2017
DOI: 10.1111/afe.12214
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Is there reproductive diapause in the winterform of pear psylla Cacopsyla bidens?

Abstract: Seasonal changes in reproductive state were investigated in the pear psylla Cacopsylla bidens (Šulc), with a particular emphasis on the evaluation of reproductive diapause during autumn and winter. Changes in reproductive status were observed in both seasons in populations living at four altitudes: 70, 300, 700 and 730 m. Winterform psylla females exhibited a period of slow ovarian development and a low mating rate. The onset, duration and extent of this period varied among the four sites but terminated synchr… Show more

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Cited by 4 publications
(10 citation statements)
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“…The difference in predation capabilities was highly due to the morphological and biochemical variations between two morphotypes. First, our results indicated that winterforms weighed more than summerforms, the body weight difference can be explained by larger body sizes, which is often the case for pear psyllids [26–27,68]. The size of prey insects is an important factor influencing the foraging behavior of their natural enemies, including encounter rate and prey-handling ability [69].…”
Section: Discussionmentioning
confidence: 98%
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“…The difference in predation capabilities was highly due to the morphological and biochemical variations between two morphotypes. First, our results indicated that winterforms weighed more than summerforms, the body weight difference can be explained by larger body sizes, which is often the case for pear psyllids [26–27,68]. The size of prey insects is an important factor influencing the foraging behavior of their natural enemies, including encounter rate and prey-handling ability [69].…”
Section: Discussionmentioning
confidence: 98%
“…Insect predators can regulate their intake of various nutrients to fit their needs. Proteins and lipids are the two most important and well-studied components of predators’ diets [2426]. Preys containing more nitrogen and protein are usually considered a higher quality diet for various generalist predators.…”
Section: Discussionmentioning
confidence: 99%
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“…pyri: Bonnemaison and Missonnier 1955;C. bidens: Soroker et al 2013, Madar et al 2017). Short days lead to production of the winterform Table 1.…”
Section: Cacopsylla Pyri-type Life Cyclementioning
confidence: 99%
“…In the case of C. permixta , the winter forms are larger in size, darker in body colour and lack any surface spinules on the forewings as opposed to the extended spinules found in the summer form (Burckhardt & Hodkinson, ). Apart from morphology, little is known about any physiological and biochemical differences between summer and winter forms, although there is some evidence that such differences exist (Bues, Boudinhon, Toubon, Faivre, & Arcier, ; Madar, Zamir, Litovsky, & Soroker, ; Martini, Hoyte, & Stelinski, ; Seemüller & Schneider, ). For example, the winter form of C. pyricola has been shown to carry higher titres of Ca .…”
Section: Introductionmentioning
confidence: 99%