Differential Tolerance of Hawaiian Sugarcane Cultivars to Diuron

Abstract

Hawaiian sugarcane cultivars(SaccharumL. hybrids) differed considerably in their tolerance to 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron). There was a greater concentration of diuron in the younger leaves of a sensitive cultivar, ‘H 53–263,’ compared with a tolerant cultivar, ‘H 50–7209′; degradation of diuron was more extensive in ‘H 50–7209′. The metabolites identified after applications of carbonyl-labeled diuron to the root system were 1-(3,4-dichlorophenyl)-3-methylurea (monomethyl-diuron) and 1-(3,4-dichlorophenyl)urea (demethylated diuron). Differences in diuron phytotoxicity to cultivars ‘H 53–263’ and ‘H 50–7209’ are at least partially explained by differences in the distribution and degradation of diuron.

Response of Sugarcane (Saccharumsp.) Cultivars to Preemergence Herbicides

“…Because of the heterozygosity of the species that are repre sented in the modern-day commercial cultivars, the potential for genetic diversity to traits such as herbicide tolerance exists, even in cultivars arising from the same cross. Cultivar differences in tolerance to surface-applied herbicides have been reported in South Africa for metribuzin (2), terbacil (7), hexa zinone (5,9,10,11), and for diuron [Af-(3,4dichlorophenyl)-N,N-dimethylurea] in Louisiana, Hawaii, and Taiwan (12,13,14).…”

Single Pesticide Volume: The Triazine Herbicides

“…WEISE and QUINBY (1969) observed considerable differences in the resistance of 60 sorghum varieties to propazine, with some evidence that resistance to this triazine was dominant in inheritance. OSGOOD et al (1969) found that interspecific hybrids within the genus Saccharum (sugarcane) differed substantially in their tolerance to diuron and ametryne.…”

Sugarcane (Saccharum spp.) Response to Azafeniden Applied Preemergence and Postemergence1

“…In Hawaii, researchers evaluating detoxification rates of diuron in sugarcane plants reported more rapid recovery from the effects of diuron with 'H 50-7209' than with 'H 53-263' (Osgood et al 1972). Other studies conducted in Hawaii documented differential tolerance among eight commercial varieties to several herbicides including 2,4-D, monuron, and diuron (Hanson 1962).…”