WEED CONTROL IN FIELD GROWN TUBEROSES (Polianthes tuberosa, L. .) CV. ‘DOUBLE’, IN THE WESTERN REGION ARID ZONE OF SAUDI ARABIA: B. MUTUAL INTERACTIVE EFFECTS OF IRRIGATION FREQUENCIES, MANUAL HAND WEEDING, AND HERBICIDES ON WEED POPULATION DENSITY, WEED GROWTH PERFORMANCES AND TUBEROSE CUT FLOWER YIELD

Abstract

A Split-Split-Plot field investigation, with four replicates, in Complete Randomized Block Design, was performed to confront weed competition problems, in field grown tuberoses, under the Saudi Arabian Western Region Arid Zone environmental conditions. Integrated weed management practices, under different irrigation frequency regimes, yielded highly significant two and three way interactions, during the 2001/02 and 2002/03 growing seasons.