Goldworm
Wireworms (click beetles) are from the order of Coleoptera, and from the family of the tapiridae. For the larvae of the Cockatoo. For the common major underground pests. There are different distributions of golden needles in the north and south. Pleonomus canaliculatus (Faldermann) and Agriotes fuscicollis Miwa (A. subvittatus Mostschulsky) are the most widely distributed. In the north, Nematode, Nematode, and Melanotus caudex Lewis are common species.
Harmful food habits can endanger a variety of plants and is one of the major underground pests. Roots, tender stems, and early germinating seeds of various seedlings are bred. It can also harm fruits that are close to the ground. More damage to crops and nursery crops.
Morphological characteristics: Strictus fabriformis: Slightly pale yellow and shiny, mature larvae 23 mm long.
Ditchworm: The body is broad and flat, and the mature larvae are 20 to 30 mm long, golden yellow, with fine hairs.
Brown leafworm: The mature larvae are about 25 mm long. From the second thoracic node to the eighth abdominal segment, there are crescent-shaped stripes on both sides of the front edge of each section.
Chestworm: The last part of the abdomen is not bifurcated, conical, and each has a round brown spot on the back side of the base.
Dung beetles: The last section is bifurcated and each has a small tooth on the inside of the fork.
Brown leafworm: The distal segment is flat and long, and the tip has three dentate processes.
Occurrence characteristics Gloeoidea is suitable for breeding in arid regions and is completed in 2 to 3 years. Winter larvae and adults live in the soil. From mid-April to mid-May, the following year, it is a period of activity, lurking in the topsoil during the day and mating and spawning at night. Each female lays an average of 90 eggs. Males have phototaxis. The larvae begin to move when the soil temperature is 10 centimeters and 6.7 degrees Celsius. The larvae begin to attack at 9.2 degrees Celsius, and the damage is the most severe at 15.1 to 16.6 degrees Celsius. The soil temperature rose to 19. At l~23.3°C, the larvae sneak into deep soil in summer.
The thin-skinned snails are generally distributed in low-lying clay land or in high humidity, and are completed in 3 years. Adults tend to have a tendency toward decaying grasses. In July, adult eggs spawned at the height of their eggs and eggs were produced on the surface. The larvae prefer moist and acidic soil environment, and the optimum soil temperature for the damage period is 7-13°C. When the soil temperature rises to 17°C, the hazard is stopped.
In the spring and fall season, adults can use 50% dichlorvos or 500 grams of trichlorfon and mix 25-30 kilograms of fine soil to sprinkle on the ground or into the soil surface; or use 3% of the rice per acre before sowing. Seoul granules 2 to 6 kg, mixed with dry fine soil 50 kg sprinkled on the surface, squat 20 cm, or scattered into the planting hole (planting ditch) after the shallow cover soil colonization.
Control methods
1. When intensive management is conducted, intensive cultivation will be carried out, and organic fertilizers should be fully cooked before being used.
2, soil treatment per hectare seedbed or planting field with 10% diazinon granules 30 ~ 45kg, or 5% phoxim granules 15 ~ 2.5kg, fine dry soil 300-450kg, after mixing and spreading in the seedbed On, or applied to the planting hole.
3. Bait bait and kill 75 kg of wheat bran, which is roasted and flavored, and 0.75 kg of 90% crystal trichlorfon dissolved in 7.5 kg of water per hectare are evenly mixed to make a poison bait, which is then thrown into the field in the evening for baiting.
4, Irrigation with 50% phoxim EC or 90% crystal trichlorfon 800 times Irrigation, each 0.5kg per hole.
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