Abstract
Nursery experiments were carried out to evaluate two different pre-emergence herbicides on germination, seedling growth and weed control efficiency of Jatropha nursery. Three days after sowing, pre-emergence herbicides viz. pendimethalin (30% EC) and fluchloralin (45% EC) were applied at different concentrations on the nursery bags using rose cane. Twenty days after application of herbicides, observations were made on germination percentage and 45 days after application of herbicides, parameters like number of predominant weeds (broad leaved, grasses and sedges), weed dry weight(g), weed control efficiency (%), germination (%), root length (cm), shoot length (cm) and dry matter production (g seedling-5) of Jatropha seedling in each treatment were recorded. The results revealed that the compatibility of application of pre-emergence herbicide of pendimethalin @ 0.05% - 0.10% can be used effectively to control broad leaved weeds, without impairing the germination and seedling growth of Jatropha curcas.
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