Visual cues of oviposition sites and spectral sensitivity of Cydia strobilella L.

Jakobsson, Johan; Henze, Miriam J.; Svensson, Glenn P.; Lind, Olle; Anderbrant, Olle

doi:10.1016/j.jinsphys.2017.06.006

Cited by 11 publications

(18 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the attractiveness of white to C. pomonella is twice that of blue [66]. For Heliothis armigera (Hübner), the green colour is more attractive than the brown, whereas G. molesta shows oviposition preferences for dark red fruits [28], and Cydia strobilella L. catches were higher in red traps compared to black, white, or orange ones [67]. In Argyrotaenia montezumae (Walsingham), a higher number of eggs per female was laid on green, blue, and yellow substrates than on transparent and pink ones [68].…”

Section: Discussionmentioning

confidence: 99%

Do Grapholita funebrana Infestation Rely on Specific Plum Fruit Features?

Rizzo

Farina

Saiano

et al. 2019

Insects

View full text Add to dashboard Cite

The effective control of the plum fruit moth, Grapholita funebrana (Lepidoptera: Tortricidae) still represents a difficult challenge for organic plum farming. Little information is available on the susceptibility of plum cultivars to this moth pest. We investigated the roles of several fruit parameters (i.e., shape, volume, hardness, fruit colour, and physiochemical properties) on the susceptibility of four different plum cultivars (Angeleno, Friar, President and Stanley) to G. funebrana attack. Field data demonstrated the importance of some fruit parameters (i.e., elongation index, sugar degree, titratable acidity, cover colour percentage) on susceptibility to G. funebrana infestation. Under laboratory conditions, colour and shape had a significant role in determining the time spent on false fruits, i.e., female moths preferred yellow and rounded fruits over elongated red or green fruits. Angeleno (yellow and rounded fruits) and Stanley (green and elongated fruits) were the most and least susceptible cultivars, respectively. Overall, this study adds useful knowledge about plum cultivar susceptibility to G. funebrana. Information reported here may be useful to improve integrated pest management strategies both in conventional and organic orchards because the use of less susceptible cultivars may reduce insecticidal treatments, limiting the development of resistance in target insects and the harmful side effects on beneficial species.Insects 2019, 10, 444 2 of 16 of the susceptibility of different plum cultivars to the main pests can provide useful information for plum improvement programs and pest management strategies.Grapholita funebrana Treitschke (Lepidoptera Tortricidae), the plum fruit moth (PFM), is one of the main pests of plum orchards in Europe. This species is oligophagous and attacks different host plants within the family Rosaceae, such as the fruits of plums, cherries, and peaches. This moth can complete one or two generations per year in many parts of central and eastern Europe [19] and three generations per year in Italy [20,21]. As with other moths, females of PFM attract mates using pheromone signals [22][23][24] and lay eggs on developing fruits of host plants [25]. Neonate larvae typically bore into immature fruits, where they feed and develop until pupation. Damage is due to the feeding activity of the larvae inside the fruits, which causes changes in fruit colouration, early ripening and fruit fall. Furthermore, infested fruits show penetration holes made by neonate larvae, which are characterised by the presence of gum, and exit holes made by mature larvae leaving the fruit [26]. Both result in reduced marketability and significant yield decreases. In conventional agriculture, this pest is primarily controlled by the use of broad-spectrum insecticides [19]. In organic plum orchards, good fruit protection can be achieved by alternating a low number of spinosad applications and mineral oil applications, despite the short period of effectiveness typical of spinosad [27].In other tortricid spec...

show abstract

Section: Discussionmentioning

confidence: 99%

Do Grapholita funebrana Infestation Rely on Specific Plum Fruit Features?

Rizzo

Farina

Saiano

et al. 2019

Insects

View full text Add to dashboard Cite

show abstract

“…We have found evidence for three spectral types of photoreceptor, with sensitivity peaks for UV, blue and green light. More than three receptor types have been described in many butterflies (Arikawa & Stavenga, ), yet rarely in moths (Belušiç et al., ; Jakobsson et al., ; Langer, Hamann, & Meinecke, ; Warrant et al., ). We cannot exclude that we missed additional receptor types in A. plantaginis , but these receptors, if present, either have a spectral sensitivity close to those characterized here or do not contribute substantially to the ERG.…”

Section: Discussionmentioning

confidence: 99%

“…As receptor noise and spatial summation are unknown for A. plantaginis , we set noise in the green receptor channel to 0.1, the level measured in honeybees (Vorobyev, Brandt, Peitsch, Laughlin, & Menzel, ). Assuming that each ommatidium has one UV, one blue and seven green receptors, as in various other moths (Briscoe, ; Jakobsson et al., ; Warrant, Kelber, & Kristensen, ; but see Belušiç, Šporar, & Megliç, ), we set the receptor proportions to 1:1:7 (UV:blue:green receptors). Given the uncertainty of noise in moth photoreceptors, we focus on relative chromatic contrast and also test whether our conclusions hold even for a flat receptor abundance ratio of 1:1:1.…”

