Efficacy of Insecticides Against Foliar Form of Grape Phylloxera, 2008

Johnson, Donald M.; Lewis, Barbara; Sleezer, Sandra

doi:10.4182/amt.2009.c14

Cited by 3 publications

(2 citation statements)

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“…Note: Dates were estimated from accumulated degree days since October 1 st of each year. 1 Thermal constant and 2 Lower threshold temperature determined by Johnson et al 2010.…”

Section: Resultsmentioning

confidence: 94%

“…To predict pest population development, degree day (DD) accumulation from October 1 st (biofix) was estimated using 6.4°C as a lower threshold temperature (LTT) and 303 DD as a thermal constant (K) to complete a generation (Johnson et al 2010, Sleezer et al 2011). Degree days were estimated using the Baskerville and Emin (1969) method based on maximum and minimum air temperatures.…”

Section: Methodsmentioning

confidence: 99%

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Life history and assessment of grapevine phylloxera leaf galling incidence on Vitis species in Uruguay

et al. 2013

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Grapevine phylloxera, Daktulosphaira vitifoliae (Fitch) (Hemiptera: Phylloxeridae) is a worldwide pest of Vitis species. It has forms that feed on leaves and roots. Root forms predominate on Vitis vinifera (L.) cultivars, while leaf forms predominate on Vitis species from its native American range. Recently, high densities of D. vitifoliae infestations in leaves of V. vinifera in Brazil, Peru, and Uruguay have been reported. The aims of this study were to determine the seasonal development of grape phylloxera, quantify infestation levels on V. vinifera leaves, and compare them with infestation levels on leaves of a rootstock of American origin. Studies were conducted in two vineyards in Uruguay from 2004–2007. Terminal shoots of 3309 C and Cabernet Sauvignon, Chardonnay, Tannat, Viognier, grafted onto resistant rootstock, were sampled weekly and leaves examined for gall presence and insect life stage. First galls were detected in early October; eggs began to appear within two weeks. Two oviposition peaks occurred by the end of December, and they coincided with bursts of shoot growth. On 3309C rootstock, oviposition peaks were more frequent than on the European cultivars. Based on thermal accumulation, D. vitifoliae could complete eight generations a year in Uruguay. Rootstock 3309C suffered the greatest damage but in some cases was similar to the European cultivars. Damage to Chardonnay, Cabernet Sauvignon and Viognier were also high. There were no galls on Tannat. The 2005–2006 season was characterized by low infestation rates caused by a prolonged drought that affected vegetative growth. There were also differences between vineyards, where the vigorous plants suffering more damage. Leaf galling phylloxera incidence and damage were mainly associated to the cultivar but plant vigor and environmental factors also contributed to increase the incidence.

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“…Note: Dates were estimated from accumulated degree days since October 1 st of each year. 1 Thermal constant and 2 Lower threshold temperature determined by Johnson et al 2010.…”

Section: Resultsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Life history and assessment of grapevine phylloxera leaf galling incidence on Vitis species in Uruguay

et al. 2013

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Grape Phylloxera (Hemiptera: Phylloxeridae), on Cold-Hardy Hybrid Wine Grapes (Vitis spp.): A Review of Pest Biology, Damage, and Management Practices

Clark

Burkness

et al. 2019

Journal of Integrated Pest Management

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Effects of Foliar Phylloxera (Hemiptera: Phylloxeridae) Infestations on Wine Grape Photosynthesis, Yield, and Fruit Quality

Burkness

Hutchison

et al. 2021

Journal of Entomological Science

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Grape phylloxera, Daktulosphaira vitifoliae Fitch (Hemiptera: Phylloxeridae), is an important pest that forms galls on the foliage and roots of Vitis species. The effects of grape phylloxera on grape root have been studied extensively. This study investigated the effects of the foliar form of grape phylloxera, which is a persistent pest of North American native Vitis species and cold-hardy hybrid wine grapes between Vitis vinifera L. and Vitis riparia Michx. For a susceptible variety, ‘Frontenac’, in commercial Minnesota vineyards, there were reductions in cluster weight due to foliar phylloxera infestations in 2017 (one site; P = 0.05) and 2018 (three sites; nonsignificant). Reductions in cluster weight can be economically important to growers. For four grape varieties (susceptible and resistant) evaluated in the greenhouse, there were numerical reductions in photosynthetic rate and localized photosystem II efficiency in 1 of 2 yr. Resistant varieties had less of a reduction on conductance due to grape phylloxera infestation than susceptible varieties in 1 of 2 yr. The degree to which this occurs in resistant varieties may be related to the formation of fewer adaxial stomata; however, this hypothesis requires additional research. These results add important information to better understand how foliar phylloxera injury affects wine grape photosynthesis and yield. The results serve as a foundation for investigating variety-specific responses to foliar phylloxera through the use of advanced phenotyping technologies. This knowledge will lead to a better understanding of the effect of the pest on the diversity of cold-hardy grape varieties grown in the Midwestern United States.

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Efficacy of Insecticides Against Foliar Form of Grape Phylloxera, 2008

Cited by 3 publications

References 0 publications

Life history and assessment of grapevine phylloxera leaf galling incidence on Vitis species in Uruguay

Life history and assessment of grapevine phylloxera leaf galling incidence on Vitis species in Uruguay

Grape Phylloxera (Hemiptera: Phylloxeridae), on Cold-Hardy Hybrid Wine Grapes (Vitis spp.): A Review of Pest Biology, Damage, and Management Practices

Effects of Foliar Phylloxera (Hemiptera: Phylloxeridae) Infestations on Wine Grape Photosynthesis, Yield, and Fruit Quality

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