Microbial Pesticide
Mostrando 1-12 de 25 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. Dynamical behavior of a pest management model with impulsive effect and nonlinear incidence rate
In this paper, we consider the pest management model with spraying microbial pesticide and releasing the infected pests, and the infected pests have the function similar to the microbial pesticide and can infect the healthy pests, further weaken or disable their prey function till death. By using the Floquet theory for impulsive differential equations, we sh
Computational & Applied Mathematics. Publicado em: 2011
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3. Effect of two dosages of Metarhizium anisopliae var. acridum against Rhammatocerus schistocercoides Rehn.
The fungs Metarhizizium anisopliae var. acridum, strain CG 423, was tested under fiel conditions against the gregarious grasshopper Rhannatocerus schistocercoides (Rehn) (Orthoptera: Acrididae). Conidia formulated in a rancemic mixture of soybean oil and kerosene were sprayed under field conditions using na ultralow-volume hand-held atomizer Ulva Plus adjust
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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4. Effect of two dosages of Metarhizium anisopliae var. acridum against Rhammatocerus schistocercoides Rehn.
The fungus Metarhizium anisopliae var. acridum, strain CG 423, was tested under field conditions against the gregarious grasshopper Rhammatocerus schistocercoides (Rehn) (Orthoptera: Acrididae). Conidia formulated in a racemic mixture of soybean oil and kerosene were sprayed under field conditions using an ultralow-volume hand-held atomizer Ulva Plus adjuste
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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5. Biofertilizer as tool to increase microbial diversity for management of plants diseases / Biofertilizante como ferramenta para incrementar a diversidade microbiana visando o manejo de doenças de plantas
In this study were compared the community of yeasts in the phylloplane of lily a conventional system with high pesticide use, with an without pesticide use, with the use of biofertilizers and biocontrol agents; to evaluate the antagonism of yeast Sporidiobolus pararoseus isolated from leaves of lily on Botrytis cinerea; determined the microbial epiphytic in
Publicado em: 2010
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6. Influência da qualidade de diferentes tipos de arroz e inibidores de proteinases no rendimento e na virulência de conídios do fungo entomopatogênico Metarhizium anisopliae (Mestch.) Sorokin (Ascomycota: Hypocreales) / Influence of quality of different types of rice and proteinase inhibitors on yield and virulence of conidia of the entomopathogenic fungus Metarhizium anisopliae (Mestch.) Sorokin (Ascomycota: Hypocreales)
In order to optimize the production process of Metarhizium anisopliae, the present study aimed to determine the effects of soybean proteinase inhibitors on growth, sporulation and virulence of the fungus and to compare yield, viability and virulence of M. anisopliae conidia produced in different types of rice and additives. The addition of 5 g.L-1 of semi-pu
Publicado em: 2010
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7. Effect of soybean oil in the endosulfan persistence in the environment. / Efeito de óleo de soja na persistência de endosulfan no ambiente.
The pesticides make part of a technology that is associated to the agriculture modernization. With their generalized use many problems occur and are diagnosed, among others, the water and soil contamination. The persistence in the environment is related to their physical and chemical properties, as well to the environment that defined the transport, retentio
Publicado em: 2005
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8. Biodegradation, sorption and desorption of 14C-diuron in two brazilian soils amended with sewage sludg. / Biodegradação, sorção e dessorção do herbicida 14C-Diuron em dois Latossolos tratados com lodo de esgoto.
Adding sludge to agricultural soil may modify the behavior of pesticides in the soil. In some cases, the application of organic amendment increases the degradation of pesticides, by providing nutrients and energy to the microorganisms able to degrade the molecule (Felsot &Dzantor, 1990), in other cases, the sorption is increased, resulting in the decrease of
Publicado em: 2005
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9. Efeitos provocados por agroquimicos livre ou ancorados em silica gel na microbiota do solo
The herbicides 2,4-D, diuron and picloram have been chemically immobilized onto silica gel surface producing new materiais named SiD, SiDi e SiPi, respectively. Immobilized amounts of the pesticides 2,4-D, diuron and picloram were 1.03; 0.79 and 1.11 mmol g, respectively. Free and immobilized herbicides have been applied in red Latossol soil and effects caus
Publicado em: 2001
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10. Stability and Effects of Some Pesticides in Soil1
The influence of 29 pesticides on CO2 production and nitrification by soil microorganisms was determined. A few compounds were stable but without significant effect in soil (chlorinated hydrocarbons), some persisted and depressed respiration and nitrification (carbamates, cyclodienes, phenylureas, thiolcarbamates), and others displayed toxicity but were tran
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11. Microbial Metabolism of a Parathion-Xylene Pesticide Formulation
A mixed bacterial culture was adapted to growth on a mixed carbon substrate consisting of the pesticide parathion and its xylene-based formulation. The environmental growth parameters of temperature, pH, and dissolved oxygen concentration were optimized to obtain complete metabolism of parathion from this mixed carbon substrate. This adapted culture grew rap
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12. Metabolism of fensulfothion by a soil bacterium, Pseudomonas alcaligenes C1.
Fensulfothion (O,O-diethyl O-[4-(methylsulfinyl)phenyl]phosphorothioate), an organophosphorus pesticide used to control the golden nematode Heterodera rostochiensis, is used as a source of carbon by microorganisms isolated from soils treated with the pesticide. Two of the microbial isolates, Pseudomonas alcaligenes C1 and Alcaligenes sp. strain NC3, used mor