Effect of red clover on hatching and population density of Heterodera glycines (Tylenchida: Heteroderidae)

Abstract

In order to assess the efficacy of red clover as a trap crop of Heterodera glycines, rates of hatching of H. glycines eggs in the root leachate, penetration of red clover roots by H. glycines juveniles and their development in the roots, and the effect of planting red clover on soil infestation of H. glycines were investigated. The rate of hatching of H. glycines eggs in the root leachate from red clover was significantly lower than the rates in the leachate from host plants but significantly higher than the rates in distilled water and in the leachate from fallow soil (no plants) and non-host plants. The number of second-stage juveniles that penetrated red clover roots was similar to the number that penetrated soybean roots, but only a few second-stage juveniles developed into third-or fourth-stage juveniles and none developed into adults in red clover roots. The population density of H. glycines in soil in which red clover had been planted decreased significantly compared with that in fallow soil (no plants) in both pot and field plot tests. From the results of these experiments, it was concluded that the use of red clover as a trap crop is a promising method for controlling H. glycines. Jpn. J. Nematol. 32 (2), 69-76 (2002).

Expanding Red Clover (Trifolium pratense) Usage in the Corn–Soy–Wheat Rotation

“…Warnke et al found that red clover residue reduced hatching and nematode mortality at a rate equivalent to fresh plant material [85]. Kushida et al found that none of the nematodes that hatched in red clover roots developed into full adults [86]. Overall, in the proposed system, the extension of red clover into the corn phase of rotation could continue to protect corn from rootworm infestations while also further reducing soybean cyst nematodes prior to the soybean phase of rotation.…”

Farming System and Management

“…Red clover hatch the egg of SCN, but the hatched larva cannot become the adult (Kushida et al, 2002). Therefore, after red clover cultivation, the density of SCN decreased (Kushida et al, 2002). In Memuro continuous cropping experiment, SCN density decreased by 5 years continuous cropping of soybean.…”

“…In contrast, the leguminous crop red clover (Trifolium pratense) may be used as trap crop (Kushida et al, 2002). Red clover hatch the egg of SCN, but the hatched larva cannot become the adult (Kushida et al, 2002). Therefore, after red clover cultivation, the density of SCN decreased (Kushida et al, 2002).…”

“…By the planting of the single resistant variety, the races adapted to the resistant variety increased (Shimizu & Mitsui, 1985). In contrast, the leguminous crop red clover (Trifolium pratense) may be used as trap crop (Kushida et al, 2002). Red clover hatch the egg of SCN, but the hatched larva cannot become the adult (Kushida et al, 2002).…”

“…Soybean secretes flavonoids such as daidzein or genistein, and they are key signal compounds for control of symbiosis with rhizobia and AM fungi (Antunes et al, 2006). Glycinoeclepin which kidney beans (Phaseolus vulgaris) secrete promotes the hatching of the SCN (Kushida et al, 2002). Crops influence soil organism by various compounds to secrete from root (Faure et al, 2009).…”