SCREENING OF BACILLUS ISOLATES FOR POTENTIAL BIOCONTROL OF THE WILT DISEASE COMPLEX OF PIGEON PEA CAJANUS CAJAN UNDER GREENHOUSE AND SMALLSCALE FIELD CONDITIONS
Z.A. Siddiqui, U. Shakeel
Twenty isolates of unidentified Bacillus species were obtained from pathogen-suppressive soils of pigeon pea (Cajanus cajan) fields for the biocontrol of a wilt disease complex caused by Heterodera cajani; Meloidogyne incognita and Fusarium udum. Five isolates (B602; B603; B605; B615 and B618) were considered to have biocontrol potential on the basis of antifungal activity; inhibitory effect on the hatching and penetration of nematodes and colonization of pigeon pea roots by these isolates. The five Bacillus isolates were evaluated for biocontrol potential under pot conditions. Isolates B615 and B603 were found to be the most promising and should be further studied in field experiments.