The movement and distribution of Helicoverpa armigera (Hübner) larvae on pea plants is affected by egg placement and flowering

Perkins, L. E, Cribb, B. W, Hanan, J and Zalucki, M. P (2010) The movement and distribution of Helicoverpa armigera (Hübner) larvae on pea plants is affected by egg placement and flowering. Bulletin of Entomological Research, 100 5: 591-598. doi:10.1017/S0007485309990654


Author Perkins, L. E
Cribb, B. W
Hanan, J
Zalucki, M. P
Title The movement and distribution of Helicoverpa armigera (Hübner) larvae on pea plants is affected by egg placement and flowering
Formatted title
The movement and distribution of Helicoverpa armigera (Hübner) larvae on pea plants is affected by egg placement and flowering
Journal name Bulletin of Entomological Research   Check publisher's open access policy
ISSN 0007-4853
1475-2670
Publication date 2010-10
Year available 2010
Sub-type Article (original research)
DOI 10.1017/S0007485309990654
Volume 100
Issue 5
Start page 591
End page 598
Total pages 8
Place of publication United Kingdom
Publisher Cambridge University Press
Collection year 2011
Language eng
Subject C1
960405 Control of Pests, Diseases and Exotic Species at Regional or Larger Scales
060201 Behavioural Ecology
Formatted abstract
The distribution and movement of 1st instar Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larvae on whole garden pea (Pisum sativum L.) plants were determined in glasshouse trials. This economically-important herbivore attacks a wide variety of agricultural, horticultural and indigenous plants. To investigate the mechanisms underlying larval intra-plant movement, we used early-flowering and wild-type plant genotypes and placed eggs at different vertical heights within the plants, one egg per plant. Leaf water and nitrogen content and cuticle hardness were measured at the different plant heights. Of 92 individual larvae, 41% did not move from the node of eclosion, 49% moved upwards and 10% moved downwards with the distance moved being between zero and ten plant nodes. Larvae from eggs placed on the lower third of the plant left the natal leaf more often and moved further than larvae from eggs placed in the middle or upper thirds. The low nutritive value of leaves was the most likely explanation for more movement away from lower plant regions. Although larvae on flowering plants did not move further up or down than larvae on non-flowering plants, they more often departed the leaflet (within a leaf) where they eclosed. The final distribution of larvae was affected by plant genotype, with larvae on flowering plants found less often on leaflets and more often on stipules, tendrils and reproductive structures. Understanding intra-plant movement by herbivorous insects under natural conditions is important because such movement determines the value of economic loss to host crops. Knowing the behaviour underlying the spatial distribution of herbivores on plants will assist us to interpret field data and should lead to better informed pest management decisions.
Keyword behaviour
First Instars
Intra-plant movement
plant attributes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 15 Jul 2010, 10:00:48 EST by Joni Taylor on behalf of School of Biological Sciences