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Effect of Bacillus thuringiensis and a pyrethroid insecticide on the leaf microflora of Brassica oleracea
Author(s) -
Russell D.,
Chard J.,
McKinlay R.
Publication year - 1999
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1046/j.1365-2672.1999.00548.x
Subject(s) - bacillus thuringiensis , pyrethroid , cypermethrin , biology , brassica oleracea , bacillales , brassica , bacteria , pest analysis , bacillaceae , botany , pesticide , horticulture , agronomy , bacillus subtilis , genetics
In a field experiment comparing the effect of treatment with Bacillus thuringiensis (Bt) and the pyrethroid insecticide, cypermethrin, on leaf microflora across the growing season, no significant differences were found, apart from more bacteria on cypermethrin‐treated leaves on 24 September ( P < 0·05). No effect was seen on fungal diversity or numbers. In contrast, the pyrethroid insecticide inhibited growth of 44% of bacterial isolates tested in vitro; Bt was not inhibitory. Bacillus thuringiensis numbers on treated leaves increased throughout the season, following repeated applications.