Changes of perennial grasses yield and weediness after herbicides treating
2001
Lapinsh, D. | Berzionsh, A. | Adamovichs, A. | Koroljova, E. | Sprincina, A. (Latvia University of Agriculture, Jelgava (Latvia). Dept. of Soil Management)
The aim of our research was to ascertain weed control resources and effectiveness on perennial grasses (Alopecurus pratensis, Dactylis glomerata, Lolium perenne, Festuca pratensis, Phleum pratense), because there are only some studies about that. Main hypothesis is that herbicides have influence on perennial grasses yield and root system. The research was carried out in the LUA Research and Study Farm "Peterlauki" in 1997-98, and there is observed herbicide post influence in 1998 and 1999. Trials were arranged on two different soil types: on fine sand soil and silt loam soil. Variants: 1.Control; 2.MCPA 750 - 2 l ha (-1); 3.Bazagran 480 - 3 l ha (-1); 4.MCPA - 1,2 l ha (-1) + Grodil 8 g ha (-1) + Citovet. Dry matter (t ha (-1) and per cent), weed amount (pieces m (-2), g m (-2) and per cent) and one root capacity (cm (3) and per cent) were contrelled in these trials. Results show that perennial weed amount is decreased in all variants, but the best herbicide was MCPA. Only then follows mixture of MCPA and Grodil, and Bazagran is the last one. Bazagran is not recommended for the use in fields of Festuca pratensis
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