Influence of intraguild predation among generalist insect predators on the suppression of an herbivore population

Oecologia ◽  
1993 ◽  
Vol 96 (3) ◽  
pp. 439-449 ◽  
Author(s):  
Jay A. Rosenheim ◽  
Lawrence R. Wilhoit ◽  
Christine A. Armer
Keyword(s):  
Intraguild Predation ◽  
Insect Predators ◽  
Generalist Insect

Aphicidal effects of terpenoids present in Citrus limon on Macrosiphum roseiformis and two generalist insect predators

2017 ◽  
Vol 20 (4) ◽  
pp. 1087-1095 ◽  
Author(s):  
Garima Gupta ◽  
Uday Agarwal ◽  
Harneet Kaur ◽  
Neelima R. Kumar ◽  
Pawan Gupta
Keyword(s):  
Citrus Limon ◽  
Insect Predators ◽  
Generalist Insect

scholarly journals Alternative prey influence the predation of mosquito larvae by three water bug species (Heteroptera: Nepidae)

2020 ◽  
Vol 20 (4) ◽  
pp. 173-184
Author(s):  
Nabaneeta Saha ◽  
Malini Kundu ◽  
Goutam K. Saha ◽  
Gautam Aditya
Keyword(s):  
Biological Control ◽  
Labeo Rohita ◽  
Apparent Competition ◽  
Conservation Biological Control ◽  
Mosquito Larvae ◽  
Alternative Prey ◽  
Chironomid Larvae ◽  
Insect Predators ◽  
Generalist Insect ◽  
Water Bugs

AbstractThe indirect interactions among multiple prey sharing a common predator characterize apparent competition. In conservation biological control involving mosquitoes and controphic prey against generalist insect predators, apparent competition may be a crucial factor determining the extent of success. The possible influence of apparent competition on mosquito prey consumption by three water bugs (Heteroptera: Nepidae): Ranatra elongata, Ranatra filiformis, and Laccotrephes griseus was assessed under laboratory conditions. Tadpoles (Duttaphrynus melanostictus), chironomid larvae, snails (Racesina luteola) and fish fingerlings (Labeo rohita) were considered as alternative prey under two prey or multi prey conditions against instar IV larvae of Culex quinquefasciatus as target prey. Under two prey conditions all the predators exhibited a preference (significant Manly’s α) for mosquito larvae, against fish fingerlings by R. filiformis. In the presence of multiple prey, mosquito larvae were selected by the predators. Using the ratio of mosquito selectivity in two prey and multi-prey conditions as a measure of apparent competition, chironomid larvae had greatest effect in suppressing mosquito selectivity for R. elongata, and fish fingerlings for R. filiformis and L. griseus. It seems that the prey preference of R. elongata, R. filiformis and L. griseus may differentially evoke apparent competition among the prey. In the aquatic community where these predators and prey coexist, mosquito larvae may benefit from apparent competition that reduces their vulnerability to predators. The identity of the alternative prey appears to be an important factor for shielding the vulnerability of mosquito prey to the generalist insect predators.

scholarly journals Revealing the Diet of Generalist Insect Predators in Strawberry Fields: Not Only Pests, But Other Predators Beware

2020 ◽  
Vol 49 (6) ◽  
pp. 1300-1306
Author(s):  
K L Krey ◽  
W R Cooper ◽  
J M Renkema
Keyword(s):  
Dna Sequences ◽  
Generalist Predators ◽  
Dietary Analysis ◽  
Invertebrate Predators ◽  
Insect Predators ◽  
Pest Suppression ◽  
Generalist Insect ◽  
Next Generation Sequencing Ngs ◽  
Organically Managed ◽  
Control Service

Abstract Generalist invertebrate predators contribute to pest management in agriculture, providing an important ecosystem service, particularly in organically managed fields. DNA-based methods to study food webs and feeding interactions in unrestricted field conditions have transformed dietary analysis of generalist predators. In this study, we used MiSeq next-generation sequencing (NGS) technology and universal arthropod primers to investigate the diet of several generalist insect predators collected in commercial organic Florida strawberry fields from November 2017 to March 2018. Of 12 predator insect taxa, Geocoris spp. (Say) (Hemiptera: Geocoridae) was the most abundant early in the growing season (November) and was collected consistently until the end of the season (early March). DNA sequences from 105 predator samples were matched to 44 arthropod families, and of these, 17 were categorized as pest families, 10 as nonpest or nonpredator families, and 17 as predator families. Drosophilidae was the most detected pest family, and Dolichopodidae was the most detected predator family. Prey diversity differed among the predators. Chrysoperla spp. (Neuroptera: Chrysopidae) consumed more prey earlier in the season than did other predators, whereas the other predators consumed a greater diversity of other predators regardless of month. Our results showed a high amount of intraguild predation, but also that predators are contributing to pest suppression in organic strawberries and providing an important biological control service in Florida organic strawberries.

scholarly journals Influence of competition and intraguild predation between two candidate biocontrol parasitoids on their potential impact against Harrisia cactus mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
María B. Aguirre ◽  
Octavio A. Bruzzone ◽  
Serguei V. Triapitsyn ◽  
Hilda Diaz-Soltero ◽  
Stephen D. Hight ◽  
...  
Keyword(s):  
Intraguild Predation ◽  
Interference Competition ◽  
Biocontrol Agents ◽  
Parasitoid Species ◽  
Temporal Window ◽  
Response Models ◽  
Potential Impact ◽  
Functional Response Models ◽  
Fully Bayesian ◽  
Release Strategy

AbstractWhen two or more parasitoid species, particularly candidates for biocontrol, share the same target in the same temporal window, a complex of behaviors can occur among them. We studied the type of interactions (competition and intraguild predation) that existed between the nymphal parasitoids Anagyrus cachamai and A. lapachosus (Hymenoptera: Encyrtidae), two candidate neoclassical biocontrol agents against the Puerto Rican cactus pest mealybug, Hypogeococcus sp. (Hemiptera: Pseudococcidae). The surrogate native congener host in Argentina, the cactus mealybug Hypogeococcus sp., was studied to predict which species should be released; in the case that both should be released, in which order, and their potential impact on host suppression. In the laboratory we conducted experiments where different densities of the host mealybug were exposed to naive females of A. cachamai and A. lapachosus sequentially in both directions. Experiments were analyzed by combining a series of competitive behavioral and functional response models. A fully Bayesian approach was used to select the best explaining models and calculate their parameters. Intraguild predation existed between A. cachamai, the species that had the greatest ability to exploit the resource, and A. lapachosus, the strongest species in the interference competition. The role that intraguild predation played in suppression of Hypogeococcus sp. indicated that a multiple release strategy for the two biocontrol agents would produce better control than a single release; as for the release order, A. lapachosus should be released first.

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