The golden threadworm, belonging to the order of Coleoptera and Giardago, is also known as the ginger needle, iron wireworm, and gold tooth, which are hard, smooth and slender, mostly yellow-brown, resembling a golden needle. The major pests are Gloeophorus punctiformes and full-thick-breasted scar tissue. The roots and bases of the roots and stems of the plant are used for feeding on organic matter and are important underground pests. It is mainly for various kinds of crops such as Shikitake, Shoumi, Sorghum barley, and peanuts, sweet potatoes, potatoes, a barrel of hemp, beets and vegetables.

(1) Harmful characteristics The adult food of the worm is more miscellaneous, and its adult larvae on the ground are not long. The green leaf larvae that can only eat some crops such as cereals and legumes grow potassium in the soil. Bite the seeds just sowed and eat the endosperm so that the seeds cannot be made full. After the seedlings have emerged, they will damage the underground parts of the fibrous roots, main roots or stems, causing the seedlings to dwindle. After the larvae, the adult larvae can drill oysters, resulting in a reduction in yield, which is conducive to the invasion of pathogenic bacteria and causes the occurrence of peanut pods and fruit rot. One by one

(2) Occurrence The life history of the golden needleworm is very long and it usually takes 3-6 years to complete the generation. In the whole life history, the larva period is the longest, and the instar larvae or adults are overwintering in the earth. The depth of overwintering varies from 20 to 85 centimeters depending on the area and the infestation. The larvae have been feeding in the soil after hatching. The damage is most severe in spring and relatively light in autumn.

The dung beetles, which takes about 2-3 years to complete a generation, use larvae and adults for wintering in the earth. The mature larvae slaughtered in the underground 13-20 centimeters in August and were eclosed at the beginning of September. The adult eclosion did not emerge and they entered the wintering state. In the second year of March and April, the temperature rise began to be active. In early April, it was the peak of activity. In mid-July, it was the hatching period of eggs, and the larval period was as long as 1150 days. Activities in the soil damaged the roots of crops. In mid-October, In the late winter, it moves to the deep. In the spring of next year, when the soil rises, it begins to rise. The 3rd Sommoon Moon is the most prosperous. In the summer, the temperature rises and moves deeper into the summer. After the autumn weather is cool, it rises again and damages the autumn crops. Generally more spring rain, soil moisture, and its suitable soil moisture of 15% to 18% is beneficial to its occurrence. Adults hid in the Maichuan or Tianbian weeds and under the clods during the day and at night, the female adults could not fly, the action was slow, there was no phototaxis, and the males had a strong ability to fly. The eggs were produced in the soil 3-7. Deep in centimeters, the larvae directly harm the crop after hatching.

(3) Control methods

1 Agriculture Prevention and control of water and dry crop rotation is the best way to eradicate the golden leafworm. Combining the basic construction of farmland, deep plowing before planting, deep plowing after harvest, summer plowing, irrigation, watering and pest control, timely watering during the damage period of the golden worm, can effectively control; weeding and disinfestation, elimination of field weeds can reduce adult worms Spawning sites reduce the early food sources of larvae; rational fertilization and application of rotting fertilizers can improve the soil and promote the development of crop roots and strong seedlings, thereby enhancing the resistance of crops to insects.

2 Chemical seed dressing 40% Dimethoate 0.5 kg Water 20-30 kg for 200-300 kg seeds.

3 Phoxim boring 5 kg of 50% phoxim EC, 20 kg of water, and 225 kg of seeds. When boring, choose a shaded flatland, spread a piece of plastic cloth, and put a pre-measured seed. The appropriate thickness is about 16 cm. Spray the sprayed liquid onto the seeds with a sprayer, turn it while spraying, mix evenly, and then borse the seeds for 3-4 hours. During the stuffy stuffy process, turn it once every half hour to prevent liquid immersion. Bubble seed, affect germination. After boring the shade, you can sow.

4 When covering peanuts with seeds and seeds, use 2.5-5 kg ​​of phoxim granules per acre, cover them with seeds, then cover the soil to treat both locusts, thrips and golden needles.

5 Stacks of grass seduce the sterilized golden-headed golden worms Stacking 8-10 cm thick fresh slightly wilted grass piles in the field, 50 piles per acre. A small amount of 5% trichlorfon powder or 5% dimethoate powder was applied under the grass to kill and kill the fine-breasted worms.

6 physical control using light trapping. Using the phototaxis of Gloeoidea, black light is set in the fields during the beginning and end of life, trapping and killing adults, reducing the amount of eggs in the field.

7 For poisonous soil, use 48% Diziling, 200-250 grams of emulsifiable concentrate per acre, 50% of phoxim EC 200-250 grams per acre, add water 10 times, spray on 25-30 kilograms of fine soil and mix well into toxic soil, After applying the ridges and ridges, 5% methicillin-killing granules are used to produce 2-3 kilograms of 25-30 kilograms of toxic soil per acre, or 5% methyl chlorpyrifos granules, 5% Phoxim granules treated with 2. 5-3.0 kg of soil per acre.

8 spray kill adult worms at the peak of adult emergence, the emergence of peanuts field per acre with 5% efficient Adriamycin wettable powder 10-20 grams, water 30-40 liters, foliar spray, control of adult.

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