It is the key to control the production of corn

In the late 1980s , maize was first discovered in Hebei Province, China. Since then, with the continuous improvement of mechanized farming, this pest has become common in Hebei Province, becoming the most important pest that restricts corn to increase yield. In turn, the damage is exacerbated, and the situation is serious and even leads to failure. It is important to carry out pesticide control without losing the opportunity to reduce losses.

Insect occurs in three generations a year, mainly in the second generation of harm, it happens every year in mid-June to early August, usually the summer corn seedlings hazards. By the end of mid-June, after the emergence of summer corn, eggs begin to hatch to become nymphs and then will move to the main summer maize crop root and soil near the inner surface of the sheath, the hazard. The damaged stems and leaves of the plants are yellow, and the leaves in the lower part of the plants appear dry and short, which makes the yield greatly reduced. The severe roots become thicker and the whole plants die and die. Because the nymphs clustered at the roots of the plants, there were many small black spots in the roots, which were swollen and the root tips were black and rotten.

How to identify this pest? The adult female larvae of the larvae of the genus Amaranth are between 3 mm and 4.21 mm wide and between 1.4 mm and 2.1 mm wide . They are oblong and slightly flat, and are approximately parallel on both sides, showing a reddish-brown color. There is white wax powder. The male adult body is about 1.42 mm long and 0.27 mm wide . The body is delicate and the whole body is dark brown.

Prevention and treatment recommendations: Among the three generations that have emerged , the second generation is the most critical generation for prevention and treatment. The eggs are highly resistant to the harsh environment. Female adults and 2nd instar nymphs are protected by wax powder and have strong resistance. Therefore, the best period of prevention and control is in the active larval stage. In addition to considering the techniques of rotation, ploughing, cultivating and weeding, the use of chemical control can effectively control its hazards. The author recommends using the medicinal preparation for root irrigation. It is recommended to use the ploughing sunflower powder 1000 灌 1000 1000 times in the second generation of the first instar larva stage , or use 500 with 1000 times liquid ethyl 1605 solution to cure the root.

 

 

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