Full Text
(7 K)

Boll Dangle, Causing Serious Yield Losses in Southeast Arkansas

C.M. Coker, C.T. Allen and K.R. Williams


An unusual boll loss, "boll dangle," has been observed in southeast Arkansas since 1995. Boll dangle has previously been referred to as Phomopsis boll rot, atypical boll shed, cotton blossom-boll rot and as a physiological disorder. Boll dangle appears not to be a boll rot, but a unique boll shed. Boll dangle affects newly formed bolls as well as thirty day old bolls and possibly older bolls. The initial symptoms of boll dangle appear as a subtle bleaching or discoloration of the stem tissue surrounding the base of the boll peduncle and extending down the stem. A well-defined canker(2-5mm x 10-30mm in size) develops on the stem at and below the boll peduncle base. The stem tissue within the canker abscise and rapidly becomes necrotic. The developing boll dies, the tissues harden, and the boll remains attached to the stem by an ever-weakening peduncle. A dead boll may dangle from a stem canker for several weeks until it drops from the plant. The objectives of this research were to identify cultivars and the areas within Arkansas affected by boll dangle and the possibility of foliar applications to control boll dangle.

Reprinted from Proceedings of the 1998 Beltwide Cotton Conferences pp. 163 - 164
©National Cotton Council, Memphis TN

[Main TOC] | [TOC] | [TOC by Section] | [Search] | [Help]
Previous Page [Previous] [Next] Next Page
Document last modified Sunday, Dec 6 1998