Sipes B S, Schmitt D P
J Nematol. 1989 Jan;21(1):33-41.
The effects of alachlor (2.25 kg a.i./ha) and fenamiphos (2.25 kg a.i./ha) on the penetration and development of Heterodera glycines were examined on Glycine max cultivars Deltapine 105 planted 29 April, 29 May, and 29 June 1986 and Deltapine 105 and Centennial planted 15 May, 15 June, and 15 July 1987. Penetration was lowest on the third planting of soybeans and on fenamiphos-treated plants. Development from second-stage juveniles to adult females required 270 (1986) and 260 (1987) DD20/32 on roots from the first planting control and alachlor treatments. Fenamiphos, alone or with alachlor, retarded development in Deltapine 105 (1986) and in Centennial (1987). Males matured in roots from the second planting in 190 (1986) and 180 (1987) DD20/32 regardless of treatment or cultivar. No development occurred in roots from the third planting until 400 DD20/32 in 1986, but in 1987 development was similar to that in roots from the second planting. Nematode development was similar in alachlor-treated and control roots regardless of planting date. Fenamiphos restricted nematode penetration on most planting dates and slowed development. Simultaneous applications of alachlor and fenamiphos usually also inhibited development.
1986年4月29日、5月29日和6月29日种植的德尔塔平105大豆品种以及1987年5月15日、6月15日和7月15日种植的德尔塔平105和百年纪念大豆品种,研究了甲草胺(2.25千克有效成分/公顷)和苯线磷(2.25千克有效成分/公顷)对大豆胞囊线虫侵入和发育的影响。线虫侵入率在第三次种植的大豆以及苯线磷处理的植株上最低。从二龄幼虫发育到雌成虫,1986年第一次种植的对照和甲草胺处理的根部需要270日度(20/32℃),1987年需要260日度(20/32℃)。苯线磷单独使用或与甲草胺混用,延缓了德尔塔平105(1986年)和百年纪念(1987年)品种线虫的发育。无论处理方式或品种如何,1986年第二次种植的根部雄虫在190日度(20/32℃)时成熟,1987年在180日度(20/32℃)时成熟。1986年第三次种植的根部直到400日度(20/32℃)才有线虫发育,但1987年的发育情况与第二次种植的根部相似。无论种植日期如何,甲草胺处理的根部和对照根部的线虫发育情况相似。苯线磷在大多数种植日期限制了线虫的侵入并减缓了发育。甲草胺和苯线磷同时施用通常也会抑制发育。