Russin J S, Layton M B, Boethel D J, McGawley E C, Snow J P, Berggren G T
J Nematol. 1989 Jan;21(1):108-14.
Short-term greenhouse studies with soybean (Glycine max cv. Bragg) were used to examine interactions between the soybean cyst nematode (Heterodera glycines) and two other common pests of soybean, the stem canker fungus (Diaporthe phaseolorum var. caulivora) and the soybean looper (Pseudoplusia includens), a lepidopterous defoliator. Numbers of cyst nematode juveniles in roots and numbers of cysts in soil and roots were reduced on plants with stem cankers. Defoliation by soybean looper larvae had the opposite effect; defoliation levels of 22 and 64% caused stepwise increases in numbers of juveniles and cysts in both roots and soil, whereas numbers of females in roots decreased. In two experiments, stem canker length was reduced 40 and 45% when root systems were colonized by the soybean cyst nematode. The absence of significant interactions among these pests indicates that the effects of soybean cyst nematode, stem canker, and soybean looper on plant growth and each other primarily were additive.
利用大豆(品种为 Bragg 的 Glycine max)进行的短期温室研究,来考察大豆胞囊线虫(Heterodera glycines)与大豆的另外两种常见害虫之间的相互作用,这两种害虫分别是茎溃疡病菌(Diaporthe phaseolorum var. caulivora)和大豆夜蛾(Pseudoplusia includens,一种鳞翅目食叶害虫)。有茎溃疡的植株根系中胞囊线虫幼虫数量以及土壤和根系中的胞囊数量均减少。大豆夜蛾幼虫造成的落叶则产生相反的效果;22%和 64%的落叶水平导致根系和土壤中幼虫和胞囊数量逐步增加,而根系中雌虫数量减少。在两项试验中,当根系被大豆胞囊线虫定殖时,茎溃疡长度分别减少了 40%和 45%。这些害虫之间不存在显著的相互作用,这表明大豆胞囊线虫、茎溃疡病菌和大豆夜蛾对植物生长以及彼此的影响主要是累加性的。