Greenhouse experiments were conducted to determine effects of AC 94,377, seed depth, and commercially applied seed protectants on emergence and early growth of grain sorghum. Mean height of grain sorghum was increased by 500 to 2000 ppmw AC 94,377 but not by 250 ppmw. Emergence and fresh weight of grain sorghum was not affected. Plants arising from seeds without protectants were taller and heavier than those with protectants intact. Soybean sown in soil containing AC 94,377 at 0.6 to 2.5 kg ai/ha was injured; however, soybean grew normally if seeds were not sown until at least 1 week after applying AC 94,377. Cotton was not injured by AC 94,377.

Hemp sesbania interference in cotton was investigated in the greenhouse and in a 2-yr field experiment at Stoneville, MS. In greenhouse experiments, cotton and hemp sesbania heights and plant dry weights (PDW) were not different in ratios of cotton to hemp sesbania of 4:0, 2:2, 1:3, and 0:4 at 3 and 5 wk after emergence (WAE). Hemp sesbania PDW were less for ratios of cotton to hemp sesbania of 3:1 when compared to hemp sesbania PDW of other ratios. Early season cotton seedling vigor and growth (0 to 28 DAP) were not affected by 32 000 hemp sesbania plants ha-1 (3 plants m of row-1). Hemp sesbania plants were hand removed 28, 42, 56, 70, and 84 d after planting (DAP). White cotton blooms and yields were reduced when hemp sesbania plants were not removed by 70 DAP. Seed cotton yields were 2590, 2570, 2460, 2030, 1610, and 1070 kg ha-1 for hemp sesbania removed at 28, 42, 46, 70 and 84 DAP or not removed, respectively. The critical period of weed control or removal of hemp sesbania in cotton is ≤62 DAP.