Inhibition of germination of sphacelial conidia of Claviceps africana following treatment of seedsphacelia admixtures with captan Academic Article uri icon


  • To assess the inhibitory effect of captan towards Claviceps africana conidia from sphacelia/sclerotia in seed admixtures, fresh sphacelia were washed, air-dried, mixed with sorghum seed. Captan was applied at 94 g a.i/100 kg seed. A red colorant was included with captan or was used alone as a control. Sphacelia were retrieved and intact sphacelia, or the central core tissues resulting from trimming, were plated in groups of 10 onto Kirchoff's agar. A drop of water was added to promote honeydew leaching and samples were incubated at 20C overnight. Secondary conidiation per sphacelium or core was evaluated on a 0-3 scale; germination incidence (percentage of total number with any associated secondary conidiation) was also calculated. Secondary conidiation per sphacelium was significantly inhibited in the captan-treated sphacelia, with the mean just below the experimental threshold of detection. Captan treatment also significantly reduced the proportion of sphacelia with germination. 2002 Elsevier Science Ltd. All rights reserved.

published proceedings

  • Crop Protection

author list (cited authors)

  • Frederickson, D. E., & Odvody, G. N.

citation count

  • 2

complete list of authors

  • Frederickson, DE||Odvody, GN

publication date

  • February 2003