Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Communication on the preventive control of Thaumetopoea pityocampa Schiff. (Lep., Thaumetopoeidae) in Thessaloniki, Greece.

Abstract

Field trials were carried out in Thessaloniki, northern Greece, in 1980-81 to examine the possibility of preventive measures against Thaumetopoea pityocampa (Denis & Schiff.) on pine (Pinus). Bacillus thuringiensis subsp. thuringiensis (Bactospeine), B. thuringiensis subsp. kurstaki (Dipel), diflubenzuron (Dimilin) and triflumuron (SIR-8514) were applied to P. brutia before the beginning of egg hatch. Bactospeine and diflubenzuron caused a reduction in the hatch rate when spraying was carried out 22-23 days before hatching. Up to 30 days after application, a high level of larval mortality was observed (70-100%). The mortality rate was lowest (21%) after application of the lowest dosage of Dipel (75 ml/100 litres water). However, none of the preparations was completely effective against larvae placed on the trees 80 days after treatment, although they caused a reduction in larval weight.