Olfactory reactions ofCryptolaemus montrouzieri Mulsant (Col., Coccinellidae) andChrysoperla carnea (Stephens) (Neur., Chrysopidae) in relation to period of starvation

Şengonça, Ç.; Kotikal, Y. K.; Schade, Michael

doi:10.1007/bf01980348

Cited by 14 publications

(9 citation statements)

References 11 publications

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“…So, in the present study, the reactions to a special odour were measured by the number of test individuals caught in a trapping tube associated with a special sample chamber, whereas the distance walked by the arthropods in a y‐olfactometer is often the criterion for the attractiveness of volatiles ( Dean and Satasook , 1983). The present study seems also to illustrate that the starvation period causing the highest numbers of reactions of the tested arthropods has an important influence on the observed behaviour, a fact which already was made evident for larvae of predators by Sengonca et al. (1995b).…”

Section: Discussionsupporting

confidence: 72%

A modified, four‐armed olfactometer for determining olfactory reactions of beneficial arthropods

Şengonça

Kranz

2001

Anz Schadlingskd

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Methods using the reactions of beneficial arthropods to stimuli of prey and habitats are becoming more and more important in the biological control of pests. Especially olfactory cues, which are measurable with so called`olfactometers' are of great importance. In the present study, a modified four-armed airflow olfactometer is described by explaining these modifications. As an example, the results obtained for the predatory ladybeetle Coccinella septempunctata are explained in detail. Various odour sources caused evident differences in the reactions of the predator, especially comparing the reared beetles and the individuals collected in the field. The volatiles emitted by the odour source`bean plant + aphids' were attractive to 28 % of the reared and to 38 % of the field-collected test individuals. These values were clearly higher than in the cases of the odour source`aphids' with 18 % for both groups. About 15 % of the reared and 13 % of the field-collected coccinellids reacted to the olfactometer chamber without an odour source. On the other hand, it became obvious in test series with groups of adult beetles that group tests were not so suitable because the test individuals diverted each other so that the reactions to the odours were reduced. In the case of the group tests, 68 % of the reared and 60 % of the field-collected individuals did not react to one of the offered odour sources. In further surveys, the most favourable pre-experiment starvation period of the tested individuals and optimal duration for a single experiment were determined. For adults of C. septempunctata, the most favourable starvation time was 6 hours and the most suitable duration of a single experiment 30 minutes. In two further experiments, it was investigated whether there were differences between males and females or between beetles of different ages. There were slight differences between males and females reacting to distinct odour sources and also in the case of coccinellids of different ages but in both cases without clear tendencies.

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Section: Discussionsupporting

confidence: 72%

A modified, four‐armed olfactometer for determining olfactory reactions of beneficial arthropods

Şengonça

Kranz

2001

Anz Schadlingskd

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“…It has been verified in various investigations that olfactory stimuli cause targeted searching behaviour not only in parasitoids ( Colazza et al., 1999) but also in predatory arthropods ( McEwen et al., 1993). Additionally, the reaction of beneficials to allelochemicals emitted by their prey ( Sengonca and Liu , 1994; Sengonca et al., 1995a), the host plants of phytophagous arthropods ( Dickens , 1999; Kranz and Sengonca , 2000) or a combination of both factors ( Sengonca et al., 1995b; Venzon et al., 1999) can also play a role in this respect. Nowadays, great attention is being given to the olfactory finding of habitats by predators ( Hattingh and Samways , 1995).…”

Section: Introductionmentioning

confidence: 99%

Attractiveness of three weed species to polyphagous predators  and their influence on aphid populations in adjacent lettuce cultivations

2002

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The utilization of olfactory responses of predators and parasitoids to the allelochemicals emitted by phytophagous arthropods and their host plants is becoming more important in biological pest control. The effects of three weed species, i. e. wormwood Artemisia vulgaris L., tansy Tanacetum vulgare L. and stinging nettle Urtica dioica L., which were planted as accompanying vegetations into a lettuce field, were examined for the predatory species Coccinella septempunctata L., Adalia bipunctata (L.), Propylea quatuordecimpunctata (L.) (Coleoptera, Coccinellidae) and Chrysoperla carnea (Steph.) (Neuroptera, Chrysopidae), as well as for aphids during the summer of 2000. The presence of weeds significantly increased the density of adults and larvae of the predators on the lettuce plants in relation to the control (lettuce field without weeds). However, the differences remained smaller for eggs and pupae. C. septempunctata tended to be the most abundant species, followed by P. quatuordecimpunctata. Remarkable differences among the attractiveness levels of the weeds in the 3 treatments were not observed. The increased populations of predators were accompanied by significantly reduced infestation rates with aphids in the treatments in relation to the control. Myzus persicae Sulzer was in general the most abundant aphid species followed by Nasonovia ribisnigri Mosley and Macrosiphum euphorbiae Thomas. The results of the present study are discussed with respect to the management of agroecosystems and the use of weeds in biological control.

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“…Laboratory studies have revealed that coccinellids use multiple cues, especially olfaction and vision, to locate prey (e.g. Hattingh & Samways, 1995;Hamilton et al, 1999;Harmon et al, 1998;Obata, 1997) and that their responsiveness to prey is influenced by intrinsic factors, especially relating to hunger, age and sex (e.g., Sengonca & Liu, 1994;Sengonca et al, 1995), and extrinsic factors, including prey species, temperature and light intensity (e.g., Ferran & Dixon, 1993;Kalushkov, 1999). Feeding experience can also affect the searching activity and prey preference of coccinellids.…”

Section: Introductionmentioning

confidence: 99%

The olfactory responses of coccinellids to aphids on plants

Raymond

Darby

Douglas

2000

Entomologia Exp Applicata

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Olfactory reactions ofCryptolaemus montrouzieri Mulsant (Col., Coccinellidae) andChrysoperla carnea (Stephens) (Neur., Chrysopidae) in relation to period of starvation

Cited by 14 publications

References 11 publications

A modified, four‐armed olfactometer for determining olfactory reactions of beneficial arthropods

A modified, four‐armed olfactometer for determining olfactory reactions of beneficial arthropods

Attractiveness of three weed species to polyphagous predators  and their influence on aphid populations in adjacent lettuce cultivations

The olfactory responses of coccinellids to aphids on plants

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Olfactory reactions ofCryptolaemus montrouzieri Mulsant (Col., Coccinellidae) andChrysoperla carnea (Stephens) (Neur., Chrysopidae) in relation to period of starvation

Cited by 14 publications

References 11 publications

A modified, four‐armed olfactometer for determining olfactory reactions of beneficial arthropods

A modified, four‐armed olfactometer for determining olfactory reactions of beneficial arthropods

Attractiveness of three weed species to polyphagous predators and their influence on aphid populations in adjacent lettuce cultivations

The olfactory responses of coccinellids to aphids on plants

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Attractiveness of three weed species to polyphagous predators  and their influence on aphid populations in adjacent lettuce cultivations