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The bioactivities of destruxins against whitefly, Bemisia tabaci and its natural enemy, ladybird beetle Serangium japonicum were evaluated. Destruxins A and B (DA and DB) showed insignificant ovicidal, oviposition deterrent and systemic insecticidal activities to B. tabaci; however, DA and DB had certain contact virulence to its nymphs. The LC 50 values of DA at 120h to 2nd, 3rd and 4th instars...
The production levels of destruxin A and B (DA and DB) of 80 Metarhizium strains from China were investigated. The average yields of DA and DB were 14.87±2.30 and 3.65±0.58μg/mL, respectively. The strains isolated from soil had significantly (p<0.05) lower production of DA and DB than the strains isolated from insect cadavers. Also, there was a positive correlation in the yields of DA and DB, and...
Catalpol, an iridoid glycoside, contained richly in the roots of Rehmannia glutinosa, was found for the first time to be of neuroprotection in gerbils subjected to transient global cerebral ischemia. Catalpol (1mg/kg ip) used immediately after reperfusion and repeatedly at 12, 24, 48 and 72h significantly rescued neurons in hippocampal CA1 subfield and reduced working errors during behavioral testing...
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