Influences of Irrigation Practices on Spider Mite 1 Densities on Field Corn 2

摘要: Field corn plants grown with seasonal irrigations of 70 cb or less soil moisture tension, applied every furrow, supported fewer mites ( Oligonychus pratensis (Banks) and Tetranychus cinnabarinus (Boisduval)) showed lower levels plant stress than in plots kept dry (200 cb) at some time during the growing season. Mite densities remained low before tassel began increasing rapidly prior to soft dough. Prolonged rain thunder-storms caused reduced mite density. It was concluded that and/or instrument controlled ≤ 50 can limit growth severity spider populations on corn.