The scientific name Scotinophara lurida (Burmeister) is a hemiptera, Aphididae. Located in southern Hebei, Shandong and northern Jiangsu, provinces and regions south of the Yangtze River.
Hosts are responsible for rice, but also damage wheat, millet, corn, sugar cane, beans, potatoes, citrus and so on.
Injury characteristics, nymphs sucking rice stems, leaves and panicle sap, the site of the victim's yellow spots, severe labor and development suppression, resulting in the whole plant withered. In recent years, with the changes in the ecological environment of farmland and the changes in crop layout, the pests have been increasing year by year.
Morphological characteristics Adult body length 8.5-10mm, width 4.5-5mm, long oval, dark brown to black, the middle of the head and the same length of the lateral leaf, compound eye prominent, long after the foot base between the base. The front corner of the thoracodorsal plate stretches laterally. Small scutellum tongue, slightly concave or truncated at the end, a few up to the end of the abdomen, both sides of the edge slightly curved in the central front. The eggs are nearly barrel-shaped, reddish-brown, 0,90.8 (mm) in size, and the ovum is round and round, and there are 40-50 breathless sperm holes around the teeth; the egg shells have small engraved dots on the reticular pattern. White powder. 1st instar nymph head brown, belly brown or purple, red stitches, ventral back with red spots, body length 1.3mm. The 3rd instar nymphs were dark brown to grayish brown with a small reddish-brown dot on the abdomen and a slightly exposed frontal wing bud with a body length of 3.3mm. 5th instar nymph
The head and chest are light black, the belly is slightly green, and the hind wing buds are obvious. The body length is 7.5-8.5mm.
Life habits Jiangsu, Zhejiang, 1st generation, Jiangxi 2nd generation, Guangdong 2-3 generations. Adults and a few older nymphs were overwintered at 5-10 cm below the stones, in the soil seams, or in the rhizosphere of the weeds, between the rice piles, and between the bark joints. In the summer of early summer, the colony was attacked by rice. The nymphs and nymphs lurked in the sunny part of the day at the base of the rice paddy, and in the evening or cloudy days, they sucked on the leaves or panicles. The eggs were collected on the leaf sheaths 6-9 cm above the surface of the rice plant, and the eggs were more than 14 pieces. Arranged in 2 rows. Each female produces 75 eggs. The early sowing fields with vigorous growth and rich green leaves are more serious in the ridge fields in the hills and mountains. Natural enemies mainly include rice blast black bees, Beauveria bassiana, hunting birds, spiders, and frogs.
Control methods (1) Use adult worms to lay eggs on the rice stems near the surface of the water and eggs in the water to immerse the spores for 24 hours without hatching. In the spawning period, the eggs should be properly drained, the spawning position should be reduced, and the water should be poured to 10-13 cm. The spores were immersed in the spores for 24 hours and then irrigated once every 3 to 4 days. Continuous 4-5 times can kill a large number of egg masses. (2) In the low-innocence nymph stage, spray 2.5% of cream 1500 times or 20% of fenvalerate 2000 times, 190% of crystal 800 times of trichlorfon, and then prevent it once 15 days later. Such as using 10% imidacloprid (one time) WP 2000 times, although the effect is slower, but the effective period of up to 25-30 days, production can be promoted.
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