Abstract
AbstractThere is treated the combined apply of chemical and biological plant protection preparations as well as their reciprocal effect. Purpose of this work is to investigate the effect of the chemical preparation Fekamatribufon EC‐50 (butylat‐0,0‐dimethyl‐II‐butyryloxy‐2,2,2‐trichlorethylester of phosphonic acid) on the spores of Bacillus thuringicnsis, var. dendrolimus and var. Berliner. The electronic‐microscopical investigations determine that the chemical insecticid Fekamatribufon EC‐50 accelerates the lysying of the spore structural elements of investigated Bacillus strains. The results of these investigations prove the incompatibility of the preparation Fekamatribufon EC‐50 in concentrations of 0.6–1.2% (Water solution) when it is combined with the microbial preparations Dendrobacillin and Türicid.The above mentioned results present that the combined apply of chemical in ecticids with microbial preparations as plant protection means have obligatory to be preseded bysexact determination of their reciprocal effect.
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