Akademik Veri Yönetim Sistemi
EGYPTIAN JOURNAL OF BIOLOGICAL PEST CONTROL, cilt.23, sa.2, ss.233-240, 2013 (SCI-Expanded)
The carmine spider mite, Tetranychus cinnabarinus (Boisduval), is one of the most economically important pests of greenhouse-grown vegetables and ornamentals in southwestern Turkey (Antalya). The pest is generally controlled by repetitive applications of chemicals, resulting in environmental pollution and resistance in pest population. In this study, field efficacy of emulsifiable concentrate (EC) formulations of two entomopathogenic fungi, Beauveria bassiana strain PPRI 5339 and Metarhizium anisopliae strain F52 was evaluated against the mite on greenhouse-grown cucumbers in two consecutive growing periods, fall-winter 2010 and spring 2011. Only one trial was conducted for both fungal products in each growing season. Application rates are expressed in quantity of product delivered in 1000 1 of water/ha. The B. bassiana product (min. 4 x 10(9) conidia/ml) was applied at 1, 1.5, and 2 l/ha and the M anisopliae product (5.5 x 109 conidia/ml) at 0.75, 1, and 1.25 l/ha. The results showed that mortality rates of eggs and motile stages (larva, nymph and adult) of the pest varied with increasing time, and differences of the mortalities at each sampling date were generally significant among the different conidial concentrations of both fungal products. Whereas the B. bassiana product was particularly effective against eggs, causing 81.7% and 78.1% mortalities in 2010 and 2011, respectively; the M anisopliae product was more effective against motile stages of the pest, achieving 80.6% and 82.1% mortalities in 2010 and 2011, respectively. The results suggest that both fungal products have potential to be used to control T. cinnabarinus in greenhouses.