy and disease-free kind of garlic for the seed dressing treatment, that is, add 80% dipterex 20 times 5 kg per 50 kg, or use 50% phoxim 100 to 150 ml plus 25 to 30 kg of water. 200-250 kilograms of garlic for dressing, with the broadcast with the mix. At the beginning of larvae, 2.5% trichlorfon powder was sprinkled on the base of the plant and its surrounding soil. 90% trichlorfon 800 to 1000 times, 80% dichlorvos 500 times, 50% phoxim 2000 times, 40% dimethoate 1000 times, pyrethrum 400 times, and ferrous sulfate 300 can also be used. ~ 400 times the liquid, 48% of Looseben EC 1,000 times Irrigation root control. The hydrocyclone on the sprayer head was removed and the liquid was injected into the root soil for 10 days once, and the insects were treated 2 to 3 times. In the period of adult emergence, timely spraying control. Apply 2.5% dipterex powder 1.5-2 kg per acre, or use 40% Dimethoate EC 1000 times, 2.5% Dihydromethrin EC 2000-3000 times, and 25% Simpi EC 2000~2500 times , Once every 7 days, continuous control of 2 or 3 times, the best effect of 9 to 11 am. You can also use 80% dichlorvos 600 ~ 800 times the amount of liquid mixing evenly distributed wheat stubble, smoked adult, 7 to 8 days after the sprinkle.