Control of cotton seedling damping-off in the field by Burkholderia (Pseudomonas) cepacia

Abstract

Four field trials were conducted in April 1995 and 1996 in Arizona to compare the effectivenessof: 1, a soil drench of isolate D1 of Burkholderia (Pseudomonas) cepacia; 2, isolate D1 barleymeal formulation; 3, Deny seed treatment (a peat moss-based formulation of B. cepacia); 4,Deny soil drench; 5, Kodiak seed treatment (a formulation of Bacillus subtilis); 6, a mixture ofthree fungicides (metalaxyl, triadimenol, and thiram) seed treatment; and 7, a mixture ofmetalaxyl, triadimenol, thiram, and Kodiak seed treatment to increase cotton stand in the field.Except for D1, the other products are being marketed for the control of cotton seedling damp-ing-off. Only D1 soil drench and a mixture of the three fungicides seed treatment increasedcotton stand significantly (P ≤ 0.05) in three of four field trials.Additional keywords: biocontrolCorresponding author: I. J. MisaghiE-mail: misaghi@vmsa.ccit.arizona.eduAccepted for publication 18 October 1997.Publication no. D-1998-1222-03R© 1998 The American Phytopathological Society