Management of Weeds in Direct Seedling Rice with Mixed Herbicides Florpyrauxifen-Benzyl and Cyhalofop

Abstract

Weeds are a bigger problem in direct seeding rice systems compared to conventional ones, because weeds germinate and grow at the same time as the rice. so it's more competitive. Chemical weed control with herbicides, if done with one active ingredient repeatedly, will cause resistance which threatens biodiversity. This research aims to determine the appropriate dose of the Florpyrauxifen-Benzyl and Cyhalofop mixture in controlling weeds in direct seeding lowland rice plants. The research was conducted in Sambi Village, Sambirejo District, Sragen Regency, Central Java in July - November 2023. The experiment used a complete randomized block design, the treatments were: (1) Florpyrauxifen-Benzyl dose 1000 ml/ha. (2) Florpyrauxifen-Benzyl dose 1250 ml/ha, (3) Florpyrauxifen-Benzyl + chyalofop dose 750 ml/ha + 1000 ml/ha, (4) Florpyrauxifen-Benzyl + chyalofop dose 800 ml/ha + 1000 ml/ha (5) Manual control and (6) no weed control. The experiment was repeated in 4 repetitions with an area of 100 m in each experimental unit2. Research result: Herbicide application Florpyrauxifen-benzyl alone and Florpyrauxifen-benzyl at a dose of 1000 ml/ha b.a. + cyhalofop-butyl dose 750 ml/ha b.a. does not cause poisoning in rice plants. Florpyrauxifen-Benzyl + chyalofop dose 800 ml/ha + 1000 ml/ha showed very mild poisoning and symptoms of poisoning were not visible 14 days after application. Herbicide application Florpyrauxifen-benzyl alone against E. cruis-galli and L. chinensis Some control is not satisfactory, while broadleaf weeds are controlled. The mixed herbicide Florpyrauxifen-Benzyl+chyalofop provides perfect control for all target weeds. The rice yield saved by the single application of the herbicide Florpyrauxifen is between 47.44% - 50.57%, while with the use of the mixed herbicide Florpyrauxifen-benzyl+ cyhalofop-butyl it is 52% -53, 28%.