Efficacy of cyhalofop-butyl alone and in combination with 2,4-D against mixed weed flora in direct-seeded upland rice (Oiyza sativa)

Abstract

Listen

Translate article

A field experiment was conducted during the rainy seasons of 1998 and 1999 at Agronomy Research Farm of the CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, to find out the best combination of cyhalofop-butyl and 2,4-D in controlling mixed weed flora in direct-seeded upland rice (Oryza sativa L.). Cyhalofop-butyl 90 and 120 glha when tank mixed with 2,4-D 1.0 kglha lost its herbicidal property completely and did not control any of the grass weeds. However, 2, 4-D in mixture controlled broad-leaf weeds completely, When these herbicides were applied in sequence both grass and broad-leaf weeds were controlled effectively. Cyhalofop-butyl 120 glha (1 5 DAS) followed by 2, 4-D 1.0 kglha (20 DAS) and 2, 4-D 1.0 kglha (15 DAS) followed by cyhalofop-butyl 120 glha (20 DAS) being at par with each other and also with hand-weeding twice resulted in significantly lower weed dry weight and hence higher yield attributes and yield of rice over all other treatments.