Characterization of Lecanicillium psalliotae and Akanthomyces muscarium from Sunn pests (Eurygaster spp.)

Sunn pests, which can cause significant yield losses on wheat and barley, are one of the pests whose population levels should be followed. Overwintering areas, which have an important place in the biology of the insect, provide an advantage in the development of biological or integrated control with entomopathogenic fungi. Entomopathogenic fungi are one of the most important control agents in reducing the population in overwintering areas. In this study, one Lecanicillium psalliotae (KK8) isolate and one Akanthomyces muscarium (DIKA11/1) isolate were identified according to morphologic and molecular data. Pathogenicity test was carried out with DIKA11/1 A. muscarium isolate. Adult insects were inoculated with a 1×107 conidia/ml suspension. With this current study, A. muscarium was reported for the first time on sunn pests with 87.7% mortality rate. The L. psalliotae species, which is a pathogen on other insects and sunn pests, was isolated from the sunn pests and identified from Turkey. It is thought that DIKA11/1 A. muscarium isolate can be used in the biological control of this insect and commercial formulation development studies

Mortality of Isaria farinosa and Beauveria bassiana on sunn pests Eurygaster integriceps and Eurygaster austriaca

The effects of Isaria farinosa (Holm.) and Beauveria bassiana (Balsamo) on adult stages of sunn pests Eurygaster integriceps Puton and Eurygaster austriaca (Schrk.) were investigated at 27 +/- 1 degrees C, 95% r.h. and 16L:8D in the laboratory. Two concentrations, 1x10(6) and 1x10(8) conidia ml(-1), were used. Mortality of inoculated and non-inoculated adults was counted at 6, 9 and 12 days after treatment. Beauveria bassiana caused higher mortality of both species than I. farinosa. Neither caused significantly highmortality at 1x10(6) conidia ml(-1). Both were more pathogenic at 1x10(8) conidia ml(-1) and caused more than 85% mortality 12 days post treatment. Both were more pathogenic to E. austriaca

Mortality Effects of Isaria farinosa (Holm.) and Beauveria bassiana (Balsamo) Vuillemin (Sordariomycetes: Hypocreales) on Aelia rostrata Boh. (Hemiptera: Pentatomidae)

The effects of entomopathogenic isolates, Isaria farinosa (Holm.) and Beauveria bassiana (Balsamo) Vuillemin (Sordariomycetes: Hypocreales), were investigated on the adult stages of Aelia rostrata Boh. (Hemiptera: Pentatomidae) under of 70% and 95% relative humidity and with 1x10(6) and 1x10(8) conidial concentration (ml(-1)). These experiments were conducted in a climatic chamber with 27 +/- 1 degrees C and 16 h. light and 8 h. dark photoperiod, and the mortality percentages were determined in the 6th, 9th and 12th days of incubation. The result of experiments showed that both of the entomopathogens were more effective in 95% R.H. and 1x10(8) conidial concentrations (ml(-1)). At 70% R. H. and 1x10(8) conidial concentrations (ml(-1)), while I. farinosa caused 70% mortality in the 12th day of incubation, B. bassiana caused 100% mortality in the 9th day of incubation. It was concluded that B. bassiana isolate was more effective than I. farinosa isolate on wheat stink bug, A. rostrata