Bostian A L, Schmitt D P, Barker K R
J Nematol. 1984 Jan;16(1):41-7.
Greenhouse and field experiments were conducted to determine the effects of phenamiphos and/or alachlor on early growth of soybean, root morphology, and infection and resurgence of Heterodera glycines (race 1). All tests were planted to 'Ransom' soybeans. In greenhouse experiments without nematodes, root growth was inhibited at 5 days by alachlor treatments and at 10 days by phenamiphos treatments; with nematodes, phenamiphos treatments enhanced root growth. Phenamiphos also suppressed early penetration of soybean roots by H. glycines in the greenhouse. Early soybean growth parameters among treatments were generally similar in the field. Nematode penetration was limited with treatments containing phenamiphos at one location. Plants treated with only alachlor had less nematode infection than did the control; however, plants treated with herbicide/nematicide combinations had more nematode penetration than did plants treated with phenamiphos alone. Alterations of root growth and interference with the efficacy of phenamiphos are two processes by which alachlor may enhance soybean susceptibility or suitability to H. glycines.
进行了温室和田间试验，以确定苯线磷和/或甲草胺对大豆早期生长、根系形态以及大豆胞囊线虫（1号小种）侵染和复发的影响。所有试验均种植‘兰塞姆’大豆。在没有线虫的温室试验中，甲草胺处理在第5天抑制根系生长，苯线磷处理在第10天抑制根系生长；有线虫时，苯线磷处理促进根系生长。苯线磷还抑制了温室中大豆胞囊线虫对大豆根系的早期侵入。各处理间大豆早期生长参数在田间总体相似。在一个地点，含苯线磷的处理对线虫侵入有一定限制。仅用甲草胺处理的植株线虫侵染比对照少；然而，用除草剂/杀线虫剂组合处理的植株比仅用苯线磷处理的植株线虫侵入更多。根系生长的改变以及对苯线磷药效的干扰是甲草胺可能增强大豆对大豆胞囊线虫易感性或适宜性的两个过程。
