e-journal

Season and drought stress mediate growth and weight of the green spruce aphid on Sitka spruce

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1 The most important defoliating pest of Sitka spruce Picea sitchensis in the U.K. is the green spruce aphid Elatobium abietinum. This aphid species is expected to respond to a predicted increase in the incidence of spring–summer drought events, with serious implications for growth of infested spruce plants and control of the pest.

2 Growth rate, adult weight and nymph weight of E. abietinum were assessed under controlled laboratory conditions, using five levels of spring–summer drought of differing intensities and frequencies. Trials were time-staggered to investigate changes through season.

3 Growth rate, adult weight and nymph weight were consistently increased under low amplitude intermittent drought stress, suggesting improved host nutritional quality through the year and increased fecundity.

4 A complex response under severe and low amplitude intermittent drought stress was also observed, mediated by season. Although an overall reduction in host quality was typically observed, continuous severe stress improved host quality during the autumn. Despite this, the onset of dormancy was unaffected.

5 The findings of the present study have implications for E. abietinum population development, Sitka spruce growth and biological control of the species under climate change and increased drought frequency.

Keywords Adult weight, drought, Elatobium abietinum, mRGR, nymph weight, Picea sitchensis.

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Ketersediaan

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Informasi Detail

Judul Seri

Agricultural and Forest Entomology

No. Panggil

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Penerbit

London : The Royal Entomological Society., 2015

Deskripsi Fisik

Agricultural and Forest Entomology (2015), 17, 48–56

Bahasa

English

ISBN/ISSN

DOI: 10.1111/afe.120

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

(2015), 17, 48–56

Subjek

PERTANIAN.
KEHUTANAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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