Section: Methodsmentioning

confidence: 99%

“…To explore regional differences in the retina, we inserted a tungsten recording electrode either in the ventral ( n = 9) or in the dorsal ( n = 5) half of one compound eye. The eye was illuminated via the central fibre of a light guide, whose angular position and distance were adjusted to maximize responses to flashes of 40 ms duration separated by pauses of 5 s. After dark adaptation for 30 min, the spectral sensitivity was measured up to four times (see Supporting Information Methods) presenting narrowband spectral flashes of equal photon flux as described previously (Jakobsson, Henze, Svensson, Lind, & Anderbrant, ; Telles et al., ). Preceding and following each spectral series, we determined a voltage response–intensity ( V ‐log I ) relationship using flashes of white light with increasing intensity I .…”

Section: Methodsmentioning

confidence: 99%

Section: Model Calculationsmentioning

confidence: 99%

See 2 more Smart Citations

An aposematic colour‐polymorphic moth seen through the eyes of conspecifics and predators – Sensitivity and colour discrimination in a tiger moth

et al. 2018

Self Cite

View full text Add to dashboard Cite

Although predation is commonly thought to exert the strongest selective pressure on coloration in aposematic species, sexual selection may also influence coloration. Specifically, polymorphism in aposematic species cannot be explained by natural selection alone. Males of the aposematic wood tiger moth (Arctia plantaginis) are polymorphic for hindwing coloration throughout most of their range. In Scandinavia, they display either white or yellow hindwings. Female hindwing coloration varies continuously from bright orange to red. Redder females and yellow males suffer least from bird predation. White males often have higher mating success than yellow males. Therefore, we ask whether females can discriminate the two male morphs by colour. Males approach females by following pheromone plumes from a distance, but search visually at short range. This raises the questions whether males discriminate female coloration and, in turn, whether female coloration is also sexually selected. Using electroretinograms, we found significantly larger retinal responses in male than female A. plantaginis, but similar spectral sensitivities in both sexes, with peaks in the UV (349 nm), blue (457 nm) and green (521 nm) wavelength range. According to colour vision models, conspecifics can discriminate white and yellow males as separate morphs, but not orange and red females. For moths and birds (Cyanistes caeruleus), white males are more conspicuous against green and brown backgrounds, mostly due to UV reflectivity, and red females are slightly more conspicuous than orange females. The costly red coloration among females is likely selected by predator pressure, not by conspecifics, whereas male colour polymorphism is probably maintained, at least partly, by the opposing forces of predation pressure favouring yellow males, and female preference for white males. Whether or not the preference for white males is based on visual cues requires further testing. The evolution of polymorphic aposematic animals can be better understood when the visual system of the species and their predators is taken into consideration. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13100/suppinfo is available for this article.

show abstract

Brightness mediates oviposition in crepuscular moth, Grapholita molesta

Yang

Fan

et al. 2020

J Pest Sci

View full text Add to dashboard Cite

Plant colouration is known to be used by some nocturnal flower-visiting insects to foraging among colourful flowers in dim light. However, it remains unknown whether crepuscular species possibly reliably discriminate plant colouration (i.e. colour and/or brightness) for oviposition even driven by challenges of variably light conditions and similar leaf colouration. Here, we explored this question in the oriental fruit moth Grapholita molesta, a major pest of stone fruits worldwide, using coloured squares under changing illuminants (1000, 100, 1 and 0.01 mW/m 2 ). G. molesta female preferred to oviposit on green and orange over yellow, red, blue and purple with a lower discrimination at starlight (0.01 mW/m 2 ), whereas the preferential brighter white can be discriminated clearly from those achromatic grey and black at all tested light intensities. When both cues were presented in conflicting for oviposition, the moths were more attracted to brightness than colour cues irrespective of light intensity they are exposed to. Interestingly, there was a decrease in the reflectance between young and old leaves of P. persica at similar wavelengths between 500 and 550 nm, providing an apparent brightness. Ovipositing females preferred the brighter light green over the dark green. Our results indicate that as a more reliable cue, brightness of leaves rather than colour plays a more important role for mediating crepuscular moth G. molesta to lay eggs on young leaves in microhabitats in changing light environments. We discuss that the brightness oriented in oviposition task in complex orchards is relevant to leaf apparency.

show abstract

Visual cues of oviposition sites and spectral sensitivity of Cydia strobilella L.

Cited by 11 publications

References 65 publications

Do Grapholita funebrana Infestation Rely on Specific Plum Fruit Features?

Do Grapholita funebrana Infestation Rely on Specific Plum Fruit Features?

An aposematic colour‐polymorphic moth seen through the eyes of conspecifics and predators – Sensitivity and colour discrimination in a tiger moth

Brightness mediates oviposition in crepuscular moth, Grapholita molesta

Contact Info

Product

Resources

About