Rainfastness and Residual Activity of Insecticides to Control Japanese Beetle (Coleoptera: Scarabaeidae) in Grapes

Hulbert, Daniel; Isaacs, Rufus; Vandervoort, Christine; Wise, John C.

doi:10.1603/ec11077

Cited by 26 publications

(22 citation statements)

References 34 publications

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“…In a previous experiment, the insecticides phosmet and carbaryl were tested on Japanese beetles under identical rainfall conditions, but on grape (Vitis labrusca L.) leaves (Hulbert et al 2011) and in this experiment we observed similar efÞcacy patterns. The differences observed between the two studies are likely because of differences between in the physical characteristics of grape and blueberry leaves.…”

Section: Discussionsupporting

confidence: 74%

“…Studying the efÞcacy of older and newer and reduced risk insecticides after rainfall could decrease unnecessary insecticide reapplication and the associated costs and risks. Hulbert et al (2011) showed that the insecticides bifenthrin, thiamethoxam, and indoxacarb were all resistant to 12.7 and 25.4 mm of rainfall against Japanese beetle adults when sprayed on grapes, while other insecticides (phosmet and carbaryl) had signiÞcantly diminished efÞcacies after rainfall. It is important for a grower to be able to determine whether an insecticide spray is warranted after rainfall.…”

mentioning

confidence: 99%

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Rainfastness of Insecticides Used to Control Japanese Beetle in Blueberries

et al. 2012

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Field-based bioassays were used to determine the relative impact of rainfall on the relative toxicity of four insecticides, phosmet, carbaryl, zeta-cypermethrin, or imidacloprid, from different chemical classes on adult Japanese beetles, Popillia japonica Newman, in highbush blueberries, Vaccinium corymbosum L. Bioassays were set up 24 h after spraying occurred and Japanese beetle condition was scored as alive, knockdown or immobile 1, 24, and 48 h after bioassay setup. All insecticides were significantly more toxic than the untreated control and zeta-cypermethrin consistently had the greatest toxic effect against the Japanese beetles. All insecticides experienced a decrease in efficacy after simulated rainfall onto treated blueberry shoots, although the efficacy of zeta-cypermethrin was the least affected by rainfall. This study will help blueberry growers make informed decisions on when reapplications of insecticides are needed in the field with the aim of improving integrated pest management (IPM).

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Section: Discussionsupporting

confidence: 74%

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confidence: 99%

Rainfastness of Insecticides Used to Control Japanese Beetle in Blueberries

et al. 2012

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“…Rainfall wash-off tests have been used in rain fastness and rainfall tenacity studies of several plant protection substances: foliar deposits of commercial formulations of diflubenzuron (Sundaram and Sundaram 1994), carbaryl (Willis et al 1996), chlorothalonil (Wauchope et al 2004), phosmet (Hulbert et al 2011), glyphosate commercial formulations (Gannon and Yelverton 2008), bio-herbicides (Boyette et al 2012), and fungicides such as dimethomorph, chlorothalonil, and mepanipyrim fungicides (Choi et al 2009). The influence of surfactants on the tenacity of tribenuron-methyl (Pannacci et al 2010), the sticker adjuvants based on organosilicone/latex added to fungicides (Gaskin and Steele 2009), and the effect of seed oil ethoxylate surfactants on the tenacity of the mancozeb (Hunsche et al 2008) were also studied using rainfall tests.…”

Section: Introductionmentioning

confidence: 99%

Modeling losses of copper-based fungicide foliar sprays in wash-off under simulated rain

Pérez‐Rodríguez

Paradelo

Gómez

et al. 2013

Int. J. Environ. Sci. Technol.

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Wash-off experiments of three Cu-based fungicides were conducted with a single raindrop simulator with known drop size and fall height. Losses were quantified as total Cu (Cu T ), in solution (Cu L ), and particulate (Cu P ). Cu wash-off time course was modeled for two different drop sizes using a stochastic model based on the cumulative detachment by random scattered raindrop impacts. In other set of experiments, the influence of raindrop size, fall height, and fungicide dose was analyzed statistically by means of a full factorial design. Most Cu was lost as particles sized from 0.3 to 1 lm. The stochastic model gave good estimations with two detachment performance levels. The best-fitting model parameters were as follows: the single element area covered by one impact (1.7 and 0.38 cm 2 for the large and small raindrop, respectively), the average number of repeated drop impacts on one single element area that exhaust non-rainfast fungicide (4.2 ± 3.0 small drops and 2.5 ± 0.5 large drops for the high performance level, low performance level needed 30 ± 10 large drops and 40 ± 88 small drops), and the mass washed-off by a single-drop impact (from 1.27 ± 0.2 lg Cu to 3 ± 1 ng Cu per impact). Factorial design showed the dosage was the most influential factor in the three fungicide formulations. The model can help to estimate fungicide losses in field from rainfall and canopy properties. However, the particulate/soluble loss ratio cannot be predicted by the model since both the particle detachment and solubilization were not clearly related with the raindrop energy.

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“…O conhecimento da infl uência das precipitações sobre a efi cácia dos inseticidas é de suma importância (HULBERT et al, 2011). Entretanto, os resultados do efeito da precipitação sobre a efi ciência do inseticida clorantraniliprole não podem Tabela 1 -Efeito do tempo de aplicação de precipitação artificial, em plantas de soja tratadas com o inseticida clorantraniliprole, sobre a mortalidade de lagartas de Anticarsia gemmatalis.…”

Section: Resultsunclassified