Prevention of day lily pests

Red spider Red spider is a small, spider-shaped red bug. Injury leaves, adults and nymphs cluster on the back of leaves, sucking plant juices. The gray and white dots appeared in the victim's place. When it was serious, the entire blade was gray and eventually died. Control Method 1 Spray 40% of Dimethoate Emulsion 1500-2,000 times once a week until 10 days before harvest. 2 Spray with 20% triclosan WP wettable powder 800 times to kill nymphs and eggs. The residual period is 30--50 days. The pesticide is harmless to humans and animals and has no toxicity to the beneficial insects of the predators. It is chemically stable and can be mixed with Other pesticides or fertilizers. Locust worms mainly occur in May, first to damage the leaves, gradually to flowers, buds sucking juice, after flowering buds thin, easy to fall off. Control method 1 Use 40% dimethoate cream 1200--1500 times solution or dimethoate 50 grams plus 100 grams of marathon, water 100--150 liters, spray once a week until 10 days before harvest. 2 During the flowering period, spray 4% rattan extract 800--1000 times. 3 500 grams of cotton soap, slice, open with a small amount of hot water and add water to 50 liters, stir and spray. The pink-spotted moth, also known as the moth moth, is a pest that often occurs when dry products of day lily are stored in warehouses. Adult body length 6--7 mm, wingspan 14--16 mm, forewings long and narrow, light brown, sometimes grayish black, near the base of a 1/3 Department there is not obvious light color transverse front wings, outside the pattern of dark wings . The hind wings are greyish white. Ovoid, milky white. The mature larvae have a body length of 12--14 mm, a brown head, and a relatively small black spot at the base of the bristles. The widespread distribution of pink spots is widespread in China, except in Xinjiang, and the food is very miscellaneous. All plant products such as rice, rice, rice, flour, herbs, oil, etc. have almost no harm. It can at any time injure the day lily, especially after the late flower buds are steamed. Because the flowers are loose and the anthers are exposed, this kind of pests are most interested in eating and anthers, so the anthers are often harmed first after being stored, and then gradually Switch to other parts. This kind of pests and spun silk knot nets, often concatenating buds into pieces, while discharging a large number of feces with odor, greatly reducing the quality of day lily products. Four generations of pink-spotted moths occur in one year. The larvae are hidden in overcast shelters on packs, pad boards, house poles, sidings, or warehouses, and continue to be harmed the following year. In addition, it can also be introduced into the lily warehouse from the nearby grain warehouses. Therefore, prevention and control must be strengthened. Prevention and control methods 1 Do a good job in environmental sanitation. Before storage, the inside and outside of the warehouse shall be thoroughly cleaned, ticked off insect nests, and the gaps shall be blocked and jammed with paper reinforcements. After the walls are plastered with lime slurry, 80% of dichlorvos 20--40 mg per cubic meter of space shall be used or impregnated. The sawdust smoke agent of the trichlorfon is fumigated and the net insect pests are eliminated. 2 Day lily for storage should be of good quality and generally be stored after proper dry storage. Storehouse doors and windows shall be provided with screen doors and screens to prevent adult insects from flying in. Warehouses were hung with strips of dichlorvos to kill the incoming pests. 3 When insects were found, they were killed by exposure to the sun after sieving, or they were frozen at -1°C for 1 day. They could also be smoked with drugs. Use 30--40 grams of chloropicrin (triclosomethane) per cubic meter. Spray onto the packaging bag of lily or spray it onto an empty bag and hang it in the warehouse. Can also be used per cubic meter of 190 - 220 grams of ethylene dichloride or methyl bromide (methyl bromide or methyl bromide) 20 grams, closed fumigation for 72 hours. Cockroaches are collectively known as a variety of chafer larvae, commonly known as Zerg insects and white silkworms. The larva is white and its head is reddish-brown. It is often curved in a "c" shape. It hides in the ground and grows yellow. Adult worms are oval in shape, coleoptera leathery, hard, dark brown, shiny. During daytime drilling, the earth will fly out of the night for food. Larval and adult worms live in the ground. Adults have been unearthed in mid- and late April, and they have been shown to be deadly and phototaxis-like. Nightfalls occur, and they tend to be strong toward black light and unfamiliar manure. Happiness is in the soft, wet soil, spawning, a female lays about 100 eggs. In the end of June, a small embarrassment began, and after the beginning of autumn it began to harm. From the end of September, drill into the 30--50 cm depth of the earth for winter. In the spring of the following year, the soil began to rise before defrosting. When the soil temperature exceeded 10°C, the seedlings were submerged into the tillage layer until the end of June. In August-September, it dropped to 30--50 cm below the ground and did the wintering in the earth room. In April of the third year, activities began again. The average soil temperature is 13--18°C, and the humidity is high. Especially when the rain is continuous, and the soil contains a large amount of unfailing organic fertilizer, the damage is severe. The larvae and tender stems often bite, causing the lack of plants, broken Ridge. Prevention and control method 1 using black light trapping. 2 Deeply turning the land before planting and after harvest, turning the pests in the cultivated layer to the surface and promoting natural death. 3 The organic fertilizer should be thoroughly cooked. For 3,000 kg of trichlorfon powder, 2 kg of trichlorfon powder should be sprayed into every 3,000 kg of worm manure, and after 5-7 days of boring, it should be applied to the soil. 4 Before sowing or planting, spray 5% carbaryl powder per acre, or 2kg of 2.50% trichlorfon powder, and then soil preparation; when planting, apply ammonium bicarbonate, ammonia water, or hydrogenated superphosphate. This kind of fertilizer can emit ammonia gas, which can repel the underground pests such as earthworms and can reduce the damage. 5 When fleas are found to be harmed, 50% phoxim emulsion 1500--2000 times, 50% cotton worm (2000) emulsion 2000--3000 times, carbaryl wettable powder 1000 times, or 90% crystal Trichlorfon 800 times, drenching roots; or combined irrigation, add poison to kill.

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