Scientific name Cryptoblabes gnidiella (Milliere) Lepidoptera, Polygonaceae. Aliases Spikeworm, high oysters. Distribution of East China, South China, Central South. It is the main pest in the panicle stage of spring and summer sorghum in Huanghuai Plain.
Host sorghum.
The traits of the adult worms were spawned in the spikelets or spikelets of sorghum tassels, and the larvae ate on the ear to prevent tender spikes and grains.
Morphological characteristics Adult body length 8-9mm, wingspan 11-16mm, forewings narrow, purple brown, dark brown dots covered. The fin base near the base of the base and the inner edge and the middle chamber facing each other with dark red veins, the center of the front wing has two concave black lines and a number of smaller black lines. The horizontal line is white, crossing the thin black lines, and there are six black spots on the outer edges of the wings. The hind wings are gray and slightly transparent. The wing tip, inner edge and each wing vein are slightly darker in color. Egg length 0.3-0.4mm, oval, flat thin, slightly longer in the middle, the surface with wrinkles. The last instar larvae are 10–14 mm in length, spindle-shaped, slender, and the young larvae are white-yellow and grow to yellowish-to-grass green or gray-black. The upper line is light brown, fine, and the middle of the abdomen to the abdomen and the abdomen have two vertical bands on each side. The sub-line is wider, dark brown, with a horizontal strip in the center of the abdomen divided into two parts, each with two hair pieces and a square arrangement. The dragonfly is 6-7mm long, yellow-brown to reddish-brown, with engraved dots on the abdomen. The distal part of the abdomen has two very close piercings and four to six hooks.
Life habits Jiangsu and Shandong are born 3 generations old, with mature larvae in the sorghum panicles or in the stems, leaves and sheaths. In late June and early July of the following year, it was adultated. There are 3-5 insects per panicle, many up to several dozen, enter the first generation of larvae in mid-July infestation period, in late July larvae matured in the ear pods larvae, larval period 20-25 days, During the flood season of 6-8 days, the end of July and early August the emergence of adults, the second generation of larvae infestation period in the middle and late August. The third generation larvae occur from early September to October.
Control methods Sprayed 50% of the sorghum pine oil or Malathion EC 1000 times from the flowering of the sorghum to the milking stage, and sprayed once or twice. Sorghum is sensitive to dichlorvos, trichlorfon, parathion, and monocrotophos, and is strictly prohibited.
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