Cider gum (Eucalyptus gunnii Hook. F.), Monterey pine (Pinus radiata D. Don), and camphor tree [Cinnamonium camphora (L.) J. Presl] were evaluated in a field study comparing the effects of herbicides on tree growth. Trees were planted on 13 May 1983 and treated on 20 May 1983, 10 Apr. 1984, and 4 Oct. 1984 with simazine, oryzalin, napropamide, and oxyfluorfen. Glyphosate was applied as a postemergence treatment in all basins on 20 Mar. 1984. None of the herbicides injured the trees. Trunk circumferencesin treated plots increased as much as 553% over untreated plots. All species showed a positive response to increasing weed control. Chemical names used: 6-chloro-N,N'-diethyl-1,3,5-triazine-2,4-diamine (simazine); 3,5-dinitro-N4,N4-dipropylsulfanilamide (oryzalin); N,N-diethyl-2-(1-naphthalenyloxy)-propanamide (napropamide); 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene (oxyfluorfen); N-(phosphonomethyl)glycine (glyphosate).
Hunan Province Xinhuang Camphor Development Co., Ltd. and the Jiangxi ProvinceForest Research Institute, respectively. ‘Fireworks Camphor Tree’ is the second registered ornamental cultivar of Cinnamomum and is characterized by its drooping branches. As
), American chestnut ( Robichaud et al., 2004 ), fir species ( Salajová et al., 1996 ), camphor tree ( Shi et al., 2009 ), Indian kino tree ( Husain et al., 2010 ), and other species. Low ABA concentrations improved production in two different ways: 1) by