Cocoon‐spinning larvae of Oriental fruit moth and Indianmeal moth do not produce aggregation pheromone

Jumean, Zaid; Fazel, Leila; Wood, Charlene; Cowan, Thomas; Evenden, Maya L.; Gries, Gerhard

doi:10.1111/j.1461-9563.2008.00415.x

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…In those studies, the authors suggested that these chemicals elicited behavioural responses that are indirectly beneficial to the organisms living in groups. Some suggested increases in individual survival, growth or improved development (Ghent, 1960; Stamp & Bowers, 1990; Inouye & Johnson, 2005; Despland & Le Huu, 2006; Jumena et al ., 2009). Others proposed an increased efficiency in the exploitation of food or in the defensive ability against natural enemies (Capinera, 1980; Tsubaki & Shiotsu, 1982; Deneubourg et al ., 1990; Hunter, 2000; Ruzicka & Zemek, 2008).…”

Section: Discussionmentioning

confidence: 99%

Chemical interaction between the larva of a dipteran parasitoid and its coleopteran host: A case of exploitation of the communication system during the searching behaviour?

Groba

Castelo

2011

Bull. Entomol. Res.

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The robber fly Mallophora ruficauda is one of the principal apicultural pests in the Pampas region of Argentina. As adults, the flies prey on honey bees and other insects; while, as larvae, they parasitize scarab beetle larvae. Females of M. ruficauda lay eggs away from the host in tall grasses. After being dispersed by the wind, larvae drop to the ground, where they dig in search of their hosts. It is known that second instar larvae of M. ruficauda exhibit active host searching behaviour towards its preferred host, third instar larva of Cyclocephala signaticollis, using host-related chemical cues. Furthermore, previous works show that these chemical cues are produced in the posterior body half of hosts. However, the precise anatomical origin of these cues and whether they mediate any behaviour of C. signaticollis larvae remains yet unknown. In order to determine the precise origin of the chemical cue, we carried out olfactometer assays with different stimuli of extracts of the posterior C. signaticollis body half. Additionally, we tested whether C. signaticollis is attracted to any of the same extracts as in the previous experiments. We found that both second instar of M. ruficauda and third instar of C. signaticollis are attracted to extracts of the fermentation chamber (proctodeum). This is the first report of attraction of conspecific larvae in scarab beetles. We discuss a possible case of system communication exploitation in an immature parasitoid-host system.

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Section: Discussionmentioning

confidence: 99%

Chemical interaction between the larva of a dipteran parasitoid and its coleopteran host: A case of exploitation of the communication system during the searching behaviour?

Groba

Castelo

2011

Bull. Entomol. Res.

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“…Later in the season, when diapausing larvae emerge from the fruits, G. molesta individuals must first orient toward an overwintering site and then travel some distance to reach favourable overwintering microhabitats (Jumean et al ., 2009; Notter-Hausmann & Dorn, 2010). However, it is unclear how the larvae are able to locate suitable sites in the trees, but previous studies suggest that visual factors play an important role in the selection of overwintering sites (Hausmann et al ., 2004; Nalepa et al , 2005; Prokopy & Owens, 1983).…”

Section: Discussionmentioning

confidence: 99%

Where does Grapholita molesta (Busck) (Lepidoptera: Tortricidae) overwinter in adjacent peach, pear and apple orchards?

Yang

Feng

Wang

et al. 2015

Bull. Entomol. Res.

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The Oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), is a major pest of tree fruits worldwide, and the diapausing larvae overwinter in cryptic habitats. Investigations of overwintering G. molesta were conducted in adjacent peach, pear and apple orchards in Northern China over three consecutive winters to determine the overwintering site and habitat preferences of the moth. Counts of overwintering larvae in the different orchards demonstrated that the late-maturing peach orchard ('Shenzhou honey peach') was the most preferred overwintering habitat with more than 90% of the collected larvae. Larvae were more abundant in host trees, and they very rarely overwintered in the soil. The overwintering site preferences on the host trees were significantly different; over 50% larvae were located in the tree trunks, and followed by main branches. Most of the G. molesta overwintered on the sunny side of the host trees at or below 60 cm from the ground; a few were cocooned on the shaded sides of the trees or greater than 60 cm from the ground. G. molesta began overwintering between August and October, mid- to late September was the peak period for entering winter diapause during 2011-2013 (77.78, 67.59 and 71.15%, respectively). Our findings improve understanding of the orchard habitat and overwintering site preferences of G. molesta and would be useful in the development of efficient forecasting and pest-management strategies for orchards during the winter and early spring.

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On-site airborne pheromone sensing

Wehrenfennig¹,

Schott²,

Gasch³

et al. 2013

Anal Bioanal Chem

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Pheromones and other semiochemicals play an important role in the natural world by influencing the behavior of plants, mammals, and insects. In the latter case, species-dependent pheromone communication has numerous applications, including the detection, trapping, monitoring and guiding of insects, as well as pest management in agriculture. On-site sensors are desirable when volatile organic compounds (VOCs) are used as semiochemicals. Insects have evolved highly selective sensors for such compounds, so biosensors comprising complete insects, isolated organs or individual proteins can be highly effective. However, isolated insect organs have a limited lifetime as biosensor, so biomimetic approaches are needed for prolonged monitoring, novel applications, or measurements in challenging environments. We discuss the development of on-site biosensors and biomimetic approaches for airborne-pheromone sensing, together with biomimetic VOC sensor systems. Furthermore, the infochemical effect describing the anthropogenic contamination of the ecosystem through semiochemicals, will be considered in the context of novel on-site pheromone sensing-systems.

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Cocoon‐spinning larvae of Oriental fruit moth and Indianmeal moth do not produce aggregation pheromone

Cited by 3 publications

References 23 publications

Chemical interaction between the larva of a dipteran parasitoid and its coleopteran host: A case of exploitation of the communication system during the searching behaviour?

Chemical interaction between the larva of a dipteran parasitoid and its coleopteran host: A case of exploitation of the communication system during the searching behaviour?

Where does Grapholita molesta (Busck) (Lepidoptera: Tortricidae) overwinter in adjacent peach, pear and apple orchards?

On-site airborne pheromone sensing

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