Sipes B S, Schmitt D P
J Nematol. 1989 Jan;21(1):24-32.
A series of greenhouse experiments was conducted to elucidate the postinfection development of Heterodera glycines in response to applications of alachlor and fenamiphos. The rate of H. glycines maturation on a susceptible soybean cultivar was not altered by 1.0 mug alachlor/g soil but was completely inhibited by 1.0 or 1.5 mug fenamiphos/g soil. An alachlor-fenamiphos combination allowed development after an initial 300-degree-day delay. Nematode maturation on the resistant soybean cultivar Centennial with 1.0 mug alachlor/g soil was similar to that observed on an untreated resistant control. Twice as many females matured on Centennial plants growing in alachlor-treated soil as on untreated Centennial plants. Fenamiphos in combination with alachlor (1.0 mug a.i./g soil) allowed development on Centennial at half the rate of the resistant control. This antagonism between alachlor and fenamiphos on development may help to explain late season population resurgence of H. glycines observed with field application of these pesticides.
进行了一系列温室试验，以阐明在施用甲草胺和苯线磷后大豆胞囊线虫的感染后发育情况。在易感大豆品种上，1.0微克甲草胺/克土壤不会改变大豆胞囊线虫的成熟率，但1.0或1.5微克苯线磷/克土壤会完全抑制其成熟率。甲草胺和苯线磷组合使用时，线虫发育会在最初延迟300度日之后继续进行。在含有1.0微克甲草胺/克土壤的抗性大豆品种“百年纪念”上，线虫的成熟情况与未处理的抗性对照相似。在甲草胺处理土壤中生长的“百年纪念”植株上成熟的雌虫数量是未处理的“百年纪念”植株上的两倍。苯线磷与甲草胺（1.0微克有效成分/克土壤）组合使用时，“百年纪念”上的线虫发育速度为抗性对照的一半。甲草胺和苯线磷在发育方面的这种拮抗作用可能有助于解释在田间施用这些农药后观察到的大豆胞囊线虫后期种群复苏现象。
