The scientific name is Oscinella frit (Linnaeus) Diptera, Syringidae. Alias ​​Swedish wheat fly. Distribution from the north of Inner Mongolia, Xinjiang, the southern limit slightly over the Yellow River, Tai'an, Shandong, Shaanxi Zhenba, east of the Bohai Sea, west Gansu, Xinjiang arrived in Kashgar. Shandong Zibo, Hebei Bashang, Shanxi, Gansu, Ningxia and Qinghai wheat areas are all common.
Hosts wheat, barley, rye, oats and corn.
The larvae are damaged by damage to the heart or young ears, and the affected area withers or dies. The victim was heavier before giving birth. One generation usually harms the spring wheat seedlings, the second generation damages oat ears, and the third generation damages winter wheat.
Morphological characteristics The adult body is about 1.8mm long, and the whole black is light and thick. Pronotum black. Antennae black, white kiss, transparent wings. The festival is black and the money is brown. Egg white long cylindrical, with a significant longitudinal groove and longitudinal ridge. The last-instar larvae were 4.5 mm in length with a small front end and a round distal section with 2 short protrusions at the end. The newly hatched larvae are as transparent as water and become cylindrical, mature, yellowish-white, and guillotine-like when mature. It is 3mm long, tan, cylindrical, with 4 small protrusions at the front and 2 at the back.
Habits of life 3-4 generations, the mature larvae in the winter crops or wild grass stems overwintering. In the following year, when the ice melts, it phlegm. After 20 days, it emerges as the first generation of adults. After 10 to 38 days, the eggs are laid.
70 eggs, prolific in the two or three leaves of the seedling stem or ligule and leaf surface or slightly on the leaves, occasionally produced in the soil or ear. The newly hatched larvae invade the stems, feed on the lower part of the heart or ear buds, make them wither and phlegm in these areas. Complete a generation of 22-79 days.
See control methods for wheat stalk flies.
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