Spider mite effects on yield and quality of four cotton varieties
T. F. Leigh, University of California
R. E. Hunter, University of California
A. H. Hyer
California Agriculture 22(10):4-5. DOI: 10.3733/ca.v022n10p4.
Spider mite, Tetranychus urticae (Koch), populations in three cotton varieties in 1966, and four in 1967 were measured under controlled and uncontrolled conditions and data on plant injury, mite abundance and yields were compared for each variety. The variety Pima S-2 (Gossypium barbadense) was affected very little by mites. Auburn 56 (G. hirsutum) was severely damaged in the absence of pesticidal controls. Acala 4-42 and Acala SJ-1 (G. hirsutum varieties) suffered an intermediate amount of damage and yield depression from an uncontrolled infestation of mites. Fiber quality was affected only in the Auburn 56 variety.
T. F. Leigh is Entomologist, Department of Entomology, University of California, Davis; R. E. Hunter is Laboratory Technician, Department of Entomology, University of California, Davis; A. H. Hyer is Research Agronomist, Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, U. S. Cotton Research Station, Shafter.