Cotton Bollworm
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Comparative bio-efficacy of nuclear polyhedrosis virus (NPV) and Spinosad against American bollwormm, Helicoverpa armigera (Hubner)
ABSTRACT American bollworm (ABW), Helicoverpa armigera (Hubner), is considered as a major pest of cotton, Gossypium hirsutum, all over the globe. Due to its destructive feeding nature and continuous consumption of the same chemicals, it devolved resistant against many insecticides. Therefore, a combined application of bio- and synthetic-pesticide need to eva
Rev. Bras. entomol.. Publicado em: 13/01/2020
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2. Histopathology of cotton bollworm midgut infected with Helicoverpa armigera cytoplasmic polyhedrosis virus
This research was carried out to examine cytopathological effects of Helicoverpa armigera Cytoplasmic polyhedrosis virus (HaCPV) on infected midgut cotton bollworm (Helicoverpa armigera) using transmission and scanning electron microscope. The symptoms on infected host larvae of the host, compared with healthy ones, were getting swollen with milky-white and
Braz. J. Microbiol.. Publicado em: 2013-12
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3. Oviposition and Feeding Preferences of the Bollworm on Cotton.
Oviposition and feeding preferences of the bollworm, Heliothis zea (Boddie) on cotton, Gossypium hirsutum L., cultivar ´Tamcot CAMD-E´. were studied. A highly significant number of eggs on termnal and leaves indicated clearly that bollworm moths exibit a high degree of preference for egg placement on these parts. Feeding sites for bollworm larvae were quit
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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4. Spatial Occurrence of the Bollworm Eggs, Larvae and Predators in Cotton.
Intraplant distribution of eggs, larvae and predators of the bollworm (Heliothis zea (Boddie) on cotton (Gossypium hirsutum L.) was studied in field trials during 1986 and 1987 in Oklahoma. The largest proportions of eggs were found and the main stem terminals and upper parts of the plant. The total bollworm eggs on terminal and total eggs on the whole plant
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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5. Larval Development and Survival of The Bollworm on Cotton.
Five larval instars of the bollworm, Heliothis zea Boddie were fed on five cotton plant parts and an artificial diet. Their effects on larval development and survival were analysed. The results showed that the highest mortality in first instar was for those placed on bolls. For the second and third instars, flowers, bolls, squares and leaves proportionated t
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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6. Vertical Distribution of Eggs and Larvae of the Bollworm Within the Cotton Plant.
The cotton cultivar ´Tamcot CAMD-E´, Gossypium hirsutum L., was planted in three different planting dates. Five wood-framed screen cages were used to cover 30 cotton plants during match-head squares and blooming phase for each planting date. Five female and five male bollworm moths, Heliothis zea, were released in each cage. The majority of eggs were laid
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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7. Inseticidas e intervalos de pulverizacao para o controle lagarta rosada (Pectinophora gossypiela (Saund) (Lepidoptera, gelechiidae) no algodoeiro herbaceo.
1982
Campina Grande: EMBRAPA-CNPA. Publicado em: 2011
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8. Resistência de variedades e tipos do algodoeiro arbóreo-Gossipium spp ao ataque da broca (Eutinobothrus brasiliensis, Hambleton 1937).
1982
Campina Grande: EMBRAPA-CNPA. Publicado em: 2011
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9. Pragas e doencas do algodoeiro na regiao de Guanambi, Bahia: recomendacoes e controle.
1983
Campina Grande: EMBRAPA-CNPA. Publicado em: 2011
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10. Insecticidal activity of venomous saliva from Rhynocoris fuscipes (Reduviidae) against Spodoptera litura and Helicoverpa armigera by microinjection and oral administration
Rhynocoris fuscipes is a potential predator of many economically important pests in India. In the present study, its venomous saliva (VS) was collected by milking and diluted with HPLC grade water to different concentrations (200, 400, 600, 800 and 1000 ppm). Microinjection of Rhynocoris fuscipes VS was more toxic than its oral administration in Helicoverpa
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2011
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11. Adaptabilidade de híbridos entre Gossypium barbadense E G. hirsutum N contendo o gene cry1Ac
Hybrids among transgenic plants and related species are expected to occur if they are sympatric and when there are not crossing barriers; as is the case, in Brazil, of cry1Ac transgenic cotton and Gossypium barbadense. This species has been maintained as dooryard plants, and should be preserved as a genetic resource. Hybrids were evaluated about traits relat
Publicado em: 2009
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12. Distribuição Espacial de Insetos em Algodoeiro Bt e não-Bt / Spatial Distribution of Alabama argillacea (Hübner) and Heliothis virescens (Fabricius) (Lepidoptera, Noctuidae) Eggs on Bt and Non-Bt Cotton
Among the several options for controlling Alabama argillacea (Hübner) and Heliothis virescens (Fabricius) larvae on the cotton crop, as insecticides spraying and biological control, the transgenic Bt-cotton has been inserted as an extremely viable alternative, however it is not known with accuracy as the transgenic plants affect the populations of organisms
Publicado em: 2008