Monitoring and control of pear slug (sawfly) in an organic nashi orchard

Van_Epenhuijsen, C.W.; Silva, H.N. de

doi:10.30843/nzpp.1991.44.10809

Cited by 3 publications

(1 citation statement)

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“…Cocoons over-winter in the soil, and the adults, which are mostly female, emerge in the spring and oviposit on the leaves. In most parts of New Zealand, a second, most damaging generation occurs later in the summer (Epenhuijsen & de Silva 1991). Severe damage from larvae in late summer can affect subsequent bud set (Penman 1976).…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of seedlingPyrusclones to pear sawfly (Caliroa cerasi) (Hymenoptera: Tenthredinidae) damage

Shaw

Brewer

Wallis

et al. 2003

New Zealand Journal of Crop and Horticultural Science

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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.

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Section: Introductionmentioning

confidence: 99%