Scorpion midge

The scientific name Stenodiplosis panici Plotnikov is Diptera, Gryllidae. Alias ​​mosquitoes, sucking insects. Distribution in Heilongjiang, Jilin, Liaoning, Gansu, Ningxia, Henan and other places planting areas.

Host lice, grass.

The characteristics of larvae damage the flowers, resulting in the ovary can not be normal pollination or development, the formation of empty shell pods, the loss of ear spikes grayish water-dried, the grain of the inner Ying, Ying Ying faded white.

Morphological characteristics Adult body length 2 - 2.5mm. Dark red body. The compound eye is black, and the antennae are gray and black in 14 sections, translucent grayish wings, dense hairs, long and dense bristles, and 3 wing veins. The back of the chest is black and the sides are orange. Slender foot. The abdomen is black on the back and orange on the ventral surface. Eggs long oval, white translucent. The larvae are cricket-shaped, orange-red, with a very small head, a smooth body surface, and no cheekbones in the middle chest. It is 2mm long, orange and darker.

Life habits 3-4 years old, the mature larvae in the scorpion or scorpion crust wintering, the wintering period of up to 9-10 months, until the following year of phlegm, flood season 3-4 days, the end of July eclosion, In mid-August, it enters the peak period. After mating, the female eggs are laid on the seedlings of the medlar. The egg production is 10 to 60 grains. The adult life span is 3-5 days. At the end of August and early September, the second generation of adults appears, mating and laying eggs. The hatching larvae are responsible for the re-infestation of the scorpions. The larvae are 8-11 days old, and the third generation occurs in mid-September. When the larvae are mature, they will bear the winter in the mid- and late-September. It takes more than 20 days to complete the generation. Adults can fly short distances without being active. Rely on worms, maggots, pods mixed in the seed or sorghum spread.

Control methods (1) Use early maturing, heading and neat varieties, appropriate early sowing. (2) Slurry water is selected before sowing and the pest particles mixed in the seeds are eliminated. (3) Reasonable rotation should be used to avoid re-embarrassment. (4) 2.5% of trichlorfon powder was sprayed off during adult spawning period, 1.5 kg per 667m2. (5) Heavy can spray 80% of dichlorvos EC 1000 times.

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