Sensitivity of Verticillium dahliae to prochloraz and prochloraz-manganese complex and control of Verticillium wilt of cotton in the field

KURT Ş., Dervis S., Sahinler S.

Crop Protection, vol.22, no.1, pp.51-55, 2003 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 1
  • Publication Date: 2003
  • Doi Number: 10.1016/s0261-2194(02)00097-2
  • Journal Name: Crop Protection
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.51-55
  • Keywords: Cotton, Prochloraz, Prochloraz-manganese complex, Sensitivity, Verticillium dahliae, Wilt disease control
  • Hatay Mustafa Kemal University Affiliated: Yes

Abstract

Twenty-eight isolates of Verticillium dahliae from the cotton growing areas of Cukurova and Amik plains of Turkey were evaluated in vitro for their sensitivities to prochloraz and prochloraz-manganese complex. The fungicide sensitivity was determined by measuring mycelial growth on agar medium amended with prochloraz and prochloraz-manganese complex at dosages up to 100μgml-1. The mean ED50 values for both locations ranged from 0.2590 to 0.3574μgml-1 for prochloraz and 0.5239-0.8409 μgml-1 for prochloraz-manganese complex. The resistance factors for both fungicides were greater for the Cukurova than the Amik isolates. In field trials, the higher concentration of prochloraz (506 g a.i. ha-1) gave a slight reduction in disease severity. However, the higher concentration (1250 g a.i. ha-1) of prochloraz-manganese complex resulted in a significant effect (P = 0.05) on disease control. © 2002 Elsevier Science Ltd. All rights reserved.