Splash application with pyriftalid/cinosulfuron improves efficiency and user safety in wet-sown rice in Southeast Asia
2001
Lojo, H. | Saavedra, N. | Sribuddhachart, J. | Wongyala, P. | Lim, F.W. | Sairi, M.H. | Zulkarnain, I. | Burhan, H. | Ohtomo, H. | Kon, K.F. and Allard, J.L.
Weeds are one of the major constraints in wet-sown rice in Southeast Asia. The aging of the farming population and shortage of farm labor are causes of poor weed control in rice. This study investigated the splash application technique, using pyriftalid/cinosulfuron WG 40.8, as a simple and easy application technique for herbicides. Splash application of pyriftalid/cinosulfuron at 113-150 g ai ha-1 at 6-8 days after sowing controlled more than 90% of grasses including Echinocloa crus-galli, Leptochloa chinensis, and Ischaemum rugosum. Cinosulfuron in this ready-mix formulation broadened the weed control to cover many key sedges and broadleaf weeds such as Cyperus difformis, Cyperus iria, Fimbristylis miliacea, Monochoria vaginalis, Sphenoclea zeylanica, Ludwigia spp., Limnocharis flava, and Marsilea crenata. The product, applied by "splash", showed excellent safety for rice. The crop stand was high and exceeded that of the check plots treated with herbicide in the spray form. The splash technique requir d 56% less time to apply the herbicide than the current standard method of using mist-blowers. With the splash method, farmers carry only 0.5 L of water compared with 15-20 L of water in addition to the 10 kg mist-blower on their back. The splash technique is simple, easy to use, and fast. It requires no spray equipment and improves farmers' efficiency and applicator dafety. The significant productivity improvement indicates that pyriftalid/cinosulfuron fits well in wet-sown rice in Southeast Asia.
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