Evaluation of some herbicides in clusterbean and their persistence
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Date
2010
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Publisher
CCSHAU
Abstract
An experiment was carried out under field and lab. /Screen house conditions at CCS HAU Hisar. In the field,
efficiency of different weed control treatments in clusterbean during kharif season of 2009-10 and their
carryover effect on mustard crop was analyzed. Among different rates of imazethapyr, pendimethalin, trifluralin,
pyrithiobac-sod and 2 HW weedings at 15 & 30 DAS, imazethapyr 80, 100 g/ha PRE and 100 g/ha 20 DAS
resulted in significantly higher yield, but imazethapyr 100 g/ha PRE and POST had residue problems for
mustard crop. So, imazethapyr 80 g/ha PRE may be used without much residue problems in the next cropping
season for mustard. Also pendimethalin/trifluralin 1.0 kg/ha PRE/PPI followed by 1 HW 20 DAS and 2 HW at
15 & 30 DAS were found equally effective in controlling weeds and yield optimization of clusterbean. In
lab/screen house study, persistence of trifluralin and imazethapyr affected by different temperature and moisture
regime, using bioassay technique was quantified. Bioassay plants for trifluralin and imazethapyr were oat and
mustard, respectively. Soils treated with above herbicides at different rates were incubated to 15, 25, 35 and
45OC temperature regimes in incubator and moisture incubations at 50%, 75% FC and FC at room temperature
for one month. Persistence of herbicides affected by temperature and moisture regimes at different herbicide
rates was measured by comparing the germination, shoot and root growth, fresh and dry weight to control
treatment, at different intervals. Among given regimes of temperature and moisture, trifluralin degradation was
maximum at 25OC and FC whereas, maximum degradation of imazethapyr was recorded between 35OC and
45OC and at 75 % FC.
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Keywords
Poultry equipment, Herbicides, Weeds, Crops, Planting, Mustard, Drying, Fruits, Vegetative propagation, Yields