Perception of achromatic cues during host location of a pupal parasitoid

Fischer, Sabine; Samietz, Jörg; Wäckers, Félix; Dorn, Silvia

doi:10.1046/j.1570-7458.2003.00004.x

Cited by 15 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the magnitude of reaction to chromatic cues in P. turionellae on the close range is striking. The speciesÕ general responsiveness toward model cylinders with colored bands in the current study (90 Ϯ 8%) was signiÞcantly higher than to models offering bands with only achromatic contrast to the background (56 Ϯ 3%; 2 test; 2 ϭ 29.0, df ϭ 1, P Ͻ 0.0001) (Fischer et al 2003). In the experiments with both achromatic and chromatic cues, the response peaked at the center of the favored cue areas.…”

Section: Discussioncontrasting

confidence: 52%

“…The current study and further experiments in the same species summarized above (Fischer et al 2003) suggest that contrasts (chromatic or achromatic) rather than speciÞc color characteristics are used by P. turionellae in visual host location. Furthermore, the species responds signiÞcantly stronger to chromatic cues than to achromatic cues on identical models.…”

Section: Discussionmentioning

confidence: 50%

“…tical to those used in this study (Fischer et al 2003). Accordingly, in the absence of chromatic vision, the "darker" color should be preferred, and discrimination of colors of similar total reßectance should not be possible.…”

Section: Discussionmentioning

confidence: 92%

“…Pimpla turionellae (L.) (Ichneumonidae), an endoparasitoid of concealed lepidopteran pupae (Sandlan 1982), is known to orient toward strong contrasts in total reßectance during host location (Sandlan 1980, Fischer et al 2003. We hypothesized that P. turionellae additionally uses chromatic cues to locate its hidden host.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Perception of Chromatic Cues During Host Location by the Pupal ParasitoidPimpla turionellae(L.) (Hymenoptera: Ichneumonidae)

Fischer¹,

Samietz²,

Wäckers³

et al. 2004

Environ Entomol

Self Cite

View full text Add to dashboard Cite

Chromatic and achromatic plant cues are expected to be particularly important for parasitoids of endophytic pupal hosts, because these stages do not feed and therefore avoid volatile emission caused by plant tissue damage. Endophytic feeding can cause discoloration or desiccation, leading to changes in color and/or brightness of infested plant parts that may be visually detected by parasitoids. The role of color cues in the host-Þnding behavior of parasitoids is poorly understood, and the visual system of most parasitoid species has not yet been investigated. We studied color discrimination ability and innate color preferences in the pupal parasitoid Pimpla turionellae (L.) (Hymenoptera: Ichneumonidae) during location of concealed hosts. Responses to combinations of yellow and blue bands of different reßectance intensities were investigated on cylindrical models of plant stems. The parasitoidÕs reaction to these chromatic cues was evaluated by scoring the number of ovipositor insertions into the colored bands. Female parasitoids discriminated blue from yellow irrespective of total reßectance and inserted their ovipositors signiÞcantly more often into the blue area. True color vision is demonstrated for the examined species, and responses to chromatic cues are discussed in relation to their importance for host location in parasitoids. Results of this study and of our previous work suggest that P. turionellae uses contrasts (chromatic or achromatic) rather than speciÞc color characteristics in visual host location.

show abstract

Section: Discussioncontrasting

confidence: 52%

Section: Discussionmentioning

confidence: 50%

Section: Discussionmentioning

confidence: 92%

mentioning

confidence: 99%

See 2 more Smart Citations

Perception of Chromatic Cues During Host Location by the Pupal ParasitoidPimpla turionellae(L.) (Hymenoptera: Ichneumonidae)

Fischer¹,

Samietz²,

Wäckers³

et al. 2004

Environ Entomol

Self Cite

View full text Add to dashboard Cite

show abstract

“…Visual cues used by insects have been widely studied in parasitiods during host location from a distance and after landing (Fischer et al 2003). We found G. molesta has an obvious color/wavelength preference, especially for green and violet wavelengths, which might be also used for host location, and we further identi-Þed an optimal light intensity, as number of LEDs, for attracting G. molesta.…”

Section: Discussionmentioning

confidence: 71%

Phototaxis of <I>Grapholitha molesta</I> (Lepidoptera: Olethreutidae) to Different Light Sources

et al. 2014

View full text Add to dashboard Cite

The Oriental Fruit Moth Grapholita molesta (Busck) causes substantial damage to stone and pome fruit crops worldwide. Light-based traps offer a potential means for pest monitoring and management. In this study, we tested the preference of G. molesta for the following light sources: monochromatic light produced from light-emitting diodes (LEDs) (red, orange, yellow, green, blue, violet, and white), specific wavelengths of light produced from filters (405, 450, 480, 512, 540, 576, and 610 nm), and polychromatic light produced by different numbers (0, 12, 24, and 36) of green, blue, and violet LEDs. The arrangement of polychromatic lights was based on an orthogonal design matrix of L16 (4(3)). Based on the results of former studies, we further determined the optimal number of green and violet LEDs. The results showed that: 1) G. molesta strongly preferred the green, violet, and blue LEDs; 2) G. molesta significantly preferred light at 405 nm, followed by 540 nm, and showed no phototaxis to 480 nm; 3) for the polychromatic light configuration, violet and green were the factors that determined the preference of G. molesta, and the lamp with 12 violet LEDs captured the most moths; and 4) for the lamps with different light intensities, 36 violet LEDs or 12 green LEDs attracted the most moths, with the former performing better.

show abstract

Temperature affects interaction of visual and vibrational cues in parasitoid host location

2006

Self Cite

View full text Add to dashboard Cite

Parasitoid host location in nature is facilitated by simultaneously using different information sources. How multisensory orientation on the same spatial scale is influenced by environmental conditions is however poorly understood. Here we test whether changes in reliability of cues can cause parasitoids to alter multisensory orientation and to switch to cues that are more reliable under extreme temperatures. In the ichneumonid wasp Pimpla turionellae, multisensory use of thermally insensitive vision and thermally sensitive mechanosensory host location by vibrational sounding (echolocation on solid substrate) was investigated with choice experiments on plant-stem models under optimum temperature (18 degrees C), at high- (28 degrees C) and low-temperature limits (8 degrees C) of vibrational sounding. Temperature affected relative importance of vibrational sounding whereas visual orientation did not vary. At 18 degrees C, parasitoids used visual and vibrational cues with comparable relative importance. At 8 and 28 degrees C, the role of vibrational sounding in multisensory orientation was significantly reduced in line with decreased reliability. Wasps nearly exclusively chose visual cues at 8 degrees C. The parasitoids switch between cues and sensory systems depending on temperature. As overall precision of ovipositor insertions was not affected by temperature, the parasitoids fully compensate the loss of one cue provided another reliable cue is available on the same spatial scale.

show abstract

Perception of achromatic cues during host location of a pupal parasitoid

Cited by 15 publications

References 22 publications

Perception of Chromatic Cues During Host Location by the Pupal ParasitoidPimpla turionellae(L.) (Hymenoptera: Ichneumonidae)

Perception of Chromatic Cues During Host Location by the Pupal ParasitoidPimpla turionellae(L.) (Hymenoptera: Ichneumonidae)

Phototaxis of <I>Grapholitha molesta</I> (Lepidoptera: Olethreutidae) to Different Light Sources

Temperature affects interaction of visual and vibrational cues in parasitoid host location

Contact Info

Product

Resources

About