Other Contributions: Studies on Selected Hosts of Rotylenchulus reniformis and Its Pathogenicity to Soybean (Glycine max)

Abstract

Six plant species were tested for host suitability to Rotylenchulus reniformis: tomato (Lycopersicon esculentum), pigeon pea (Cajanus cajan) and water grass (Commelina elegans) supported large population increases but the nematode population declined under bermuda grass (Cynodon dactylon) after 10 wks. Significant reductions occurred in dry weights of tops and roots and linear growth of infected soybean plants 8 wks after transplanting into naturally infested soil. Initial larval inoculations of 500 and 1000 R. reniformis reduced the mean weights of roots by 44.7 and 53.7%, the tops by 37.0 and 54.7%, and linear top growth of soybean by 23.1 and 27.5 %, respectively, when compared with non-inoculated controls.