Influence of weed vegetation on number of the Eurygaster integriceps Put. and it entomophags in arovalue a winter wheat
2008
Glazunova, N. N., Stavropol State Agrarian Univ. (Russian Federation)
The weed vegetation in agrorvalue a winter whear influenices not only on cultural plants, but also influnces on othher components consortsia. We carried out researches on influence of degree of a contamination on number of wreckers of a winter wheat and their entomaphags and as influence of a contamination on contamination of wreckers parasites and parities a predator - a victim. During 2003-2006 in the collective farm Novomarevskaya of the Satvropol area have bееn put in pawn experienc with grade Bezostaya1 on 3 degrees of а соntamination. Presence of weed vegetation in agrovalues a winter wheat promotes increase in number of Eurygaster intergriceps Put. from 14 % to 133 %. In our opinion it occurs because maturing of the littered crops passes more slowly and winter wheat plants in these agrovalues can longer serve a forage reserve for a bug harmful turtles. Number entomophags harmful turtles has other tendency, at average degree of a contamination we marked in different phases of development number increase fazii by 9-20%, at strong degree of a contamination on the contrary their number decreased on 10-34%. The increase fazii at average degree of a contamination was promoted by forage reserve presence (blossoming-weed vegetation). Decrease at strong degree of a contamination in our opinion connect with concentration reduction excretion at strong degree of a contamination in a place with fitoaleksins wheat is allocated a considerable quantity fitoaleksins accompanying weed vegetal
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