NDLI: Where to from here? The mechanisms enabling the movement of first instar caterpillars on whole plants using Helicoverpa armigera (Hübner)

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Arthropod-Plant Interactions : Volume 2, Issue 3, September 2008

Arthropod-Plant Interactions : Volume 2, Issue 2, June 2008

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Arthropod-Plant Interactions : Volume 1

Where to from here? The mechanisms enabling the movement of first instar caterpillars on whole plants using Helicoverpa armigera (Hübner)

Content Provider	Springer Nature Link
Author	Perkins, Lynda E. Cribb, Bronwen W. Hanan, Jim Glaze, Ezekiel Beveridge, Christine Zalucki, Myron P.
Copyright Year	2008
Abstract	Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) is an economically-important, polyphagous herbivore in Old World countries. The distribution of larvae within various host plants has been described, but few studies have tried to determine the behavioural mechanisms by which the given distributions arose. Our aim was to determine the mechanisms which enable larval movement on pea plants, starting with first instars. Observations and bioassays determined larval movement in response to light and angled surfaces, as well as the effect of feeding and plant volatiles on these responses. The majority (68–72%) of 1st instars were positively phototactic towards blue, green and white light and 42% towards UV light. In the dark, larvae showed negative geotaxis. The angle of their substrate also had a kinetic effect on larvae; the steeper the angle from horizontal the more larvae moved under all conditions. Phenylacetaldehyde (a flower volatile) suppressed larval movement except at 90°. (Z)-3-Hexenyl acetate (a green leaf volatile) reversed the direction of movement at the flattest angle. Feeding lessened the probability of moving. We suggest that phototaxis and geotaxis are behaviours common to larval lepidopterans (caterpillars), and that these basic behaviours are modulated by environmental, larval, and plant factors to give observed distributions. Using a multinomial model approach, we created a flow chart to qualitatively and quantitatively represent the decision-making process of first instar H. armigera in response to the factors influencing movement.
Starting Page	197
Ending Page	207
Page Count	11
File Format	PDF
ISSN	18728855
Journal	Arthropod-Plant Interactions
Volume Number	2
Issue Number	4
e-ISSN	18728847
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-09-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	First instar larvae Foraging Geotaxis Movement Multinomial models Phototaxis Plant volatiles Plant Pathology Behavioural Sciences Ecology Plant Sciences Invertebrates Entomology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Insect Science Agronomy and Crop Science

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The role of two plant-derived volatiles in the foraging movement of 1st instar Helicoverpa armigera (Hübner): time to stop and smell the flowers

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Where to from here? The mechanisms enabling the movement of first instar caterpillars on whole plants using Helicoverpa armigera (Hübner)

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Where to from here? The mechanisms enabling the movement of first instar caterpillars on whole plants using Helicoverpa armigera (Hübner)