Preliminary investigations on the effects of spray concentration and target coverage on the effectiveness of treatment against Psylla pyri overpowering eggs.

Preliminary investigations on the effects of spray concentration and target coverage on the effectiveness of treatment against Psylla pyri overpowering eggs.

Falchieri; A. L. Ragazzi; A. Cesari
Dipartimento di Protezione e Valorizzazione Agroalimentare
Sezione di Fitoiatria
Università degli Studi di Bologna

Download “Indagini preliminari sugli effetti della concentrazione e della copertura dei bersagli sulla efficacia biologica dei trattamenti contro le uova invernali della Psilla del pero” pdf file in Italian.

Summary:

The effects of spray coverage (n° droplets/cm2) and pesticide concentration were assessed on efficiency against overpowering Psylla pyri eggs on collected pear buds.

The results showed that 366-418 droplets/cm2 (reduced volume application) gave better efficiency than run-off ones (high volumes application).
Higher concentrations permitted high biological activity in reduced coverage (<40% target surface) conditions.