The Investigation On Occurrence Regularity Of Tobacco Aphid And The Research Of Prevention Technology Of The County Gu Zhang

This study through the investigation and prevention technology research Guzhang County tobacco aphid occurs, the system analyzes the variation of the number of aphid populations Guzhang discussed spraying insecticides on tobacco aphid control effect, also studied yellow board control aphids. The effect has been the basic law of Guzhang County aphid occurrence and appropriate control measures, provide theoretical guidance for Guzhang County tobacco aphid control. The results showed that:tobacco aphid population fluctuation curve showed a single peak curve, two field variation tobacco aphid populations are basically the same, the peak period, the two difference within 10 days. Wingless aphids reached a peak in late June, winged aphids reached a peak in early July. Aphid population distribution is not evenly distributed in the horizontal plane, in a horizontal plane mainly in the southwest corner of the aphid population in higher amounts, to the northwest corner of the lower number of aphid populations. Winged aphids migration field there are two peak periods, the first peak is at around the beginning of June, the second peak around late June to early July. Spraying Acetamiprid 5% can significantly improve the economic traits of the indicators, which was the best control of tobacco aphid. After setting the yellow board trap aphids, tobacco aphid population can be suppressed to a certain extent, in favor of growth and development of tobacco, reduce the incidence of tobacco virus disease, increase production in a certain range and improve the quality of tobacco leaves.