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Effect of neem seed oil aqueous solutions on survival and development of the predator Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae) Neotropical Entomology
Silva,Flávia A.C. da; Martinez,Sueli S..
The effects of the neem seed oil aqueous solutions on survival and performance of egg, larva and adult stage of the Coccinelid predator Cycloneda sanguinea (L.) were evaluated under laboratory conditions. In a first trial, eggs and 2nd-instar larvae were sprayed with the neem solutions at 0; 0.5 and 2.25 ml/l and kept at 25 ± 1ºC, 70% RH and 14h photoperiod. Egg viability and duration and larvae and pupae survival were evaluated as well as the predatory capacity of the larvae, adult longevity and reproduction. Egg spraying did not affect egg hatch or larvae survival and development. When the larvae were sprayed, significant mortality was observed only at the higher concentration (P < 0.05) and larval development and predatory capacity were not affected....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Meliaceae; Biological control; Botanical insecticide; Predator; Ladybird; Parthenium.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000600013
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Growth disruption, abnormalities and mortality of Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) caused by Azadirachtin Neotropical Entomology
Martinez,Sueli S.; van Emden,Helmut F..
Azadirachtin is the most effective compound of the neem tree, Azadirachta indica A. Juss, with insecticidal and growth disruption properties on several species of insects. Its effects on the development and survival of Spodoptora littoralis (Boisduval) were studied under laboratory conditions. Third-instar larvae were individually fed on artificial diet treated with azadirachtin (from 0.01 ppm to 1 ppm wt/v), for two days, and transferred to plain diet. Survival, duration of stages and deformities were recorded daily. In a second experiment, the effects of azadirachtin on 3rd instar larvae and on last instar larvae were compared, by feeding the larvae with treated diet (0.3 ppm, 0.6 ppm and a control group), during the same period. A two-day feeding period...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Neem; Azadirachta indica; Botanical insecticide; Larva-pupa intermediate.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000100017
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Compatibility of the fungus Beauveria Bassiana (Bals.) Vuill. (Deuteromycetes) with extracts of neem seeds and leaves and the emulsible oil Neotropical Entomology
Depieri,Rogério A.; Martinez,Sueli S.; Menezes Jr.,Ayres O..
The compatibility of a commercial formula of emulsible neem oil (Azadirachta indica A. Juss.) and of aqueous extracts of neem seeds and leaves with Beauveria bassiana (Bals.) Vuill. was evaluated in vitro. Three experiments were conducted to evaluate the effect of each product on the fungus vegetative growth and on conidia production and viability. The products were incorporated to a culture medium (BDA+E) and distributed into petri dishes, in the following concentrations: 0.15%; 1.5% and 15% (leaf aqueous extract), 1%; 2% and 4% (seed aqueous extract) and 0.5%; 1% and 1.5% (emulsible oil). Vegetative growth and conidia production were the basis for characterization of the aqueous extracts of seeds and leaves and of the emulsible oil, using the T...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Azadirachta indica; Selectivity; Biological control; Entomopathogenic fungus.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400010
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Identification, geographical distribution and host plants of Bemisia tabaci (Genn.) biotypes (Homoptera: Aleyrodidae) in the State of Paraná, Brazil Anais da SEB
Martinez,Sueli S.; Carvalho,Alfredo O. R. de; Vieira,Luiz G.; Nunes,Liliane M.; Bianchini,Anésio.
This work was carried out in order to identify Bemisia tabaci (Genn.) biotypes present in the state of Paraná and to determine their geographical distribution and host plants. About 50 adults were collected in several host crops, weeds and ornamental plants in North, Northwest, Northeast, West and Central areas of the state, from January to May, 1998 and 1999. The species were identified by means of RAPD-PCR, using the primer Operon H-16. Whitefly populations were detected mainly from February on, in both years, seldom achieving more than one adult per leaf. The insect was found in only 66% of the sampled areas. Bean golden mosaic was almost never observed during the period. Both biotype A and biotype B of B. tabaci were found in the State of Paraná, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Silverleaf whitefly; Sweetpotato whitefly; RAPD; DNA variability.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80592000000300023
Registros recuperados: 4
Primeira ... 1 ... Última
 

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