A COMPARISON OF LEPIDOPTERAN DAMAGE TO 'HORT16A' AND 'HAYWARD' KIWIFRUIT

摘要

The timing and incidence of lepidopteran damage to two kiwifruit cultivars, Hortl6A and Hayward, were compared by monitoring tagged fruit bunches on unsprayed vines over two seasons. In both seasons, the percentage of fruit with caterpillar damage increased rapidly during the 8 weeks immediately after fruit set. No new damage was found on Hort l6A fruit after this time, but Hayward fruit continued to be damaged from February until May. Only 7.4% (both seasons) of Hortl6A fruit incurred severe damage(non-export) compared with 11.7% (1997) or 18.4% (1998) of Hayward fruit. Damage to Hortl6A fruit was generally to the sepal area or side of fruit, whereas the side of fruit or stamen end were the most common feeding sites on Hayward. Ctenopseustis obliquana and Stathmopoda spp. caterpillars were the predominant species found on Hortl6A fruit, while C. obliquana and Cnephasia jactatana were the most common species found on Hayward fruit.