Acute toxicities of 34 naturally occurring monoterpenoids were evaluated against 3 important arthropod pest species; the larva of the western corn rootworm, Diabrotica virgifera virgifera LeConte; the adult of the twospotted spider mite. Tetranychus urticae Koch; and the adult house fly. Musca domestica L. Potential larvicidal or acaricidal activities of each monoterpenoid were determined by to...

Concentration and composition of monoterpenoids in plant tissue affects a variety of environmental and ecological issues such as plant defenses, plant classification, and phytotoxicity. Developing the techniques for extracting and estimating the concentration and composition of monoterpenoids must be speciesspecific because monoterpenoid storage location varies between species. Ashe juniper f,J...

Twenty naturally occurring monoterpenoids were evaluated in a preliminary fumigation screening test on some important stored-product pest insects, including the rice weevil, Sitoplzilus oryzae, the red flour beetle, Tribolium castaneum, the sawtoothed grain beetle, 0rj)zaephilus surinamensis, the house fly, Musca dornestica, and the German cockroach, Blattella germanica. Cineole, 1-fenchone, an...

BACKGROUND Monoterpenoids are a large group of plant secondary metabolites. Many of these naturally occurring compounds have shown good insecticidal potency on pest insects. Previous studies in this laboratory have indicated that some monoterpenoids have positive modulatory effects on insect GABA receptors. In this study, the key properties of monoterpenoids involved in monoterpenoid binding ac...

Nine monoterpenoids related to carvone and seven glucosides were isolated from the water-soluble portion of the methanolic extract of the caraway (fruit of Carum carvi L.), and their structures were clarified by spectral investigation. Among them, eight monoterpenoids and six glucosides were new.

Terpenoids, such as hemiterpenoids and monoterpenoids, are the largest class of natural products, which widely exist in plants marine organisms. Herein, a divergent strategy is developed for introduction unnatural prenyl cyclic monoterpene skeleton through relay catalysis from basic feedstock isoprene. In presence catalytic amount base, prenylation heteroarenes proceeds Markovnikov addition ont...

Biogenic volatile organic compounds (BVOCs) have an important impact on atmospheric chemistry. Mixing ratio of BVOCs in different ecosystems been measured and discussed detail recent decades. However, field measurements from tropical Africa remain scarce. In this study, we present the mixing BVOCs, including isoprene, monoterpenoids, sesquiterpenes, bornylacetate, 2–methyl–3–buten–2–ol typical ...