Pesticide Properties in the Environment

Hornsby, Arthur G.; Wauchope, R. D.; Herner, Albert E.

doi:10.1007/978-1-4612-2316-0

Cited by 284 publications

(264 citation statements)

References 51 publications

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“…Leite et al (1998) verificaram que a abamectina foi medianamente seletiva em favor do primeiro desses Vespidae. A seletividade da abamectina [mistura das avermectina B1a (80%) e B1b (20%)] pode ser decorrente do seu alto peso molecular (873,1 e 859,08) e estrutura molecular complexa, que diminui a taxa de penetração na cutícula e a torna mais suscetível à ação de enzimas desintoxificativas, respectivamente (Hornsby et al, 1996).…”

Section: Resultsunclassified

“…Os resultados obtidos com os organofosforados fenitrotiom, paratiom metílico e triclorfom, que não foram seletivos em favor das vespas predadoras, concordam com os verificados por Gonring et al (1999), que sugerem estar as altas toxicidades desses inseticidas aos predadores relacionadas com seus baixos pesos moleculares (277,2, 263,21 e 257,44, respectivamente) (Hornsby et al, 1996). Quanto menor o peso molecular, maior a taxa de penetração desses inseticidas na cutícula dos insetos.…”

Section: Resultsunclassified

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Seletividade de oito inseticidas a predadores de lagartas em citros

Galvan

Picanço

Bacci

et al. 2002

Pesq. agropec. bras.

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Resumo O objetivo deste trabalho foi avaliar a seletividade dos inseticidas abamectina, acefato, carbaril, deltametrina, fenitrotiom, fenpropatrina, paratiom metílico e triclorfom aos predadores Brachygastra lecheguana (Latreille), Protonectarina sylveirae (Saussure) e Protopolybia exigua (Saussure) (Hymenoptera: Vespidae) em concentrações que corresponderam a 50% e 100% da dose recomendada para o controle de lagartas em citros. Os inseticidas estudados não foram seletivos em favor do predador P. sylveirae. Fenitrotiom, fenpropatrina, paratiom metílico e triclorfom não foram seletivos em favor dos predadores B. lecheguana e P. exigua. Abamectina, acefato e carbaril foram medianamente seletivos em favor de P. exigua, o mesmo foi verificado com abamectina e carbaril em favor de B. lecheguana. Acefato foi seletivo em favor de B. lecheguana e deltametrina em favor de P. exigua. As altas mortalidades causadas por deltametrina a P. sylveirae, triclorfom a B. lecheguana e acefato a P. exigua decresceram quando aplicados em subdose. B. lecheguana foi o predador mais tolerante à dose de acefato, seguido por P. exigua e P. sylveirae. O predador P. exigua foi mais tolerante à dose de deltametrina que B. lecheguana e P. sylveirae. As três espécies de predadores foram altamente suscetí-veis às doses e subdoses de fenitrotiom, fenpropatrina e paratiom metílico, e à dose de triclorfom.Termos para indexação: Brachygastra lecheguana, Protonectarina sylveirae, Protopolybia exigua, controle de insetos, controle biológico. Selectivity of eight insecticides to predators of citrus caterpillarsAbstract The selectivity of abamectin, acephate, carbaryl, deltamethrin, fenitrothion, fenpropathrin, methyl parathion and trichlorfon to the predators Brachygastra lecheguana (Latreille), Protonectarina sylveirae (Saussure) and Protopolybia exigua (Saussure) (Hymenoptera: Vespidae) was evaluated using insecticide concentrations corresponding to 50% and 100% of the current recommended rate for citrus caterpillars. The insecticides studied were not selective in favor of the predator P. sylveirae. Fenitrothion, fenpropathrin, methyl parathion and trichlorfon were not selective in favor of the predator B. lecheguana and P. exigua. Abamectin, acephate and carbaryl showed median selectivity in favor of P. exigua, and the same was observed with abamectin and carbaryl in favor of B. lecheguana. Acephate was selective in favor of B. lecheguana and deltamethrin in favor of P. exigua. The high mortalities caused by deltamethrin in P. sylveirae, trichlorfon in B. lecheguana and acephate in P. exigua decreased when the lower concentration was used. B. lecheguana was the most tolerant predator to the higher acephate concentration, followed by P. exigua and P. sylveirae. P. exigua was more tolerant to the higher deltamethrin concentration than B. lecheguana and P. sylveirae. The three predator species were highly susceptible to both concentrations of fenitrothion, fenpropathrin and methyl parathion, and the higher concentration of trichlorfon.

