Scientific name Gryllotalpa unispina Saussure Orthoptera, Polygonaceae. Alias ​​single hedgehog, big clam, lara clam, teriyao, earth dog, ground dog. Located north of latitude 32 north. From April to November, the host planted seeds and seedlings that were planted on cereals, tobacco, sweet potatoes, melons, vegetables, and other crops. Injury characteristics Adults and nymphs are all active in the soil. They feed on sowing seed, young shoots, or kill the seedlings. The roots of the victims are indistinctly numbed. As a result of earthworm activity, many layers of tunnels were cut into the topsoil and the roots of the seedlings were separated from the soil. As a result, the seedlings died due to water loss, and the seedlings were severely cut off. In the greenhouse, due to the high temperatures and early activities, combined with seedlings, the damage is even heavier. Morphological characteristics of female adult body length 45-66mm, male 39-45mm, brown body, dark brown head, oval, compound eye oval, monocular 3, whip antennae. The thoracodorsal plate is shield-shaped, its front edge is inwardly curved, and its heart has a heart-shaped dark red spot in the middle of its back. The yellowish-brown wings of the forewings lie flat on the back and are 15mm long, covering less than one half of the abdomen; the hind wings are 30-35mm long and are rolled into a tube. The forefoot is well-developed, and the midfoot and hind foot are small. The dorsal internal margin of the posterior foot has a distance of 1-2 or nothing, unlike the Oriental Warts. Egg length 1.6-1.8mm, oval, yellow-white to yellow-brown. A total of 12 instar nymphs, 5 instar nymph body color, body shape and adult similar. Life habits are completed in about 3 years. In Beijing, Shanxi, Henan and Anhui, overwintering nymphs or adults of over 8 years of age, the adults of Hunchun began their activities, began to lay eggs in June, hatched as nymphs in mid- and late-June, and entered the 8-9-year-old nymphs during October-November. In the second year of winter, the nymphs lived in the upper and middle activities in April. After 3-4 times of molting, the nymphs passed the winter in the fall, and began to move in the third year of the spring. After the nymphs matured in the middle and early August, they licked the skin once more. Feathering was adult, and winter was added after supplementing the nutrients until the fourth year. In July and July, the spawning continued to breed in June and August. The worm completed 1 generation for a total of 1131 days, including 11-23 days for the egg period, 736 days for the nymph's 12-age period, and 378 days for the adult period. The Huanghuaihai region starts its activity in March and April when the soil temperature reaches 20°C at 20cm. After mating, the soil chamber is located at 15-30cm in the soil. The female eggs are laid in the soil chamber, and the spawning period is 1 month. - 9 times, the average egg size of each female is 288-368 grains. After the female guards to the third age of the nymph, the adults become nocturnal and have phototaxis. Control methods (1) Application of fully decomposed organic fertilizer. (2) Using light trapping. (3) When there are 0.3-0.5 heads per m2 in the field, it is moderate, and more than 0.5 heads are serious and should be controlled. Apply Poison Valley at the time of sowing. (4) Apply poison baits. The remedial measures taken when the growing period is victimized. Generally, mamaifu and other bait are sauteed. For each 667m2, use 4-5kg of bait, add about 300% of 30 times aqueous solution of 90% trichlorfon, and then add appropriate amount of water and mix it into baits. Sprinkle it on the nursery floor in the evening. Before the first irrigation, to keep the ground moist, the effect is particularly good. (5) Pharmaceutical treatment Soil or chemical treatment Seed, reference to wolfberry control method. (6) During the growing season, it can be irrigated with 50% phoxim or 50% parathion or 20% methylisotriphos-pigment 2000x. In addition, 6% Myda granules can also be applied with 5008 mixed fine soil per 667m2. Instant Start UV Lamp, Ultraviolet Lamp, UV Lamp Supplier Ningbo Sunfine UV lighting Co.,ltd. , http://www.uvlightings.com