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Drought intensity and frequency have contrasting effects on development time and survival of the green spruce aphid

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1 Elatobium abietinum (Walker) is the most important defoliating pest of Sitka spruce
Picea sitchensis (Bong.) Carr. Climate change in the U.K. is predicted to increase
incidences of spring–summer drought events, with the aphid expected to respond to
these changes. This will have serious implications for damage levels and growth of
infested Sitka spruce, as well as control of the aphid pest.

2 Under controlled laboratory conditions, nymphal survival rate, lifespan and generation
time of E. abietinum were examined in time-staggered trials during the spring and
autumn periods of population growth, using five levels of drought with differing
frequencies and magnitude.

3 Survivorship and lifespan were unaffected by drought stress compared with a
well-watered control. Generation time, however, was increased under severe continuous
and high amplitude intermittent drought stress. Advancement of Sitka spruce dormancy
was not supported as no differences between the autumn trials were observed
for the three parameters.

4 The findings of the present study suggest that, under severe water deficit, populations
of E. abietinum may be reduced as a result of a reduced period of time available for
reproduction. This has implications for the population development of E. abietinum
and, consequently, damage levels and growth reductions of host Sitka spruce under
altered climatic conditions.

Keywords Drought stress, Elatobium abietinum, generation time, lifespan, nymph survival, Picea sitchensis.

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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, 309–316

Bahasa

English

ISBN/ISSN

DOI: 10.1111/afe.121

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

Subjek

PERTANIAN.

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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