Bulletin of Insectology (2020) 73, 53-58

Dietmar Götsch, Gudrun Strauss and Sylvia Blümel (2020)
Laboratory trials to reduce egg hatching of the American grapevine leafhopper (Scaphoideus titanus) with selected insecticides
Bulletin of Insectology 73 (1), 53-58
Abstract: Laboratory trials were carried out under controlled conditions (24 °C, 75% RH, 16L:8D) to evaluate the effect of six selected insecticides on egg hatching of Scaphoideus titanus Ball (Hemiptera Cicadellidae). Standardized cuttings of two-year-old Isabella (Vitis vinifera × Vitis labrusca) canes were used as test plant material. A newly developed test cage allowed the treatment of infested canes in a vertical position and a standardized assessment of the number of S. titanus nymphs on yellow sticky traps over the whole hatching period. The six test substances etofenprox, spirotetramat, paraffin oil, azadirachtin, spirodiclofen and aluminium silicate (kaolinite) resulted in a reduction of egg hatching of S. titanus of 100%, 99%, 83%, 72%, 64% and 47% in relation to the control (water) respectively. The present study suggests that plant protection treatments against the immobile stage of S. titanus at an earlier application date (BBCH-scale 13-17) than the usually recommended one in Austria (BBCH 65-77) could effectively reduce S. titanus population at the start of the growing season and lead to an improved suppression of the vector-assisted spread of Flavescence dorée phytoplasma.
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Database assignments for author(s): Gudrun Strauss

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Scaphoideus titanus	Grapevine (Vitis)	Austria