Sensitivity of lettuce cultivar Lucy Brown to pre-planting herbicide application

ABSTRACT Due to the low availability of herbicide active ingredients, chemical weed management in lettuce crop is a challenge. The aim this study was evaluate sensitivity pre-planting application herbicides flumioxazin and trifluralin alone or tank-mixture lettuce, Lucy Brown cultivar. Two experiments were conducted. In experiment A, soil tilled before it again seedling transplanting. B, just once application. experimental design randomized blocks factorial scheme (3x3) +1 (2 factors with 3 levels an additional control) 4 replicates. We applied (120 g ha-1), (450 ha-1) + 450 three different seasons transplanting (0, 7 14 days). Lettuce productivity after (48.4 t higher than (16.8 A. decreased number leaves (25.6) at DAT; no differences verified, though. caused lower phytotoxicity most selective between treatments when both experiments.