Ecology of Helicoverpa-Armigera (Hubner) and Heliothis-Punctigera (Wallengren) in the Inland of Australia - Larval Sampling and Host-Plant Relationships During Winter and Spring

Zalucki, Myron P.; Murray, D. A. H.; Gregg, Peter; Fitt, G. P.; Twine, P. H.; Jones, Christopher M.

doi:10.1071/zo9940329

Cited by 155 publications

(174 citation statements)

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“…This result is even more surprising taking into account that H. armigera is a polyphagous herbivore, known to feed on more than 200 different host plant species belonging to 47 families (Zalucki et al 1986(Zalucki et al , 1994. Irrespective of the growth stages of the host plants, Influence of an endophytic fungus on host plant selection 57 adult females (laboratory or field strain) exhibited a significantly higher preference for endophyte-infected plants, ovipositing more eggs on these plants as compared to endophyte-free plants.…”

Section: Discussionmentioning

confidence: 82%

Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes

Jallow

Dugassa‐Gobena

Vidal

2008

Arthropod-Plant Interactions

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Recently the role of micro-organisms as mediators of plant-herbivore interactions has been increasingly acknowledged in ecological research. We investigated the interaction between an unspecialized root fungal endophyte (Acremonium strictum) and the polyphagous moth Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), in greenhouse and laboratory bioassays. Specifically we examined in tomato (Lycopersicon esculentum Mill.) the systemic effects of the endophytic fungus on the host selection behaviour of female moths for oviposition and the volatile profiles of host plants to understand the mechanisms acting in this multi-trophic model system. Both laboratory and field strains of H. armigera moths oviposited more on leaves of A. strictum inoculated plants as compared to endophyte-free plants, both in free flight cages and in tethered moth laboratory experiments; the moth's preferences were significant between 10 and 18 days after inoculation. The analysis of volatile profiles showed strong quantitative differences between treatments. Endophyte inoculated plants emitted diverse terpenes and sesquiterpenes at significantly lower amounts as compared to endophyte free-plants, except for a-terpinene, which did not differ between the treatments, and trans-bcaryophyllene, which was emitted in significantly higher amounts on inoculated plants. b-Thujene and a-phellandrene accounted for 73.3 and 12.0% of total amounts of volatiles emitted from endophyte-free and inoculated plants, respectively. Our findings demonstrate that A. strictum is able to systemically influence the host selection of H. armigera moths for oviposition; conceivably mediated by the induced changes in volatile emissions (and probably additional biochemical parameters of the host plants, which have not been analysed so far). We argue for a more detailed assessment of micro-organisms invisibly colonizing plants, when studying plant-herbivore or multitrophic interactions.

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Section: Discussionmentioning

confidence: 82%

Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes

Jallow

Dugassa‐Gobena

Vidal

2008

Arthropod-Plant Interactions

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“…5), evidence for field resistance to insecticides was not recorded in this species until relatively recently (Gunning et al 1997b). This is probably due to the ecology and population structure of H. punctigera which breeds on native host plants in the absence of insecticides in inland Australia (Zalucki et al 1986(Zalucki et al , 1994Gregg et al 1995;Oertel et al 1999). Helicoverpa punctigera re-invades agricultural regions annually (Fitt et al 1989;Maelzer et al 1996;Maelzer & Zalucki 1999Zalucki & Furlong 2005).…”

Section: Area Of Cotton 000 Hamentioning

confidence: 99%

The future of IPM: whither or wither?

Zalucki

Adamson

Furlong

2009

Australian Journal of Entomology

161

146

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The acronym IPM (integrated pest management) has been around for over 50 years and now not only supposedly guides research and extension in pest management but also markets pesticides, is claimed to be undertaken by many growers, and even resonates with public perceptions and politicians. Whether or not IPM programs are sustainable in the longer term under the conflicting stresses and strains of the modern agricultural environment is debatable. We analyse three case studies of IPM development in Australia: citrus IPM in central Queensland, Brassica IPM in southeast Queensland and Helicoverpa management in cotton in eastern Australia. Many management practices for these pests have changed over time. In the more stable citrus system classical biological control along with changed practices (reduced pesticide use) have effectively controlled imported scale insect pests. In Brassicas and cotton, IPM is predominantly of the sample and spray variety where, increasingly, less broad-spectrum insecticides are used and, in cotton, Helicoverpa management includes the deployment of transgenic plants. We question whether or not IPM principles are always consistent with market forces and whether or not the approach is universally applicable for all pest insects when implemented at the small (field or farm) scale. Farmers will adopt cost-effective approaches that minimise their financial risks. For Australia as a whole over the last 30 years insecticide input costs per hectare have increased faster than the price index, reflecting more costly insecticides, changes to the combinations of crops grown and an increase in the overall area of crops cultivated together with possible concomitant changes in pest abundance. Any pest crisis will ensure rapid changes in practice and adoption of technologies, in order to mitigate the short-term financial stresses caused. However, regression to former practices tends to follow (e.g. in Brassica crops). In most cases, we cannot objectively test if changed management practices are responsible for changes in pest abundance, as is often claimed, or if the latter is simply a consequence of the weather and/or related large-scale landscape features (e.g. area of host plants). We argue that for many systems the future of pest management practice will require a change to landscape or area-wide approaches. We suspect, given how entrenched the acronym has become, whatever the nature of the approach it will be called IPM.

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“…The cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is an important pest of a wide variety of agricultural and horticultural plants (Zalucki et al, 1986(Zalucki et al, , 1994Firempong and Zalucki, 1990). Although numerous studies addressing oviposition preference have been carried out (Jallow et al, 2001;Jallow and Zalucki, 2003;Kakimoto et al, 2003), there have been few studies on larval feeding preference, despite the feeding stage causing considerable economic damage to agricultural crops (Jallow and Zalucki, 2003;Rajapakse and Walter, 2007).…”

Section: Introductionmentioning

confidence: 99%

Larval feeding preference and performance of the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), on different flower parts of cosmos

Yamasaki

Fujisaki

2010

Appl. Entomol. Zool.

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Larvae of the polyphagous moth, Helicoverpa armigera (Lepidoptera: Noctuidae), were observed feeding intensively on disc florets of Cosmos bipinnatus Cav. (Asteraceae) in fields in western Japan during autumn. We compared larval feeding preference and performance, such as the survival rate, developmental period and pupal weight between disc florets and ray florets of C. bipinnatus in the laboratory. Larvae showed a strong preference for disc florets of C. bipinnatus. Larvae reared on disc florets showed a higher survival rate, and developed more quickly into heavier pupae than larvae reared on ray florets, suggesting that either disc florets provide the required nutrients or that ray florets contain secondary metabolites that negatively affect larval development. Although the mechanisms that elicit larval preference to disc florets remain unknown, our study demonstrated that disc florets alone generated improved growth of H. armigera larvae and might be an important food source in late autumn when larvae are preparing for overwintering.

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Ecology of Helicoverpa-Armigera (Hubner) and Heliothis-Punctigera (Wallengren) in the Inland of Australia - Larval Sampling and Host-Plant Relationships During Winter and Spring

Cited by 155 publications

References 0 publications

Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes

Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes

The future of IPM: whither or wither?

Larval feeding preference and performance of the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), on different flower parts of cosmos

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