"Rhizoma rhizome" is a new pest found in our province that harms the base of wheat stems. Because it is a new culprit, it lacks the necessary basic research and clear and effective control techniques such as the law of occurrence, epidemiological factors, and even "wheat rhizome grass". The name of “螟†is the tentative name of our province. Both farmers and technicians lack experience in prevention and control. Last year, there were 6,000 mu of land in our province. There are 5 to 20 larvae per ridge of wheat in severe plots. Despite the emergency prevention and control, the area of ​​damage this year is still expanding. After the wheat is damaged, it can cause the stalk to break, and the wheat seedlings wilting and die, forming a lack of seedlings and ridges, and the damage symptoms are easily confused with common ground tigers and other underground pests.
1. Damaged symptoms The stems or leaves of wheat stems are hole-shaped. Pull out the wheat seedlings and look closely. There are fresh hole-like wounds on the stem base of wheat. Only the surface leaf sheaths may be damaged, or voids may appear, and even the entire stem strains may be nicked. Generally, Larvae can be found around the hole. The wounds of the upper leaves were formed by multiple rows of holes, and the surrounding tissues of the holes had already died of yellow withering, and the field showed a lack of seedlings.
2. Control methods After preliminary tests, 48% chlorpyrifos emulsifiable concentrate or 4.5% beta-cyfluthrin EC was applied to the stem base of wheat to effectively control wheat rhizome grasshopper.
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