Differential Host-Finding Abilities by a Weed Biocontrol Insect Create Within-Patch Spatial Refuges for Nontarget Plants

2014 ◽  
Vol 43 (5) ◽  
pp. 1333-1344 ◽  
Author(s):  
Haley A. Catton ◽  
Robert G. Lalonde ◽  
Rosemarie A. De Clerck-Floate
Keyword(s):  
Host Finding ◽  
Weed Biocontrol ◽  
Differential Host

Use of odor by host-finding insects: the role of real-time odor environment and odor mixing degree

Chemoecology ◽  
2021 ◽  
Author(s):  
Xinliang Shao ◽  
Ke Cheng ◽  
Zhengwei Wang ◽  
Qin Zhang ◽  
Xitian Yang
Keyword(s):  
Real Time ◽  
Host Finding

scholarly journals Trissolcus japonicus (Hymenoptera: Scelionidae) Causes Low Levels of Parasitism in Three North American Pentatomids Under Field Conditions

2019 ◽  
Vol 19 (4) ◽  
Author(s):  
Joshua M Milnes ◽  
Elizabeth H Beers
Keyword(s):  
North American ◽  
Native Species ◽  
Classical Biological Control ◽  
The United States ◽  
Host Finding ◽  
Pest Species ◽  
Case Scenario ◽  
Worst Case ◽  
Egg Masses ◽  
Trissolcus Japonicus

Abstract Trissolcus japonicus (Ashmead), an Asian parasitoid of Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), was first detected in North America in 2014. Although testing in quarantine facilities as a candidate for classical biological control is ongoing, adventive populations have appeared in multiple sites in the United States, Canada, and Europe. Extensive laboratory testing of T. japonicus against other North American pentatomids and H. halys has revealed a higher rate of parasitism of H. halys, but not complete host specificity. However, laboratory tests are necessarily artificial, in which many host finding and acceptance cues may be circumvented. We offered sentinel egg masses of three native pentatomid (Hemiptera: Pentatomidae) pest species (Chinavia hilaris (Say), Euschistus conspersus Uhler, and Chlorochroa ligata (Say)) in a field paired-host assay in an area with a well-established adventive population of T. japonicus near Vancouver, WA. Overall, 67% of the H. halys egg masses were parasitized by T. japonicus during the 2-yr study. Despite the ‘worst case’ scenario for a field test (close proximity of the paired egg masses), the rate of parasitism (% eggs producing adult wasps) on all three native species was significantly less (0.4–8%) than that on H. halys eggs (77%). The levels of successful parasitism of T. japonicus of the three species are C. hilaris > E. conspersus > C. ligata. The potential impact of T. japonicus on these pentatomids is probably minimal.

scholarly journals Infrared radiation from hot cones on cool conifers attracts seed-feeding insects

2008 ◽  
Vol 276 (1657) ◽  
pp. 649-655 ◽  
Author(s):  
Stephen Takács ◽  
Hannah Bottomley ◽  
Iisak Andreller ◽  
Tracy Zaradnik ◽  
Joseph Schwarz ◽  
...  
Keyword(s):  
Long Range ◽  
Infrared Radiation ◽  
Host Finding ◽  
Mast Seeding ◽  
Experimental Ir ◽  
Ir Radiation ◽  
Leptoglossus Occidentalis ◽  
Conifer Seed

Foraging animals use diverse cues to locate resources. Common foraging cues have visual, auditory, olfactory, tactile or gustatory characteristics. Here, we show a foraging herbivore using infrared (IR) radiation from living plants as a host-finding cue. We present data revealing that (i) conifer cones are warmer and emit more near-, mid- and long-range IR radiation than needles, (ii) cone-feeding western conifer seed bugs, Leptoglossus occidentalis (Hemiptera: Coreidae), possess IR receptive organs and orient towards experimental IR cues, and (iii) occlusion of the insects' IR receptors impairs IR perception. The conifers' cost of attracting cone-feeding insects may be offset by occasional mast seeding resulting in cone crops too large to be effectively exploited by herbivores.

Nontarget herbivory by a weed biocontrol insect is limited to spillover, reducing the chance of population-level impacts

2015 ◽  
Vol 25 (2) ◽  
pp. 517-530 ◽  
Author(s):  
Haley A. Catton ◽  
Robert G. Lalonde ◽  
Rosemarie A. De Clerck-Floate
Keyword(s):  
Population Level ◽  
Weed Biocontrol

Differentiation of innate but not learnt responses to host-habitat odours contributes to rapid host finding in a parasitoid genotype

2008 ◽  
Vol 33 (3) ◽  
pp. 226-232 ◽  
Author(s):  
RAQUEL PÉREZ-MALUF ◽  
HALITIANA RAFALIMANANA ◽  
ERICK CAMPAN ◽  
FRÉDERIC FLEURY ◽  
LAURE KAISER
Keyword(s):  
Host Finding ◽  
Host Habitat

Host finding by aphids in the field.

1961 ◽  
Vol 49 (1) ◽  
pp. 1-21 ◽  
Author(s):  
J. S. KENNEDY ◽  
C. O. BOOTH ◽  
W. J. S. KERSHAW
Keyword(s):  
Host Finding
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