8 ± 5.5%. Figure 1 Mean mortality of Formosan Decitabine ic50 subterranean termites by Isaria fumosorosea spore solutions. Bars on the same day with the same letter are not significantly different. M. anisopliae strain NRRL 30905 was isolated from dead FST alates and was found to be pathogenic to both FST alates and workers [7]. Spores were previously introduced to termites by individual inoculation [7]. Using the liquid exposure method it was found that on day 7 the 108 spores/ml concentration caused 57.5 ± 7.5%

mortality, which was significantly higher than the 3.8 ± 2.4% and 3.8 ± 1.25% mortality exhibited by the control and the 106 spores/ml concentration, respectively (Figure 2). On day 14, the control and 106 spores/ml concentration were again not significantly different at 6.3 ± 2.4% and 7.5 ± 1.4%, 5-Fluoracil cost respectively, while the 108 spores/ml concentration caused 77.5 ± 13.0% mortality. By day 21 the 108 spores/ml concentration had killed 100 ± 0% of the termites and the 106 spores/ml treatment, at 16.3 ± 4.3% mortality, was still not significantly higher than the control mortality which was 10.0 ± 0% (Figure 2). Figure

2 Mean mortality of Formosan subterranean termites by Metarhizium anisopliae spore solutions. Bars on the same day with the same letter are not significantly different. B. thuringiensis strain 33679 was selected from a culture collection for evaluation against FST. It was originally isolated from diseased insect larvae. Neither of the Bacillus treatments caused significantly higher mortality than the control on days 7, 14 or 21 (Figure 3). On day 21 the mortality rate was 23.8 ± 8.0% for the control, 23.8 ± 4.3% for the106 treatment and 23.8 ± 7.2% for the 108 treatment. On day 7 the control caused 5.0 ± 3.5% mortality, 106 cells/ml caused

7.5 ± 1.4% mortality, and 108 cells/ml caused 10 ± 2.0% mortality. On day 14, the mortality values for the control, the 106 and 108 treatments were 8.8 ± 4.3%, 11.3 ± 2.4% and 13.8 ± 1.3%, respectively. Figure 3 Mean mortality of Formosan subterranean termites by Bacillus thuringiensis spore solutions. Bars on the same day with the same letter are not significantly different. Each of the microbial agents was evaluated for the degree of non-repellency toward termites. Non-repellent agents are less likely to be detected and avoided by termites, thereby increasing the probability of causing a pathogenic effect [20]. Termites Thiamet G were tested by exposure to the three microbes in sand, soil and sawdust. The number of FST remaining in tubes containing an entomopathogen was compared to the number of termites remaining in control tubes following 24 hrs in a paired choice test. Repellency was evident by termite foraging behavior in treated arenas differing significantly from termite behavior in untreated controls. Non-repellency was reported as no statistical difference between the numbers of termites in tubes. There were no significant differences when termites were exposed to I.