Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (1998) 122, 361-368

F. Pavan, V. Girolami and G. Sacilotto (1998)
Second generation of grape berry moths, Lobesia botrana (Den. and Schiff.) (Lep., Tortricidae) and Eupoecilia ambiguella (Hb.) (Lep., Cochylidae): spatial and frequency distributions of larvae, weight loss and economic injury level
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie 122 (7), 361-368
Abstract: Spatial and frequency distributions of grape berry moth larvae were studied in vineyards of northeastern Italy. The larval density varied in relation to position of^-grape clusters within vines. For density values below 0.5 larval nests per cluster, the larvae were almost randomly distributed and fit the Poisson distribution, while above 0.5 larval nests per cluster were slightly aggregated and fit the negative binomial distribution better. A new method to estimate cluster weight loss cause by second generation of grape berry moths, based on weighing and, counting of berries injured, was proposed. Therefore an estimate of economic injury level based on this method was put forward.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Francesco Pavan

Research topic(s) for pests/diseases/weeds:
thresholds/decision-support systems
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lobesia botrana	Grapevine (Vitis)	Italy
	Eupoecilia ambiguella	Grapevine (Vitis)	Italy