| identification and molecular cloning of putative odorant-binding proteins from the american palm weevil, rhynchophorus palmarum l. | we have identified and cloned the cdnas encoding two odorant-binding proteins (obps) from the american palm weevil (apw) rhynchophorus palmarum (coleoptera, curculionidae). degenerate primers were designed from the n-terminal sequences and were used in polymerase chain reaction (pcr) in order to obtain full-length sequences in both males and females. in both sexes, two different cdnas were obtained, encoding 123 and 115 amino acid-deduced sequences. each sequence showed few amino acid difference ... | 2004 | 15303324 |
| interactions between acetoin, a plant volatile, and pheromone in rhynchophorus palmarum: behavioral and olfactory neuron responses. | aggregation of rhynchophorus palmarum weevils on host plants is mediated by a male pheromone (rhynchophorol: r) and host-plant volatiles (pvs) acting in synergy. synthetic pv blends synergizing pheromone contain acetoin (a) and ethyl acetate (etac). r, a, and etac are detected by specialized olfactory receptor neurons (orns). in addition, particular types of orns are tuned to both a and r. to specify the role played by acetoin in pheromone perception, we recorded the responses of orns to 100 ng ... | 2005 | 16222808 |
| structure and function of the antennal sensilla of the palm weevil rhynchophorus palmarum (coleoptera, curculionidae). | the distribution, fine structure and function of the sensilla present on the antennal club of rhynchophorus palmarum were studied. no sex dimorphism was observed. scanning and transmission electron microscopy showed five types of hair-like structures, four of which were evenly distributed on the antennal club. two types of hair (iv and v) showed wall pores, a characteristic of olfactory sensilla. the antenna numbers 11,190 +/- 3040 type iv and 7360 +/- 1500 type v hairs. using single sensillum r ... | 2003 | 16256688 |
| entomopathogenicity of native bacteria from anastrepha fraterculus and ceratitis capitata against the pest phyllocnistis citrella. | in piura (peru), the pest phyllocnistis citrella stainton damages the photosynthetic rate and new bud production of citrus aurantiifolia swingle (sweet lemon), decreasing the yield, productivity and commercial price of its fruit. biological control was evaluated through the crossed effect of bacteria obtained from pests (anastrepha fraterculus wied., ceratitis capitata wied. and rhynchophorus palmarum l.) that are pathogenic against their original host species. enterobacter cloacae (jordan) horm ... | 2007 | 17348070 |
| natural efficiency of parasitism by billaea rhynchophorae (blanchard) (diptera: tachinidae) for the control of rhynchophorus palmarum (l.) (coleoptera: curculionidae). | the occurrence of the tachinid parasitoid billaea rhynchophorae (blanchard) on larvae of the palm weevil rhynchophorus palmarum (l.) was evaluated in plantations of piassava palm (attalea funifera mart.) and african oil palm (elaeis guineensis jacquin), in southeastern bahia, brazil. the monthly percentages of parasitism were evaluated during 13 months, from november 2000 to november 2001, based on the comparison between the number of parasitized and non-parasitized cocoons of r. palmarum. mean ... | 2006 | 17348142 |
| nematodes of rhynchophorus palmarum, l. (coleoptera: curculionidae), vector of the red ring disease in coconut plantations from the north of the rio de janeiro state. | rhynchophorus palmarum, the palm weevil, has been reported as a pest of palms and sugarcane plants. the red ring disease is an infectious plant disease caused by nematodes. the etiological agent, bursaphelencus (rhadinaphelencus) cocophilus (nematoda: aphelenchoididae), completes its life cycle within 9 to 10 days inside the palm tree. the main symptom is a permanent wilting of the plant aerial parts. previous studies stated that b. cocophilus cohabits with other nematodes the gut of r. palmarum ... | 2008 | 18278512 |
| association of the red ring nematode and other nematode species with the palm weevil, rhynchophorus palmarum. | the palm weevil, rhynchophorus palmarum (l.), was collected in cocoons from red ring-diseased coconut palms (cocos nucifera l.) in trinidad and tobago. juveniles of five species of nematodes were extracted from the genitalia and macerated bodies of newly emerged adults of the palm weevil: rhadinaphelenchus cocophilus (cobb) goodey (the red ring nematode), teratorhabditis sp., diplogasteritus sp., mononchoides sp., and bursaphelenchus sp. over 90% of newly emerged weevil females and males were in ... | 1990 | 19287703 |
| teratorhabditis palmarum n. sp. (nemata: rhabditidae): an associate of rhynchophorus palmarum and r. cruentatus. | teratorhabditis palmarum n. sp., an associate of the palm weevils rhynchophorus palmarum and r. cruentatus is described. teratorhabditis palmarum was isolated from newly emerged adults and cocoons of r. palmarum from red-ring diseased coconut palms, cocos nucifera, in trinidad and ecuador, and from red-ring diseased oil palms, elaeis guineensis, in colombia. teratorhabditis palmarum was also associated internally with newly emerged adults of r. cruentatus from mature transplanted cabbage palmett ... | 1990 | 19287730 |
| purification and biochemical characterization of a specific beta-glucosidase from the digestive fluid of larvae of the palm weevil, rhynchophorus palmarum. | a beta-glucosidase was purified from the digestive fluid of the palm weevil rhynchophorus palmarum l. (coleoptera: curculionidae) by chromatography on anion-exchange, gel filtration, and hydrophobic interaction columns. the preparation was shown to be homogeneous on polyacrylamide gels, beta-glucosidase is a monomeric protein with a molecular weight of 58 kda based on its mobility in sds-page and 60 kda based on gel filtration. maximal beta-glucosidase activity occurred at 55 degrees c and ph 5. ... | 2009 | 19611239 |