ABSTRACT
The wettability of several important nonionic surfactants on rice leaf surfaces was examined at the active tillering, and heading stages for eight rice varieties differing widely in characteristics of leaf morphology. Surfactants were chosen from homologous series of polyoxyethylene (POE) nonylphenyl ethers (NP), POE octylphenyl ethers (OP), POE sorbitans (sorbitans), and polystyrenated phenols (SP) having different ethylene oxide (EO) content and hydrophile-lipophile balance (HLB) value.
