This paper is the first in a series of studies examining resistance of pear varieties to pear psylla.
Two pear accessions evaluated for susceptibility to pear psylla Cacopsylla bidens (Šulc) in Israel†
Article first published online: 4 JUL 2013
© 2013 Society of Chemical Industry
Pest Management Science
Volume 70, Issue 2, pages 234–239, February 2014
How to Cite
Shaltiel-Harpaz, L., Soroker, V., Kedoshim, R., Hason, R., Sokalsky, T., Hatib, K., Bar-Ya'akov, I. and Holland, D. (2014), Two pear accessions evaluated for susceptibility to pear psylla Cacopsylla bidens (Šulc) in Israel. Pest. Manag. Sci., 70: 234–239. doi: 10.1002/ps.3543
- Issue published online: 13 JAN 2014
- Article first published online: 4 JUL 2013
- Accepted manuscript online: 30 MAR 2013 11:39AM EST
- Manuscript Accepted: 30 MAR 2013
- Manuscript Revised: 12 MAR 2013
- Manuscript Received: 29 OCT 2012
- pear psylla;
- Cacopsylla bidens;
- resistant accessions;
The pear psylla, Cacopsylla bidens (Šulc), is one of the most damaging pests of commercial pear orchards in Israel. Psylla control is a major obstacle to efficient integrated pest management, necessitating research on cultivars with natural resistance to pear psylla. Recently, two pear accessions (Py.760-261 and Py.701-202) from the local Newe Ya'ar fruit tree live collection were identified as having apparent resistance to pear psylla. Our goal was to evaluate the resistance of these two accessions relative to the commercial cultivar Spadona Estiva, and to identify whether the resistance mechanisms in the former interfere with insect colonisation of the plant (antixenosis) or inhibit insect growth, development, reproduction and survival (antibiosis).
Settlement and development of C. bidens was evaluated under natural conditions (pear orchard), semi-natural conditions (potted plants), and on detached branches and leaves (laboratory). Our results indicate that the selection Py.760-261 is 10 times more resistant than Spadona while Py.701-202 is five times more resistant.
The resistance mechanism in both accessions appears to be antibiosis affecting nymph survival. These resistant accessions may be used as rootstock or as a source of resistant genes in breeding programmes. © 2013 Society of Chemical Industry