Volatile-mediated foraging behaviour of three parasitoid species under conditions of dual insect herbivore attack

2016 ◽  
Vol 111 ◽  
pp. 197-206 ◽  
Author(s):  
Camille Ponzio ◽  
Pasquale Cascone ◽  
Antonino Cusumano ◽  
Berhane T. Weldegergis ◽  
Nina E. Fatouros ◽  
...  
Keyword(s):  
Foraging Behaviour ◽  
Insect Herbivore ◽  
Parasitoid Species ◽  
Herbivore Attack

scholarly journals Insect Elicitors and Exposure to Green Leafy Volatiles Differentially Upregulate Major Octadecanoids and Transcripts of 12-Oxo Phytodienoic Acid Reductases in Zea mays

2007 ◽  
Vol 20 (6) ◽  
pp. 707-716 ◽  
Author(s):  
Jürgen Engelberth ◽  
Irmgard Seidl-Adams ◽  
Jack C. Schultz ◽  
James H. Tumlinson
Keyword(s):  
Zea Mays ◽  
Time Course ◽  
Mechanical Damage ◽  
Insect Herbivore ◽  
Plant Insect Interactions ◽  
Volatile Organic ◽  
Herbivore Attack ◽  
Quantitative Changes ◽  
Insect Interactions ◽  
Defensive Measures

The induction of jasmonic acid (JA) is one of the major signaling events in plants in response to insect herbivore damage and leads to the activation of direct and indirect defensive measures. Green leafy volatiles, which constitute a major portion of volatile organic compounds, often are released in response to insect herbivore attack and have been shown to significantly activate JA production in exposed corn (Zea mays) seedlings, thereby priming these plants specifically against subsequent herbivore attack. To explore the factors determining the specificity of the octadecanoid signaling pathway in corn, we analyzed qualitative and quantitative changes in major octadecanoids. The time course and the amount of induced JA and 12-oxophytodienoic acid levels in corn seedlings were strikingly different after wounding, application of caterpillar regurgitant, or treatment with cis-3-hexenyl acetate (Z-3-6:AC). Exposure to Z-3-6:AC induced accumulation of transcripts encoded by three putative 12-oxophytodienoate10,11-re-ductase genes (ZmOPR1/2, ZmOPR5, and ZmOPR8). Although changes in ZmOPR5 RNAs were detected only after exposure to Z-3-6:AC, ZmOPR1/2 RNAs and ZmOPR8 RNAs also were abundant after treatment with crude regurgitant elicitor or mechanical damage. The physiological implications of these findings in the context of plant-insect interactions are discussed.

scholarly journals Airborne signals prime plants against insect herbivore attack

2004 ◽  
Vol 101 (6) ◽  
pp. 1781-1785 ◽  
Author(s):  
J. Engelberth ◽  
H. T. Alborn ◽  
E. A. Schmelz ◽  
J. H. Tumlinson
Keyword(s):  
Insect Herbivore ◽  
Herbivore Attack

Influence of intrinsic variation on foraging behaviour of adult female Australian fur seals

2015 ◽  
Vol 526 ◽  
pp. 227-239 ◽  
Author(s):  
AJ Hoskins ◽  
DP Costa ◽  
KE Wheatley ◽  
JR Gibbens ◽  
JPY Arnould
Keyword(s):  
Adult Female ◽  
Foraging Behaviour ◽  
Fur Seals

Mechanisms for sex-based segregation in foraging behaviour by a polygynous marine carnivore

2019 ◽  
Vol 624 ◽  
pp. 213-226 ◽  
Author(s):  
M Salton ◽  
R Kirkwood ◽  
D Slip ◽  
R Harcourt
Keyword(s):  
Foraging Behaviour

The scale insect Coccus pseudomagnoliarum (Kuwana) (Hemiptera: Coccomorpha: Coccidae) on citrus in Greece

2020 ◽  
Vol 13 (2) ◽  
pp. 93-97
Author(s):  
G.J. Stathas ◽  
Ch.F. Karipidis
Keyword(s):  
Citrus Sinensis ◽  
Maximum Rate ◽  
Scale Insect ◽  
Instar Nymph ◽  
Summer Period ◽  
Parasitoid Species ◽  
Parthenogenetic Species

SummaryPhenology and parasitism of the scale insect, Coccus pseudomagnoliarum (Kuwana) (Hemiptera: Coccomorpha: Coccidae), infesting Citrus sinensis (Rutaceae), were studied in Papagou area, in northeastern Athens, from June 2015 to June 2017. Coccus pseudomagnoliarum is a univoltine, viviparous, parthenogenetic species. It overwintered as settled 1st instar nymph on the shoots of the trees. The 2nd instar nymphs appeared between the beginning of April and the end of May, and the mature females were recorded from the beginning of May until the middle of June. The crawlers appeared between the middle of May and the middle of June and the 1st instar nymphs settled on the shoots at the end of May, where they remained during the whole summer period, winter, until the beginning of April next year. Parasitism of the scale was recorded between the beginning of May and the middle of May and reached a maximum rate of 35%. The recorded parasitoid species were Coccophagus shillongensis Hayat and Singh (Hymenoptera: Aphelinidae), Coccophagus spp. and Metaphycus dispar (Mercet) (Hymenoptera: Encyrtidae).

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