TY  - PRO
AU  - Devdariani,Sh
AU  - Bedoshvili,D.
AU  - Devidze,A.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT)
ED  - 
TI  - Using different herbicides in maize crop for no-till
U1  - 633.1147 
PY  - 2004///
CY  - Tbilisi (Georgia)
PB  - CIMMYT
KW  - Chemical control
KW  - Crop yield
KW  - AGROVOC
KW  - Cultivation
KW  - Herbicide resistance
KW  - Irrigated land
KW  - Maize
KW  - Water erosion
KW  - Weed control
KW  - Wind erosion
KW  - Tillage
KW  - Hybrids
KW  - CIMMYT
N1  - Abstract only
N2  - One of the approaches of no-till practice is the combination of minimum tillage and herbicide treatment. Such combination contributes to im- provement soil physical structure, increase of crop yield and reduction of inputs such as machinery, tools and labor. Application of chemical treatment in weed control is a firm basis for implementation of no-till. The minimum tillage cultivation creates real condi- tions for reducing effects of wind and water erosion. In 2001-2003 experiment has been carried out at the experimental station of Georgian RI of Agriculture, on brown-meadow irrigated soils. The specified area is located in a zone of wind erosion; therefore, we aimed at evaluation of the effects of herbicide treatment under the conditions of no-till. The experiment has been carried out using 4 alterna- tive treatments and 3 replications. Maize hybrid "Tserovani 1 ", developed in the institute, was selec- ted for the experiment. In the specified area the fol- lowing weeds are distributed: enchanter's nigh- tshade, bindweed, fat hen, guinea grass, and hemp. Herbicides Primextra, 2,4-D, Propazin and Utal were applied according to the following treatment patterns: -Primextra: spraying at a rate 5kg/ha 2-3 days prior to emerging of shoots at no-till soil. -2,4 D: spraying at a rate of 1.5 kg/ha at the stage of 4-5 leaves at no-till soil -Propazin: spraying at a rate of 3kg/ha 2-3 days prior to emerging of shoots at no-till soil -Utal: pre-sowing soil treatment at a rate 6kg/ha in October after harvest ofthe predecessor crop (wheat) Comparative evaluation of the no-till variants with chemical treatment an the check with culti- vation as per the common agricultural practice was carried out. Weed population observations were made for all trial variants at the different maize growth stages. Results ascertained reduction of weed popu- lations by 70% upon chemical treatment compared to 50% reduction observation for the standard mechanical soil cultivation. Highest effectiveness was ascertained for herbicide 2.4-D compared to other tested chemicals as per weed control extent so per providing to in- creased maize yield
ER  -