12 documents found, page 1 of 2
Identification of acetates in Elasmopalpulus lignosellus pheromone glands using...
Jham, Gulab N.; Silva, Alexsandro A. da; Lima, Eraldo R.; Viana, Paulo A.Based on a specially created mass spectral database utilizing 23 tetradecenyl and 22 hexadecenyl acetate standards along with Kóvats retention indices obtained on a very polar stationary phase [poly (biscyanopropyl siloxane)] (SP 2340), (Z)-9-hexadecenyl acetate, (Z)-11-hexadecenyl acetate and (E)-8-hexadecenyl acetate were identified in active pheromone extracts of Elasmopalpus lignosellus. This identification...
Avaliação do comportamento reprodutivo e do feromônio sexual sintético de Mocis...
Lima, Eraldo R.; Vilela, Evaldo F.; Sanchez, Germán R.Durante a escotofase, fêmeas de Mocis latipes (Guenée) pousaram em superfícies verticais e iniciaram o comportamento de chamamento aos machos, abaixando levemente as asas, levantando o final do abdômen e protraindo o ovipositor. As fêmeas começaram a chamar a partir do 2º dia de idade, sendo o pico de chamamento no 4º dia. O início do chamamento aconteceu na 2ª hora da escotofase e o máximo de indivíduos chaman...
Evaluation of porous silica glasses as insect pheromone dispensers
Tiboni, Aline; Coracini, Miryan D. A.; Lima, Eraldo R.; Zarbin, Paulo H. G.; Zarbin, Aldo J. G.Este trabalho demonstra a viabilidade da utilização de vidros porosos como materiais para armazenar e liberar feromônios de insetos, visando o controle de pragas na agricultura. Feromônios de diferentes insetos foram impregnados em vidros porosos do tipo Vycor (PVG), e o material impregnado foi caracterizado por espectroscopia de absorção no infravermelho. A determinação da taxa de liberação do feromônio em lab...
Feromônios de insetos: tecnologia e desafios para uma agricultura competitiva n...
Lima, Eraldo R.; Zarbin, Paulo H. G.; Rodrigues, Mauro A. C. M.Pheromones are chemical compounds used by species to communicate intra and inter specifically. As strategy of integrated pest management (IPM), the use of these compounds allows the monitoring of target insects that results in more reliable interventions and consequently avoiding unnecessary use of pesticides. In certain crops these compounds are used as a control measure, not only monitoring. The Brazilian agr...
Insecticide toxicity to Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)...
Vianna, Ulysses R.; Pratissoli, Dirceu; Zanuncio, José C.; Lima, Eraldo R.; Brunner, Jay; Pereira, Fabrı́cio F.; Serrão, José E.The effect of nine insecticides used in tomato production was evaluated on adults of two Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) populations from Rive and Afonso Cláudio, Espírito Santo State, Brazil. The experiment was developed in an acclimatized chamber at 25 ± 1°C, 70 ± 10% relative humidity and 14 h photophase. Eggs of Anagasta kuehniella (Lepidoptera: Pyralidae), previously immersed ...
Pupal period affects calling behavior of the wheat moth, Pseudaletia sequax (Le...
Almeida, Ângela A.; Lima, Eraldo R.; Reis Jr, RonaldoThe effects of pupal period and age on calling behavior of virgin females of Pseudaletia sequax were determined. Calling behavior of groups of females of similar age of pupation was observed every 10 min for six calling days. Females were considered calling when they assumed a characteristic position: wings and abdomen elevated, displaying the ovipositor and presumably releasing pheromone. Calling behavior was ...
Sex pheromone of Lonomia obliqua: daily rhythm of production, identification, a...
Lima, Eraldo R.; Zarbin, Paulo H. G.; Lorini, Lisete M.; Ambrogi, Bianca G.; Vidal, Diogo M.The sex pheromone of Lonomia obliqua Walker (Lepidoptera: Saturniidae) was studied in the laboratory. All female calling occurred during the scotophase. Most females (70.6%) called first within 24 hr of eclosion. Calling varied with age of female, with older (5- to 6-day-old) females calling earlier in the scotophase and for longer durations than younger (0- to 1-day-old) females. The sex pheromone gland of 1- ...
Female sex pheromones in the host races and hybrids of the fall armyworm, Spodo...
Lima, Eraldo R.; McNeil, Jeremy N.The three major pheromone components found in gland extracts of both rice and corn strain Spodoptera frugiperda virgin females were Z9-14:Ac, Z11-16:Ac and Z7-12:Ac, However, both the concentrations and relative proportions of the compounds varied significantly between strains as a function of female age and the time during the scotophase that the glands were extracted. The concentration of Z9-14:Ac found in th...
Coffee leaf volatiles and egg laying by the coffee leaf miner Leucoptera coffeella
Magalhães, Sérgio Tinôco V.; Guedes, Raul Narciso C.; Lima, Eraldo R.; Demuner, Antonio J.Recent reports of coffee genotypes resistant to one of its key pests in the Neotropical region, the leaf miner Leucoptera coffeella (Lepidoptera: Lyonetiidae), sparked studies trying to recognize the underlying causes of resistance. An association between increased egg laying by the leaf miner and increased caffeine levels in coffee leaves was recently recognized. However, since caffeine is not volatile, its ef...
Identification (GC and GC-MS) of unsaturated acetates in Elasmopalpus lignosell...
Jham, Gulab N.; Silva, Alexsandro A. da; Lima, Eraldo R.; Viana, PauloTwo insect colonies of Elasmopalpus lignosellus were reared in our laboratory, the first being initiated from pupae obtained from a cornfield in the region of Sete Lagoas, Minas Gerais and the second from a cornfield in the region of Goiânia, Goiás. From the two colonies, two extracts were prepared from the pheromone glands of virgin E. lignosellus females. The extract obtained from the first colony was designa...