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Multiple Chemical Treatment of Cotton Seed, Effects on Seedling Slurvival

Multiple chemical seed treatments which included fungicides and combination of systemic fungicides and insecticides were of value for pest control in cotton, Gossypium hirsutum L. Nonmercurial protectant fungicides were as effective as organic mercury compounds. Inclusion of a systemic fungicide in the treatment combination significantly increased plant survival. Inclusion of a systemic insecticide in the treatment combination resulted in consistent reductions in plant survival. Reduction in plant survival was minimized when a systemic fungicide was included in the treatment combination. Significant interactions between chemical treatments indicate a need to identify desirable combinations of chemicals for seed treatment.

Key Words: Fungicides • Systemic insecticides • Chemical interactions • Gossypium hirsutum L.

Received for publication May 2, 1970.