Journal of Economic Entomology (1995) 88, 973-978

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E.H. Beers, E.A. Elsner and S.R. Drake (1995)
White apple leafhopper (Homoptera: Cicadellidae) effect on fruit size, quality, and return bloom of apple
Journal of Economic Entomology 88 (4), 973-978
Abstract: Studies were conducted during 1987 and 1988 on the effect of single season injury by white apple leafhopper, Typhlocyba pomaria McAtee, to the 'Oregon Spur Delicious' apple. In 1987, the internal fruit flesh color (yellow) was increased, indicating that fruit from leafhopper-injured trees was slightly more mature than fruit from uninjured trees. In 1988, external fruit skin color was slightly redder (Hunter a) in fruit from injured trees, but titratable acidity was slightly lower. No effect on fruit weight, fruit firmness, soluble solids, percentage red skin color, return bloom, or return crop as a result of leafhopper injury relatively in either year, despite high leafhopper populations (~6.5 nymphs per leaf) and relatively high foliar injury. Current action thresholds for white apple leafhopper are likely too conservative, and the potential for biological control can be explored without economic loss to the producer.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Elizabeth H. Beers

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

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Typhlocyba pomaria Apple (Malus) U.S.A. (NE)