Prevention of lily pests
Red spider red spider red spiders are often clustered on the back of day lily leaves. The victim's leaf was white with small spots, and red veined spots appeared near the veins. Leaves of spider mites are gray and white for a long time. When they are severe, they are slightly crushed and rusted brown. The buds dry up and the plants die. Its adult body color changes greatly, usually red and rust red, but also green, black and yellow, the female was pear-shaped, body length 0.4-0.6 mm, larvae body round, about 0.15 mm long, body color transparent, take After eating, body color becomes dark green. The red spider can have about 20 generations a year. Adults, nymphs, larvae, eggs overwinter on the dead leaves of autumn seedlings, in the earth seams or on weeds, and in the second year, they begin to grow and reproduce with unearthed yellow spring seedlings. Red spiders breed more quickly in May and the damage is exacerbated: In June and July, the number soared and the hazards deteriorated. The growth and reproduction of autumn seedlings increased from October to November. Control methods: Spray 40% dimethoate 1000 times, acre dosage 75-100 kg, spraying once every 5-6 days, 23 times in succession, can be used 25% Zhongkemei Ling 1000-1500 times liquid spray, mu dose 75-100 Kilograms are sprayed every 5-6 days for two or three consecutive times. Can also be used detergent, diesel, emulsion 1:03:200 times spray. Can also be used 0.3-0.5 degrees of lime sulfur 1:1 50 times spray. Or use 4.5% high efficiency cypermethrin 2000-2500 times, 75-100 kg per mu spray. Spray once every 5-6 days for 2-3 consecutive times. If the above drugs are used alternately, the effect is better. Aphid yellow flower aphids are wingless aphids. About 3-5 mm in length, body pink, compound eyes black and red, antennae. Eggs are as large as millet. The larvae are green, with 6 pairs of feet. The tail has 1 pair of horny tubes. It can secrete mucus to attract ants, can parthenogenetic, can breed for 8 to 10 generations in 1 year, and the generation overlaps obviously. Yellow locusts generally clustered on the back of leaves in late May and spread to flower buds and buds in the middle and late June. The damage was most severe in July. The locust sucks the sap from the flower buds so that the damaged buds do not spread out and are stunted, affecting the yield and quality of day lily. Control methods can be used 40% dimethoate EC 1000 times spray, acre dose 75-100 kg, spray once every 5-6 days, 2-3 consecutive times. Can also be used 5% high-efficient 3000 times solution of rattan cyanide spray, mu dose 75-100 kg, spray once every 5-6 days, continuous 2-3 times. Can also be used 25% Zhongkemei Ling 1000-1500 times liquid spray, acres of 75-100 kg, spray once every 5-6 days, continuous 2-3 times. Or use Krupp Po 1500-2000 times liquid spray, acre dosage of 75-100 kg, spray once every 5-6 days, continuous 2-3 times.
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