Armoured scale infestation of fruit of Hort16A kiwifruit

Blank, Robert H.; Gill, G. S. C.; Stannard, K.

doi:10.30843/nzpp.2000.53.3636

Cited by 2 publications

(3 citation statements)

References 2 publications

(4 reference statements)

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“…Previous observations of scale insects on the fruit of Hayward and Hort16A at Kerikeri and Te Puke have suggested that these cultivars differ in their susceptibility to the two main armoured scale insect species. Hayward fruit were infested by both species, while Hort16A fruit were infested mainly by greedy scale (Blank et al 2000). These observations may be explained by the poor settlement success of the latania scale on immature fruit (Fig.…”

Section: Discussionmentioning

confidence: 93%

“…2b). Hayward fruit, which are harvested in May but set approximately one month after Hort16A (Blank et al 2000), largely avoid settlement by scale crawlers from the fi rst generation (Fig. 2c).…”

Section: Scale Crawler Phenology In Relation To Scale Crawler Settlemmentioning

confidence: 99%

“…Preliminary observations suggest that there is variation in the susceptibility of Hayward and Hort16A to greedy and latania scale (Blank et al 2000). Furthermore, recent evaluation of Actinidia germplasm, held at the HortResearch Te Puke Research Orchard, has revealed considerable differences in the relative susceptibility of germplasm to armoured scale insects (Hill et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Settlement of armoured scale insects on fruit of commercial <i>Actinidia</i> spp

Mauchline¹,

Hill²

2005

NZPP

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The proportion of greedy (Hemiberlesia rapax) and latania (H lataniae) scale insect crawlers (Hemiptera Diaspididae) that settled on fruit of commercial kiwifruit cultivars Actinidia arguta cv K2D4 A chinensis cv Hort16A and A deliciosa cv Hayward was quantified at intervals from 20 to 100 final fruit size In all three cultivars the proportion of settled crawlers increased as the fruit matured The settlement of greedy scale was greater than latania on Hort16A fruit with minimal differences between scale species on other cultivars Comparisons of scale settlement with scale phenology found fruit of K2D4 was vulnerable to settlement from the first summer generation with secondgeneration scale mainly infesting Hayward fruit Hort16A fruit can be infested by both generations Implications of these findings for the pest status of scale insects and customisation of the industry pestmonitoring system (KiwiGreen) for new varieties are discussed

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Section: Discussionmentioning

confidence: 93%

Section: Scale Crawler Phenology In Relation To Scale Crawler Settlemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Settlement of armoured scale insects on fruit of commercial <i>Actinidia</i> spp

Mauchline¹,

Hill²

2005

NZPP

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Measuring resistance to armoured scale insects in kiwifruit (Actinidia) germplasm

Hill

Mauchline

Connolly

et al. 2010

New Zealand Journal of Crop and Horticultural Science

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A laboratory bioassay is described for measuring the resistance of kiwifruit vines to armoured scale insects (Hemiberlesia lataniae Signoret and Hemiberlesia rapax Comstock) using excised canes. The method measures the area of the scale cap using a template and compares relative cap sizes between genotypes. The method was tested for two species of kiwifruit (Actinidia deliciosa [A. Chev.] C.F. Liang et A.R. Ferguson and Actinidia chinensis Planch.) using a range of experimental genotypes and two commercial varieties. Large differences in the susceptibility of the genotypes to H. lataniae were observed, but much smaller differences were observed for H. rapax. The bioassay method was tested by comparing results obtained with observations of armoured scale insects on kiwifruit vines in the field. Sampling of simulated scale populations showed that differences in population mean scale cap areas of 0.3Á0.5 mm 2 could be detected with sample sizes of 50Á200. A bioassay of H. lataniae growth on an experimental genotype, comparing it with the commercial kiwifruit cultivars 'Hayward' and 'Hort16A' and using a template to categorize scale cap size into 0.2 mm 2 size categories, showed that the technique was quick, reliable and able to discriminate between kiwifruit varieties. This method could be easily adapted to test the susceptibility of germplasm from a variety of different horticultural plants to a wide range of armoured scale insect pests.

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Armoured scale infestation of fruit of Hort16A kiwifruit

Cited by 2 publications

References 2 publications

Settlement of armoured scale insects on fruit of commercial <i>Actinidia</i> spp

Settlement of armoured scale insects on fruit of commercial <i>Actinidia</i> spp

Measuring resistance to armoured scale insects in kiwifruit (Actinidia) germplasm

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