Mass production and utilization of trichogramma 10. control of the codling moth cydia pomonella and the summer fruit tortrix moth adoxophyes orana lepidoptera tortricidae

Hassan, S.A.; Kohler, E.; Rost, W.M.

Entomophaga 33(4): 413-420

1988


ISSN/ISBN: 0013-8959
Accession: 007534577

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Abstract
The effectiveness of Trichogramma dendrolimi, Trichigramma embryophagum, Trichogramma sp. strain 45 and Trichogramma sp. strain 48 to control the codling moth Cydia pomonella L. and the summer fruit tortrix moth Adoxophyes orana F.R. was tested in 4 field trials (1984-1986). Four to six Trichogramma treatments (depending on the temperature) each at 400 (pillar trees) to 9,000 (round tops) parasites per tree were carried out between June and August to insure the continuous presence of Trichogramma in the plots. The monitoring was done by examining 3,000 to 10,000 apple fruits per plot. T. dendorlimi reduced the damage of C. pomonella by 61.35%, of A. orana by 72.85%. T. embryophagum reduced the damage of C. pomonella by 50.06%, of A. orana by 50.8%. Trichogramma strain 45 reduced the damage of C. pomonella by 41.6% and of A. orana by 87.9%, Trichogramma strain 48 by 57.2% and 51.2% respectively. The reduction of 67.1% in the number of apple fruits damaged by C. pomonella and A. orana obtained by the inudative releases of T. dendrolimi in these experiments is considered economically and the use of this species in practice is recommended.