The scientific name Haplothrips tritici (Kurdjumov) is from the order of the Thysanoptera. Alias ​​wheat pecker horse, wheat Jane tube hummer. Distributed in Xinjiang, Gansu and other provinces.
Hosts wheat, barley, rye, oats, sunflower, thin Gongying, Setaria and so on.
Injury characteristics, nymphs damage wheat flower, sucking grits during the milking period, causing grain filling is not full or open grain. In addition, it protects the spikelets from the glume and exosome. The damaged glumes are shriveled or withered, yellowish or dark brown, easily infected by pathogens, causing mildew or spoilage.
Morphological characteristics Adult body length 1.5-2.2mm, body dark brown, wings 2 pairs, long bristle hairy edges, colorless fore wings, only near the base dark. The head is slightly square, and three single eyes are arranged in a triangle in the compound eye. The antennae are 8 knots. The length of the 3rd segment is 2 times the width, and the bases of the 3rd, 4th, and 5th segments are yellowish. The end of the abdomen extends into a tube called a tail tube. The egg is about 0.45mm long, long oval, yellow. The nymphs are wingless. The newly hatched nymphs are light yellow and later turn orange-red. The antennae and tailpipes are black. The anterior zygomatic is shorter than the 2nd instar nymph, light red, and wing buds exposed. The pseudopod antennae extend to the sides of the head and the wing buds grow and darken.
Living habits are born for 1 generation, and nymphs are wintering at 10 cm below the ground or in the scene. The activity starts at an average daily temperature of 8°C in the following year, about 5
In the middle of the month, it enters the peak of phlegm, feathers in mid-May, and enters the peak of emergence in early June. It enters the wheat field after emergence, and sucks sap from the inner ear and ligule of the upper leaves of the wheat, and then from the top of the flag leaf sheath of wheat or Leaf sheaths invade into the wheat ears that have not yet been extracted. Injuries are caused by flowering plants. Occasionally, dozens to hundreds of adults are clustered within one flag leaf. After the heads are removed, the adults are transferred to unleached or half-extracted ears. The damage and spawning time is only 2-3 days. Adult oviposits began to spawn 7-15 days after emergence. The eggs were laid on the top of 2-3 spikelets at the tip of the ear or on the inner side of the spider tip. The eggs were arranged irregularly and the egg period was 6, 5 to 8.4 days. When winter wheat was harvested in early July, some nymphs fell to the ground and crawled into the earth seam or concentrated under the wheat bale or wheat heap. Most of the nymphs climbed into the wheat clumps or leaves, and some were transported with wheat bales to the wheat. The summer or winter over the field. The new buckwheat land, spring wheat and late-maturing varieties are heavy.
Prevention and control methods (1) Reasonable rotation and dumping. (2) Early sowing in due course, avoiding the period of damage. (3) Deep plowing will be carried out in time after autumn or wheat harvest, weeds will be cleared around the wheat field, and their overwintering sites will be destroyed, which will reduce the number of overwintering populations. (4) In the booting stage of wheat, when a large number of adult thrips fly into the wheat field to lay eggs, spray 20% butylthiocarbamate or 10% imidacloprid WP, ​​1.8% albestrin, and 10% EC. 2000 times liquid, 667m2 spray good liquid 75kg. (5) During the flowering period of wheat, attention should be paid to preventing and controlling newly hatched nymphs. Can be sprayed with 2.5% creamer 2500 times or 10% Dagongchen wettable powder, 28% of active ingredient per 667m2, or 44% of Insecticide Cream 30ml per 667m2, spraying 60kg of water.
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