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郑州地区麦长腿蜘蛛在干旱麦田种群动态规律性较强,可划分为点片侵入、低温抑制、回升、突增、突衰5个特征期;用lwao模型M*=α+βX和Taylor模型S2=axb判断,种群空间分布型属于聚集分布;不同药剂防治效果差异极显著,以4.5%乙敌粉防效最好。),表明呈聚集分布。2.2.2用Taylor幂指数法则S2=ax,从表1数据得S2=1.58x1.79(r=0.9593),a=1.58>lb=1.79>1,表明呈聚分布。2.2.3用CA值判断当CA=0随机分布,CA<0均匀分布,CA>0聚集分布,从表1看,CA值均大于0,呈聚集分布,用以上3种法则判断,3月下旬至4月中旬,麦长腿蜘蛛在田间呈聚集分布。2.3药剂防治试验结果表明,施药后24小时及5天防治效果比较,以4.5%乙敌粉撒毒土效果最好,虫口减退率分别为93.5%、97.58%。其次是双甲脒与速灭杀丁混配,防效达90%以上,但从成本看后者是前者的1/3,从总效益看还是后者合算。
In Zhengzhou area, the long-legged spider spider in the arid wheat field has a strong dynamic regularity and can be divided into five characteristic periods of spot invasion, low temperature inhibition, rebound, sudden increase and sudden decline. Using Lwao model M * = α + βX and Taylor model S2 = axb judgment, the spatial distribution of population belongs to the aggregation distribution; different medicaments have very significant difference in the control effect, with 4.5% beta enemy powder the best effect. ), Indicating an aggregate distribution. 2.2.2 Using the Law of Taylor Power Index S2 = ax, S2 = 1.58x1.79 (r = 0.9593), a = 1.58> lb = 1.79> 1 from Table 1, indicating a Poly-distribution. 2.2.3 Judging by CA value When CA = 0 randomly distributed, CA <0 is uniformly distributed and CA> 0 is aggregated and distributed. From Table 1, the CA values are all greater than 0 and show an aggregated distribution. Judging by the above three kinds of rules, From late March to mid-April, wheat long-legged spiders gathered in the field. 2.3 The results of chemical control tests showed that the control effect at 24 and 5 days after application was better than that of the control group with 4.5% B and E, and the reduction rates of the pests were 93.5% and 97.58% . Followed by amitraz and speed kill K mixed, anti-effect of more than 90%, but from the cost of the latter is the former 1/3, from the total efficiency of the latter or cost-effective.