Seasonal Dynamics of Spissistilus festinus (Hemiptera: Membracidae) in a Californian Vineyard

Journal of Economic Entomology
Cindy R PretoFrank G Zalom

Abstract

The three-cornered alfalfa hopper, Spissistilus festinus (Say) was shown to transmit Grapevine red blotch virus (GRBV) in a greenhouse study. GRBV is the causal agent of Grapevine Red Blotch Disease, which reduces the quality of wine produced from infected grapes. Due to the general lack of prior concern regarding S. festinus on grapevines, the biology of this species in vineyards has been largely unknown. A 2-yr study with weekly sampling was conducted in a Californian vineyard to increase the knowledge of S. festinus seasonal dynamics and distribution. The overwintering S. festinus adults were first captured in the vineyard before bud break. Detection of late-instar S. festinus nymphs, the first in-field adult generation, and grape anthesis occurred concurrently in 2016 and 2017. Two in-field S. festinus generations were documented by peaks in sweep net sampling of vineyard groundcover in 2016, whereas only one generation was observed in 2017. There appears to be an inverse relationship between the number of S. festinus adults sampled on ground cover and the number of girdles in the grapevine canopy. Spissistilus festinus exhibited an aggregated distribution in the vineyard and a significant edge effect. Results from this stu...Continue Reading

References

May 10, 2013·Phytopathology·Maher Al RwahnihMysore R Sudarshana
Feb 19, 2017·Archives of Virology·Arvind VarsaniDarren P Martin
Sep 26, 2017·Phytopathology·Elizabeth J CieniewiczMarc Fuchs
Feb 14, 2018·Phytopathology·Luz Marcela YepesMarc Fuchs
Aug 11, 2018·European Journal of Surgical Oncology : the Journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology·Catherine HubertChristine Sempoux

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