| characterization of the imaginal reproductive diapause of oebalus poecilus (dallas) (hemiptera: pentatomidae). | the state of development of the internal reproductive organs of male and female oebalus poecilus (dallas) as well as the body fat amount in the abdominal cavity during hibernation, of individuals sampled in bamboo litter in eldorado do sul (30 masculine 02's and 51 degrees 23'w), rs, brazil was investigated. females and males showed the abdominal cavity filled with body fat in the beginning of the hibernation phase. the decrease in fat reserve level occurred from august on for males and from oct ... | 2004 | 15029381 |
| bacillus thuringiensis monogenic strains: screening and interactions with insecticides used against rice pests. | the screening of bacillus thuringiensis (bt) cry proteins with high potential to control insect pests has been the goal of numerous research groups. in this study, we evaluated six monogenic bt strains (bt dendrolimus hd-37, bt kurstaki hd-1, bt kurstaki hd-73, bt thuringiensis 4412, bt kurstaki nrd-12 and bt entomocidus 60.5, which codify the cry1aa, cry1ab, cry1ac, cry1ba, cry1c, cry2a genes respectively) as potential insecticides for the most important insect pests of irrigated rice: spodopte ... | 2012 | 24031872 |
| absolute configurations of zingiberenols isolated from ginger (zingiber officinale) rhizomes. | two stereoisomeric zingiberenols in ginger were identified as (3r,6r,7s)-1,10-bisaboladien-3-ol (2) and (3s,6r,7s)-1,10-bisaboladien-3-ol (5). absolute configurations were assigned by utilizing 1,10-bisaboladien-3-ol stereoisomers and two gas-chromatography columns: a 25 m hydrodex-β-6tbdm and 60 m db-5ms. the c-6 and c-7 absolute configurations in both zingiberenols match those of zingiberene present abundantly in ginger rhizomes. interestingly, zingiberenol 2 has recently been identified as a ... | 2015 | 26606508 |
| zingiberenol, (1r,4r,1′s)‑4-(1′,5′-dimethylhex-4′-enyl)-1-methylcyclohex-2-en-1-ol, identified as the sex pheromone produced by males of the rice stink bug oebalus poecilus (heteroptera: pentatomidae). | bioassays using an olfactometer showed that oebalus poecilus males produce the sexual pheromone, and the chemical analysis demonstrated that this compound is zingiberenol. two groups of isomers, each containing four diastereoisomers, (1rs,4rs,1's)- and (1rs,4rs,1'r)-zingiberenol, were prepared. these diastereoisomers were not separated on a chiral gc column. therefore, to determine the absolute configuration of the carbon 1, 4, and 1' of zingiberenol produced by males, the following strategies w ... | 2013 | 23879882 |
| seasonal abundance and mortality of oebalus poecilus (dallas) (hemiptera: pentatomidae) in a hibernation refuge. | oebalus poecilus (dallas) is an important pest affecting irrigated rice in rio grande do sul, brazil. it hibernates during the coldest months of the year in refuges such as bamboo litter. this study examined o. poecilus hibernation to determine the causes of mortality during this period. the study was conducted in a 140 m(2) bamboo plantation located in a rice-growing area in eldorado do sul county (30 degrees 02 s and 51 degrees 23 w), rs. during june 2000 to april 2002, 63 samples of litter we ... | 2006 | 16862299 |