บทคัดย่องานวิจัย

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Factors affecting the presence of Typhlodromus spp. (Acarina: Phytoseiidae) in the calyx cavities of apple fruits and implications for integrated pest management.

Gurr, G. M.; Thwaite, W. G.; Valentine, B. J.; Nicol, H. I.;

Experimental & Applied Acarology Year: 1997 Vol: 21 Issue: 6/7 Pages: 357-364 Ref: 21 ref.

1997

บทคัดย่อ

Factors affecting the presence of Typhlodromus spp. (Acarina: Phytoseiidae) in the calyx cavities of apple fruits and implications for integrated pest management.

The postharvest presence of the motiles of Typhlodromus occidentalis and T. pyri was studied in the calyx cavities of apple fruits of three cultivars in New South Wales during 1992-95. The mean numbers of motiles per fruit were as high as 6.10. The phytoseiid densities were lowest in cv. Bonza and tended to be greater in samples taken in late autumn, particularly in cv. Red Delicious. No significant effect was observed for treatments with azinphos-methyl (Gusathion), fenoxycarb (Insegar) and tebufenozide (Mimic). Phytoseiids remained present within fruits of cv. Granny Smith left on the orchard floor in winter. Together with an observed reduction in the numbers of T. occidentalis in the early spring, this suggests that fruits constitute an overwintering refuge.