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The Effect of Fallowing Obtained with Skip-Row Culture on Verticillium Wilt of Cotton¹

ABSTRACT

Skip-row production of cotton (Gossypium hirsutum L.), plant-4-rows-skip-4-rows, permits clean fallowing of the nonplanted rows. The fallow obtained from this cultural practice was effective in reducing Verticillium wilt (Verticillium dalhiae Kelb.) incidence, increasing yield, and improving fiber and seed quality. Irrespective of cultivar used during the 2-year study, cotton produced on plots fallowed for one season produced longer fiber with a higher micronaire reading. Seed quality was also improved in the single test where this variable was evaluated. Following a year of fallow, the onset of Verticillium wilt was delayed, it developed at a slower rate, and total wilt incidence was lower.

Key Words: Gossypium hirsutum • Verticillium dahliae • disease tolerance • cultural disease control

¹ Contribution from the Agricultural Research Service, USDA, and the Delta Branch of the Mississippi Agr. and Forest. Exp. Sta., Stoneville, Miss. Published as Journal Paper 2415 of the Mississippi Agr. and Forest. Exp. Sta.

² Research Plant Pathologist, ARS, USDA, Agricultural Research Center, BeltsviIle, Md. 20705. Present address is Area Director's Office, Starkville, Miss. 39759.

Received for publication June 23, 1972.