propyrisulfuron, a new sulfonylurea herbicide for rice - Wssp.org.pk

Shoot biomass(% of UTC, 3WAA)236 Hajime Ikeda et al., Propyrisulfuron, a new Sulfonylurea…Safety to ricePropyrisulfuron caused no practical damage against twocultivars of direct seeded rice at 50 and 200 g a.i./ha (Figure 7).Regarding transplanted rice, propyrisulfuron at 90 g a.i./ha has beenused in Japan and its safety was confirmed in public trials conductedby the Japan Association for Advancement of Phyto-Regulators.Table-2. Two-way ANOVA of the effects of the dose ofPropyrisulfuron (40 - 90 g a.i./ha) and the applicationpractice (described in MATERIALS AND METHODS andshown in Figure 2) on the biomass of Echinochloaoryzicola treated with Propyrisulfuron.FactorDegrees of Sum offreedom squaresF p-valueDose 1 0.0050 0.4833 0.5066Practice 1 0.1539 14.8699 0.0048Dose x Practice 1 0.0037 0.3585 0.5659Error 8 0.0828Total 11 0.2454120100806040200Nipponbare (japonica rice)Basmati 370 (indica rice)50 200Dose (g a.i./ha)Figure 7. Influence of Propysulfuron on rice growth by sprayapplication followed by flooding. Averaged data werepresented. The growth stage of rice at theapplication: Nipponbare, 3 - 4-leaf stage, 27 - 32 cmplant height; Basmati 370, 3 - 4-leaf stage, 20 - 24cm plant height.