African Entomology (1997) 5, 319-336
T.L. Blomefield, K.L. Pringle and A. Sadie (1997)
Field observations on oviposition of colding moth, Cydia pomonella (Linnaeus) (Lepidoptera: Olethreutidae), in an unsprayed apple orchard in South Africa
African Entomology 5 (2), 319-336
Abstract: Oviposition of the codling moth, Cydia pomonella (Linnaeus), was studied from 1985 to 1989 in unsprayed apple orchards on the Elgin Experiment Farm, Grabouw, Western Cape Province. There was a significant difference in the site of oviposition, more eggs being recorded from the bottom half of the western and southern aspects of the tree. There was also contingency between the time o f year and level (upper half, lower half) in the tree. Moths of the first generation preferred the bottom half of the tree and second and third generation moths the top half of the tree. The preferred oviposition sites on Granny Smith (GS) and Golden Delicious (GD) cultivars, in order of preference, were leaves, fruit and wood. More eggs were laid on the fruit of GS spurs (35.6 %) than on those of GD spurs (10.7 %). On fruit spurs, there was a significant increase in the number of eggs on GD leaves, and GS fruit over the season, whereas the number of eggs on GS leaves and GD fruit remained constant. On branches, there was an increase in the number of eggs on GD and GS leaves, but not on the fruit or wood. The distribution within different fruit-bearing classes (1-4 fruit per spur) was random only for one fruit per spur, while on the other spur classes clustering occurred.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Ken L. Pringle, Thomas L. Blomefield
Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Cydia pomonella | Apple (Malus) | South Africa | ||
| Cydia pomonella | Apricot (Prunus armeniaca) | South Africa | ||
| Cydia pomonella | Pear (Pyrus) | South Africa |
