Cikman, E. and Kaplan, M. and Cokun, Y.
(2008)
The effects of bacillus thuringiensis on larval serpentine leaf miners liriomyza
Cicerina (rondani, 1875) (dipetera: agromyzidae) in chickpea.
Journal of Applied Sciences Research, 4 (10).
pp. 1191-1198.
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Abstract
This study aimed to investigate the effects of Bacillus thuringiensis on Liriomyza cicerina
(Rondani) (Dipetera: Agromyzidae). L. cicerina is an important pest in chickpea growing areas in
ªanlýurfa, Turkey. Field trials were carried out in the experimental field of Faculty of Agriculture in
Harran University through the March to June in 2006 and 2007, employing randomized complete block
design with four replicates. B. thrungiensis Berliner was applied at a concentration of 60x106/mg Bacillus
thrungiensis spore. It was applied at the recommended rate of 75g/100 l water. Application dates were
set when the pest density reached a level of 2-3 larvae/leaf in 50% of plants in a field which are
economic threshold. The applications of insecticides were done the 3rd and 5th weeks throughout the
production periods, because the pest density reduced a level of 2-3 larvae/leaf in 50% of plants in a field.
Total applications of insecticides were done 2 times throughout the chickpea production period. The leaves
were sampled weekly from applications (Cyromazine and B. thuringiensis) treated and control plots and
kept in laboratory under observation to compare the number of emerging leaf miner adults and their
parasitoid species. Cyromazine and B. thuringiensis reduced leaf miners as compared to control plots. It
was determined that there was no difference between applications (Cyromazine, B. thuringiensis-treated
plots) for average numbers of adult and larvae statistically (P>0.05) but there was difference between
applications (Cyromazine, B. thuringiensis treated) and control plots statistically (P<0.05). On the other
hand, yield values for treatments were different from each other. There was difference between
applications and control plots for average yield statistically (P<0.01). The lowest yield was achieved on
control plots. The percentage of parasitization in the B. thuringiensis (Bt ) treated plots was higher than
Cyromazine treated plots, and the percentage of parasitization were 37.70-35.08% in the Bt and 15.79-
13.33% in the Cyromazine treated plots respectively.
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