scholarly journals A comparison of the responses of two tropical specialist herbivores to host plant patch size

Oecologia ◽  
1986 ◽  
Vol 68 (4) ◽  
pp. 580-584 ◽  
Author(s):  
Catherine E. Bach
Keyword(s):  
Host Plant ◽  
Patch Size ◽  
Specialist Herbivores

scholarly journals Impact of Host Plant Connectivity, Crop Border and Patch Size on Adult Colorado Potato Beetle Retention

PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e95717 ◽  
Author(s):  
Gilles Boiteau ◽  
Charles Vincent ◽  
Tracy C. Leskey ◽  
Bruce G. Colpitts ◽  
Pamela MacKinley ◽  
...  
Keyword(s):  
Host Plant ◽  
Colorado Potato Beetle ◽  
Patch Size ◽  
Potato Beetle

scholarly journals Effect of patch size of the exotic host plant Calotropis procera (Apocynaceae) on herbivory

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Geraldo Wilson Fernandes ◽  
Maria Fernanda Vicente Rodrigues-Menelau ◽  
Jarcilene Silva de Almeida ◽  
Samuel Novais
Keyword(s):  
Host Plant ◽  
Patch Size ◽  
Calotropis Procera ◽  
Exotic Host

scholarly journals The tritrophic system hyptis suaveolens (Lamiaceae) - agromyzid leafminers (Diptera: Agromyzidae) - parasitoids (Hymenoptera): effects of herbivore density, host plant patch size, and habitat complexity on parasitism rate

2009 ◽  
Vol 52 (3) ◽  
pp. 573-580 ◽  
Author(s):  
Jarbas Marcal de Queiroz ◽  
Maria Alice Garcia
Keyword(s):  
Host Plant ◽  
Habitat Complexity ◽  
Patch Size ◽  
Host Density ◽  
Habitat Diversity ◽  
Parasitism Rate ◽  
Tritrophic System ◽  
Hyptis Suaveolens ◽  
Plant Densities ◽  
Managed Ecosystems

In this study a tritrophic system was evaluated to measure the contributions of the insect host density and its host plant concentration in simple and diversified habitat on the rate of parasitism. The system was composed of the plant Hyptis suaveolens, two species of agromyzid leafminers, and three morphospecies of parasitoids. The parasitism rate, patch size, and habitat complexity were found to be interdependent. If only the habitat complexity or patch size was take into account the differences in parasitism rate are not significant, although habitat diversity seemed to contribute more than the host plant concentration to increase the parasitism rate. The leaves or plants with different number of mines were equally attacked by the parasitoids. The results were representative of what happened to the leafminers at different host plant densities under the homogeneous and heterogeneous habitat condition. This work could help to reinforce the idea of the importance of the plant diversity for enhancing the biological control of the pests by the parasitoids in the managed ecosystems.

scholarly journals Role of Saponins in Plant Defense Against Specialist Herbivores

Molecules ◽  
2019 ◽  
Vol 24 (11) ◽  
pp. 2067 ◽  
Author(s):  
Mubasher Hussain ◽  
Biswojit Debnath ◽  
Muhammad Qasim ◽  
Bamisope Steve Bamisile ◽  
Waqar Islam ◽  
...  
Keyword(s):  
Plant Defense ◽  
Host Plant ◽  
Larval Survival ◽  
Bioactive Molecules ◽  
Plant Metabolites ◽  
Specialist Herbivore ◽  
Triterpenoid Saponins ◽  
Secondary Plant Metabolites ◽  
Specialist Herbivores

The diamondback moth (DBM), Plutella xylostella (Lepidoptera: Plutellidae) is a very destructive crucifer-specialized pest that has resulted in significant crop losses worldwide. DBM is well attracted to glucosinolates (which act as fingerprints and essential for herbivores in host plant recognition) containing crucifers such as wintercress, Barbarea vulgaris (Brassicaceae) despite poor larval survival on it due to high-to-low concentration of saponins and generally to other plants in the genus Barbarea. B. vulgaris build up resistance against DBM and other herbivorous insects using glucosinulates which are used in plant defense. Aside glucosinolates, Barbarea genus also contains triterpenoid saponins, which are toxic to insects and act as feeding deterrents for plant specialist herbivores (such as DBM). Previous studies have found interesting relationship between the host plant and secondary metabolite contents, which indicate that attraction or resistance to specialist herbivore DBM, is due to higher concentrations of glucosinolates and saponins in younger leaves in contrast to the older leaves of Barbarea genus. As a response to this phenomenon, herbivores as DBM has developed a strategy of defense against these plant biochemicals. Because there is a lack of full knowledge in understanding bioactive molecules (such as saponins) role in plant defense against plant herbivores. Thus, in this review, we discuss the role of secondary plant metabolites in plant defense mechanisms against the specialist herbivores. In the future, trials by plant breeders could aim at transferring these bioactive molecules against herbivore to cash crops.

The role of pre- and post- alighting detection mechanisms in the responses to patch size by specialist herbivores

Oikos ◽  
2005 ◽  
Vol 109 (3) ◽  
pp. 435-446 ◽  
Author(s):  
Tibor Bukovinszky ◽  
Roel P. J. Potting ◽  
Yann Clough ◽  
Joop C. van Lenteren ◽  
Louise E. M. Vet
Keyword(s):  
Patch Size ◽  
Specialist Herbivores ◽  
Detection Mechanisms
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