| chemical identification, electrophysiological and behavioral activities of the pheromone of metamasius hemipterus (coleoptera: curculionidae). | five hydroxylated aliphatic molecules were identified as the pheromone produced by male west indian sugarcane borer (wisb): 4-methyl-5-nonanol (1), 2-methyl-4-heptanol (2), 2-methyl-4-octanol (3), 5-nonanol (4) and 3-hydroxy-4-methyl-5-nonanone (5). electroantennographic recordings revealed antennal responses to compounds 1, 2, 3 and 4. significant eags were also recorded in response to pheromone compounds of weevils belonging to the same subfamily and structurally related to the wisb pheromone. ... | 1996 | 8733610 |
| transformation of presumptive precursors to frontalin and exo-brevicomin by bark beetles and west indian sugarcane weevil (coleoptera). | (z)-6-nonen-2-one (1) has recently been shown to be the biosynthetic precursor for the aggregation pheromone exo-brevicomin (2) in mountain pine beetle (mpb) males, dendroctonus ponderosae (hopkins). we tested the hypotheses that (1) 6-methyl-6-hepten-2-one (3) is the biosynthetic precursor for the aggregation pheromone frontalin (4) in the spruce beetle (sb), dendroctonus rufipennis (kirby), and (2) that frontalin and exo-brevicomin are produced from 3 and 1, respectively, only by beetles that ... | 1996 | 8733625 |
| pheromone-based trapping of west indian sugarcane weevil in a sugarcane plantation. | attraction of metamasius hemipterus (oliver) to gallon and bamboo traps baited with insecticide-treated sugarcane, the male-produced pheromone, 4-methyl-5-nonanol, and 2-methyl-4-heptanol is more efficient if ethyl acetate is added. the optimal traps are ground-level gallon traps baited with insecticide-laced sugarcane, pheromone, and ethyl acetate. capture rates of ground-level gallon traps are doubled by placing an insecticide-laced pad under the trap, but significantly decreased by placing th ... | 2002 | 12371817 |
| taxonomic redescription and biological notes on diaugia angusta (diptera, tachinidae): parasitoid of the palm boring weevils metamasius ensirostris and m. hemipterus (coleoptera, dryophthoridae). | diaugia angusta perty, 1833 is a neotropical species of tachinidae (diptera) reported here as a parasitoid of metamasius ensirostris (germar, 1824) and metamasius hemipterus (linnaeus, 1758) (coleoptera: dryophthoridae) in brazil. several species of dryophthoridae and curculionidae cause damage to bromeliad and palm species, and most are regarded as pests. in the present study, the male and female of diaugia angusta are morphologically characterized and illustrated to provide a means for the ide ... | 2011 | 21594164 |