Estimating bird damage from damage incidence in wine grape vineyards
American Journal of Enology and Viticulture
By: R. W. DeHaven and R. L. Hothem
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Abstract
Bird damage was measured during 1977 and 1978 at 32 wine grape vineyards in the San Joaquin Valley and North Coastal Region of California. Both the percentage bird loss (PBL) and the percentage of bunches damaged (BDI = bird damage incidence) were determined during 55 total-damage assessments, and the resulting data pairs were used to develop a regression of PBL on BDI. The final prediction equation was loge (PBL + 1) = 0.0385 BDI, for which the SE = 9.6297 10-4, and it accounted for 97% of the observed variation. We conclude that by using that equation, reasonably accurate predictions of PBL can be obtained from relatively quick and inexpensive estimates of BDI. Guidelines for the use of the prediction method and the accuracy of some PBL predictions are discussed.
Suggested Citation
DeHaven, R.W., Hothem, R.L., 1981, Estimating bird damage from damage incidence in wine grape vineyards: American Journal of Enology and Viticulture, v. 32, no. 1, p. 1-4, https://doi.org/10.5344/ajev.1981.32.1.1.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Estimating bird damage from damage incidence in wine grape vineyards |
| Series title | American Journal of Enology and Viticulture |
| DOI | 10.5344/ajev.1981.32.1.1 |
| Volume | 32 |
| Issue | 1 |
| Publication Date | January 01, 1981 |
| Year Published | 1981 |
| Language | English |
| Publisher | American Society for Enology and Viticulture |
| Contributing office(s) | Western Ecological Research Center |
| Description | 4 p. |
| First page | 1 |
| Last page | 4 |