Phototactic Action Spectrum for Whitefly and the Question of Colour Vision

Macdowall, F. D. H.

doi:10.4039/ent104299-3

Cited by 48 publications

(31 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The role of brightness perception in color discrimination has been documented in insect vision; thus, it is possible that this is also an important component in potato leafhopper host Þnding (Macdowall 1972, Fukushi 1990, Vernon et al 1998). At 555 nm, a wavelength difference of only Ϸ1 nm is necessary to produce a noticeable difference between two surfaces in most organisms (Hurvich 1981).…”

Section: Discussionmentioning

confidence: 95%

Potato Leafhopper (Homoptera: Cicadellidae) Varietal Preferences in Edible Beans in Relation to Visual and Olfactory Cues

et al. 2004

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 95%

Potato Leafhopper (Homoptera: Cicadellidae) Varietal Preferences in Edible Beans in Relation to Visual and Olfactory Cues

et al. 2004

View full text Add to dashboard Cite

“…An alternative explanation is that the attraction to red is a physiological artifact. Macdowall (1972) and Hardie (1989) describe a process of spatial summation within the compound eye that seemed to explain a small secondary peak in sensitivity at red wavelengths (600 nm) in the whiteßy Trialeurodes vaporariorum (Westwood) and the aphid Aphis fabae Scopoli. The eyes of these two species contain red screening pigments and scattering of red light by these pigments may have increased the amount of light received by adjacent ommatidia, resulting in an increase in the overall of level of excitation over and above that which red light would otherwise have produced.…”

Section: Discussionmentioning

confidence: 98%

Influence of Sticky Trap Color and Height Above Ground on Capture of AlateElatobium abietinum(Hemiptera: Aphididae) in Sitka Spruce Plantations

2011

View full text Add to dashboard Cite

A series of field trials were used to assess the practicality of using sticky traps to monitor populations of green spruce aphid, Elatobium abietinum (Walker), in plantations of Sitka spruce. The highest numbers of alate E. abietinum were caught on sticky traps placed in the upper third of the live canopy at 9-17 m above the ground, whereas low numbers of aphids were caught just below the live canopy or at 2 m above the ground. Trials in 2005 with sticky traps of different colors showed that significantly more alate E. abietinum were caught on yellow, red, and green sticky traps than on white, blue, and black traps. A repeat trial in 2007 resulted in significantly more alate aphids being caught on red sticky traps than on traps of any other color except for green. Attraction to red is unusual among aphids, as aphids are thought not to possess a red-sensitive photoreceptor. The attraction of E. abietinum to red-colored sticky traps suggests that conifer-feeding aphids might have a fundamentally different color response compared with aphids that live on cereals, grasses, or herbaceous plants. Alternatively, the attraction to red might be a physiological artifact related to the presence of red-screening pigments in the aphid's compound eye.

show abstract

“…Unfortunately, almost no information is available on the sensory physiology of homopteran eyes, possibly because of their small size (89,101). Nonetheless, action spectra do suggest that homopteran visual sensitivity extends fr om 350 to 600 nm, peaking at ca 550 nm (correspond ing to the peak of foliar reflectance-transmittance) (20, 30, 97,110,160). This suggests that the spectral sensitivity of the homopteran eye may be adapted to detect foliar hue.…”

Section: Visual Detection Of Plants From Nearbymentioning

confidence: 91%

Visual Detection of Plants by Herbivorous Insects

Prokopy¹,

Owens²

1983

Annu. Rev. Entomol.

744

494

View full text Add to dashboard Cite

INTRODUCTIONThere are hundreds of thousands of insect species for which plants provide a variety of resources such as adult food, mating encounter sites, oviposi tional sites, food for immatures, shelter from harmful biotic or abiotic agents, or transport (90,149,181). Yet our understanding of the process by which an insect detects a resource-furnishing plant is not well developed. This is particularly true for the visual aspects of plant detection by insects.To date, studies of this aspect have focused on the visual location of fl owers by pollinators (80). Visual location of plants by herbivores, parasitoids, or predators has received no more than marginal or scattered attention (6,64,79,82,88,98,100,104,151,152,156,162,169).Before focusing attention exclusively on insect vision, it is useful to briefl y review some general aspects of animal vision. Here, vision is defi ned as the ability to perceive spatial patterns. The physical stimulus that defines a pattern can be regarded as a spatiotemporal distribution of photo fl ux that differs in total energy and frequency composition, and thus provides the visual color cues of brightness (intensity of perceived reflected light), hue (dominant wavelength of reflected light), and saturation (spectral purity of reflected light). The spatial distribution of photon flux provides information on shape, size, distance, and motion. Visual patterns depend upon the nature of the viewed surface, the optical background, the illuminant, and 337 0066-4170/83/0101·0337$02.00 Annu. Rev. Entomol. 1983.28:337-364. Downloaded from www.annualreviews.org by Stanford University -Main Campus -Lane Medical Library on 09/28/12. For personal use only. Quick links to online content Further ANNUAL REVIEWS 338 PROKOPY & OWENSthe viewer's angle and sensitivity. As an active, complex process, vision depends not only upon events in the entire visual fi eld but also upon patterns of expectation in the visual processing system itself, some of which are established through prior visual experience.Description and analysis of the natural optical environment in terms of the visual system of an animal is known as visual ecology, which presumes that specialized visual systems are of adaptive advantage to the animal possessing them. Visual ecologists quantify physical attributes of optical patterns in the environment, particularly those of resource items. How animals solve common visual problems is best understood when data on the physical environment is combined with data on animal behavior and on the morphology and physiology of visual systems.The visual ecology approach was formulated during studies of sea fishes (94,96,113) and has subsequently been adapted to studies of land-dwelling animals (56,96,147), including insects (80).Our review is concerned primarily with the visual ecology of herbivorous insects. Accordingly, we deal with the following elements that, in combina tion, comprise a visual ecology approach: the evolutionary history of plants and insects; the visual properties of natural illuminan...

show abstract

Phototactic Action Spectrum for Whitefly and the Question of Colour Vision

Cited by 48 publications

References 12 publications

Potato Leafhopper (Homoptera: Cicadellidae) Varietal Preferences in Edible Beans in Relation to Visual and Olfactory Cues

Potato Leafhopper (Homoptera: Cicadellidae) Varietal Preferences in Edible Beans in Relation to Visual and Olfactory Cues

Influence of Sticky Trap Color and Height Above Ground on Capture of AlateElatobium abietinum(Hemiptera: Aphididae) in Sitka Spruce Plantations

Visual Detection of Plants by Herbivorous Insects

Contact Info

Product

Resources

About