10 documents found, page 1 of 1
Efeitos de fungicidas sobre os aspectos biológicos de Aphis gossypii Glover, 18...
Zaché, Ronelza Rodrigues da Costa [UNESP]; Carvalho, Geraldo Andrade; Zaché, Bruno [UNESP]; Carvalho, César Freire; Pereira, Rosane Rodrigues da CostaSubmitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:03:39Z No. of bitstreams: 1 S1413-70542010000600011.pdf: 1393309 bytes, checksum: 38bdf12566ae43972e62257cba9023b6 (MD5); Made available in DSpace on 2013-08-22T19:03:39Z (GMT). No. of bitstreams: 1 S1413-70542010000600011.pdf: 1393309 bytes, checksum: 38bdf12566ae43972e62257cba9023b6 (MD5) Previous issue date: 2010-12-01; Made availa...
Influence of rainfall on abundance of mites in coffee plants
abreu, Fernanda aparecida; Reis, Paulo Rebelles; Marafeli, Patricia de Padua; Silva, Rogério Antonio; Bernardi, Leopoldo Ferreira de OliveiraThe coffee plant Coffea spp. suffers pest attack, which according to climatic conditions present in the culture system can reduce fruit production. Rainfall is considered an important natural factor in the regulation of arthropods populations. The objective of this study was to evaluate the effects of rainfall during the seasons, on the occurrence of the main species of mites in coffee. The experiment was carri...
Survival analysis applied to the development of Aphis gossypii Glover, 1877 (He...
Zaché, Ronelza Rodrigues da Costa; Carvalho, Geraldo Andrade; Cirillo, Marcelo Ângelo; Carvalho, César Freire; Zaché, BrunoIt was aimed to evaluate the influence of fungicides utilized in cucumber on the development of the aphid Aphis gossypii Glover under greenhouse conditions. The experimental design was completely randomized with four treatments and 45 replicates, being each plot consisting of a first instar nymph coming from an apterous female in early reproductive period. The fungicides utilized and their respective dosages at...
Effects of acaricides used in coffee crops on the eggs and subsequent stages of...
Vilela, Michelle; Carvalho, Geraldo Andrade; Carvalho, César Freire; Vilas Boas, Matheus AlvarengaOne of the most common predatory species in coffee agrosystems is Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae). Its maintenance, however, depends on the application of non-toxic pesticides. Thus, bioassays were carried out in laboratory conditions to evaluate the selectivity of the acaricides spirodiclofen (Envidor – 0.12 g a.i.L-1), fenpropathrin (Meothrin 300 – 0.15 and 0.30 g a.i.L...
Biological aspects of Chrysoperla externa (Hagen) preying on Oligonychus ilicis...
Neto, Marçal Pedro; Carvalho, César Freire; Reis, Paulo Rebelles; Santa-Cecília, Lenira Viana Costa; Souza, Brígida; Alcantra, ElianaThe red mite Oligonychus ilicis (McGregor, 1917) and the mealybug Planococcus citri (Risso, 1813) are considered important pests of the coffee plant (Coffea arabica L.), causing yield losses. The predator Chrysoperla externa (Hagen, 1861) is associated with those pests. The objective of this work was to evaluate the development of the immature and adult phases of the predator fed, in the immature phase, on thos...
Effect of temperature on biology of Myzus persicae (Sulzer) (Hemiptera: Aphidid...
Barbosa, Leonardo Rodrigues; Carvalho, César Freire; Souza, Brigida; Auad, Alexander MachadoThe influence of constant and variable temperatures on biology of M. persicae in sweet pepper was evaluated. The nymphs were individualized on pepper leaf discs and maintained in Petri dishes at constant temperatures of 15, 20, 25, and 30ºC. In greenhouse the temperature was variable with an average of 24.9ºC and the nymphs were kept in appropriate cages and fixed in sweet pepper leaves. The experimental design...
Influence of the density of Myzus persicae (Sulzer) on the biological aspects a...
Barbosa, Leonardo Rodrigues; Carvalho, César Freire; Souza, Brigida; Auad, Alexander MachadoThe influence of different densities of Myzus persicae (Sulzer) reared on sweet pepper leaves, Capsicum annuum L., was evaluated on biological aspects and on the predatory capacity of Chrysoperla externa (Hagen). The newly emerged larvae of predator were fed with aphid nymphs, offered in the densities of 50% below the average daily consumption, 50% above that consumption, and on sweet pepper foliar discs mainta...
Biological aspects and predatory potential of Chrysoperla externa (Hagen) fed o...
Auad, Alexander Machado; Carvalho, César Freire; Souza, Brígida; Trevizani, Raphael; Guimarães, Cecília Maria Ribeiro FonsecaThe biological aspects and predatory potential of Chrysoperla externa (Hagen) larvae fed on the fourth instar nymphs of Bemisia tabaci (Gennadius) biotype B at densities of 100, 160, 220 and 280 were evaluated. The trials were conducted at 25±1ºC, 70±10% RH and 12h photophase. The development period of the first, second and third instars of C. externa larvae did not differ in relation to the prey density and th...
Predatory capacity of Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopida...
Silva, Rogério Antônio; Reis, Paulo Rebelles; Carvalho, César Freire; Souza, BrígidaChrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) is present naturally in many plants, as a natural enemy with a high predatory potential. The mite Brevipalpus phoenicis (Geijskes, 1939) (Acari: Tenuipalpidae) is a polyphagous pest and is the vector of the coffee ring spot virus in coffee plants. This work was made to evaluate the predatory capacity of C. externa larvae on B. phoenicis through bioassa...
Potential of Chrysoperla externa (Hagen) at B-biotype Bemisia tabaci (Gennadius...
Auad, Alexander Machado; Carvalho, César Freire; Souza, Brígida; Simões, Amanda Daniela; Oliveira, Simone Alves; Braga, André Luiz FurtadoThis study aimed to evaluate the potential of Chrysoperla externa (Hagen, 1861) in controlling nymphs of Bemisia tabaci (Gennadius, 1889), biotype B, in tomato plants. Ninety-six pots, each with one whiteflyfree plant, were placed in cages at greenhouse and each plant was infested with 100 adult whiteflies for 24 hours. In the first and eighth days after nymph eclosion, infested plants were inoculated with one,...