Passionvine hopper, Scolypopa australis (Walker) (Hemiptera: Ricaniidae), (PVH) is an introduced pest of kiwifruit grown in New Zealand. Two aphelinid egg parasitoids, Centrodora scolypopae Valentine and Ablerus sp., are thought to be its most important natural enemies. Rates of egg parasitism measured during 2010–2015 in the Bay of Plenty region and in a wider survey of the North Island of New Zealand in 2015 were ≤ 10% compared with medians of about 30–50% for historical estimates. PVH eggs laid in bracken, a favored host plant, in 2015 and 2019 were parasitized at about half the rate or less than indicated by measurements made 20, 35–38 and 57 years ago. The apparent decline may have been the result of asynchrony between one or both egg parasitoids and PVH associated with warmer summer and autumn temperatures. Further work is needed to clarify the role of each parasitoid in PVH population dynamics.

中文翻译：

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西番莲漏卵（Scolypopa australis）的寄生率长期下降

百香果漏斗，澳洲新斯科拉（Walker）（半翅目：Ricaniidae）（PVH）是新西兰种植的一种奇异果的引进害虫。两种类蛋黄的卵寄生虫，Centodora scolypopae Valentine和Ablerussp。，被认为是其最重要的天敌。在2010-2015年期间，在丰盛湾地区和2015年对新西兰北岛的更广泛调查中测得的卵寄生率≤10％，而历史估计值的中位数约为30-50％。2015年和2019年，将蕨类（最喜欢的寄主植物）中产下的PVH卵寄生化的比率约为20，35-38和57年前的一半或以下。明显的下降可能是由于卵子寄生虫或PVH与夏季和秋季温度升高相关的不同步所致。需要进一步的工作来阐明每种寄生虫在PVH种群动态中的作用。