Susceptibility of seedling Pyrus clones to pear sawfly (Caliroa cerasi) (Hymenoptera: Tenthredinidae) damage

Pear slugs, the larvae of the sawfly Caliroa cerasi, can cause extensive damage to pear leaves in organic or reduced-spray orchards. Breeding for resistance provides a strategy for the long-term control of this pest. Twenty-two accessions from the Horticulture and Food Research Institute of New Zeal...

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Published inNew Zealand journal of crop and horticultural science Vol. 31; no. 1; pp. 9 - 14
Main Authors Shaw, P. W., Brewer, L. R., Wallis, D. R., Bus, V. G. M., Alspach, P. A.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.03.2003
Subjects
Caliroa cerasi
organic growing
oviposition
pear slug
plant damage
plant resistance
Pyrus calleryana
Tenthredinidae
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Summary:Pear slugs, the larvae of the sawfly Caliroa cerasi, can cause extensive damage to pear leaves in organic or reduced-spray orchards. Breeding for resistance provides a strategy for the long-term control of this pest. Twenty-two accessions from the Horticulture and Food Research Institute of New Zealand pear breeding programme were selected to cover a range of field-assessed susceptibility to this pest. These were grafted onto Pyrus calleryana seedling rootstock, and the young plants were arranged in a blocked trial design in a ventilated glasshouse. The plants were covered with insect-proof netting, into which adult sawfly were released. The number of eggs per plant did not differ among the susceptibility classes, but the level of damage was related to the predicted level of susceptibility. This study confirmed the existence of variation in the resistance of pear genotypes to pear slug damage.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0114-0671
1175-8783
DOI:10.1080/01140671.2003.9514230