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Comparative susceptibility of chironomid larvae (Dipt., Chironomidae) to Bacillus thuringiensis serovar israelensis with special reference to altered susceptibility due to food difference
Author(s) -
Kondo S.,
Ohba M.,
Ishii T.
Publication year - 1995
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1995.tb01256.x
Subject(s) - biology , chironomidae , bacillus thuringiensis , larva , chironomus , detritus , midge , zoology , botany , veterinary medicine , ecology , bacteria , medicine , genetics
Abstract Bacillus thuringiensis serovar israelensis exhibited larvicidal activities, with varying degrees, against detritusfeeding larvae of the six species belonging to the subfamily Chironominae (Dipt., Chironomidae): Chironomus kiiensis, Chironomus yoshimatsui, Dicrotendipes pelochloris, Glyptotendipes tokunagai, Paratanytarsus sp., and Stictochironomus akizukii. Of these, the most susceptible were C. kiiensis, C. yoshimatsui , and Paratanytarsus sp.; in these species a high/rapid mortality (70–100%) occurred within 2 days at a bacterial concentration of 17 μg/ml. The least susceptible was S. akizukii. The degree of difference in susceptibility ranged from 10 to 1000 times among the six species. There was a marked difference in susceptibility between two larval populations of a euryphagous species, Pentapedilum tigrinum , when reared on different foods prior to treatment; the larvae reared on aquatic plant tissue were 100 times more susceptible than the larvae fed on detritus.