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Section: Resultsunclassified

Seletividade de oito inseticidas a predadores de lagartas em citros

Galvan

Picanço

Bacci

et al. 2002

Pesq. agropec. bras.

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“…Previous research provided the herbicide half-life time values and the soil sorption coefficients (HORNSBY et al, 1995). This experiment uses the half-life time to estimate the degradation rate, k S values, through the expression k S = 0.693/t 1/2 , where t 1/2 (day) is the soil herbicide half-life (HORNSBY et al, 1995).…”

Section: Methodsmentioning

confidence: 99%

Estimation of herbicide bioconcentration in sugarcane (Saccharum officinarum L.)

et al. 2015

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“…Some of the main herbicides registered in Brazil for sugarcane cropping are listed in Table 1, as well as the information on their recommended dose (kg ha -1 ), area of application (ha), toxicity (mg L -1 ) on algae, daphnids and fish data (EC50 values) were gathered from US-EPA Pesticide Ecotoxicity Database (www. ipmcenters.org/Ecotox/DataAccess.cfm), soil organic carbon partition coefficient (L kg -1 ), and half-life (day) in soil (data were gathered from Hornsby et al, 1996). For the calculus of the retardation and attenuation factors (Eqs.…”

Section: Numerical Simulation: Input Datamentioning

confidence: 99%

“…To find an estimate of area for each herbicide we adopted the same percentage of area per herbicide found by Armas et al (2005) and we extrapolated the data for all Brazilian area (Table 1). Hornsby et al (1996).…”

Section: Numerical Simulation: Input Datamentioning

confidence: 99%

A mathematical model to estimate the volume of grey water of pesticide mixtures

Paraíba

Pazianotto

Luiz

et al. 2014

Span. j. agric. res.

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The usual method to calculate grey water footprint does not take into account the volume of water required to dilute concentrations of pesticide mixtures in freshwater and it also depends on maximum concentration limit acceptable in water. We propose a model to estimate the grey water footprint of crops by calculating the volume of water necessary to dilute pesticide mixtures reaching freshwaters. The model requires short-term toxicity data from aquatic organisms based on EC50 values, soil pesticide half-life and soil sorption coefficient values, and does not require maximum concentration limit acceptable in water. The lixiviation rate and runoff rate of each pesticide was estimated by attenuation factor and by Soilfug model, respectively. The usefulness of the proposed model was illustrated by estimating the volume of grey water required to dilute the 17 most widely used herbicides in sugarcane crops of Brazil. The grey water footprint corresponding to the recommended agronomic dose for each herbicide varied between 4.20×106 m3 yr-1 and 1.20×1012 m3 yr-1 and the grey water footprint of the mixture of herbicides was 2.36×1012 m3 yr-1 in a cultivated area of 8.4×106 ha. These results establish the ranking position of each herbicide in the composition of the grey water footprint of mixture of herbicides. The rank of each herbicide could be used to create a label to be placed on the package of the pesticide, thus informing farmers about the volume of grey water per hectare due to the use of this herbicide.

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Pesticide Properties in the Environment

Cited by 284 publications

References 51 publications

Seletividade de oito inseticidas a predadores de lagartas em citros

Seletividade de oito inseticidas a predadores de lagartas em citros

Estimation of herbicide bioconcentration in sugarcane (Saccharum officinarum L.)

A mathematical model to estimate the volume of grey water of pesticide mixtures

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