Larval interactions between two aphidophagous coccinellids in sweet pepper

Rocca, Margarita; Rizzo, María Estefanía; Greco, Nancy M.

doi:10.1590/0001-3765202020181163

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The effects of such interactions may either stabilize preypredator populations (Hanski, 1981) or adversely affect the performance of individual predators. The interactions among coccinellids may be intra-and inter-specific such as cannibalism and intraguild predation that can affect the development and coexistence of predator populations (Rocca et al, 2020). Intraspecific competition occurs within a species, while interspecific competition occurs between species that are competing for a limited resource (Price, 1997).…”

Section: Introductionmentioning

confidence: 99%

Intra- and inter-specific interactions between Coccinella transversalis and Cheilomenes sexmaculata in relation to prey abundance

Das,

Devee

2023

JBC

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In the present study, we investigated the feeding rate and the effect of intra- and inter-specific interactions between adults, 3rd and 4th instar larvae of the coccinellids, Coccinella transversalis and Cheilomenes sexmaculata to its conspecific and heterospecific combinations under laboratory conditions. Cannibalism and the effect of interaction were investigated using the multiplicative risk model. Aphidophagous predators and their instars were kept alone, paired with conspecifics, and heterospecifics combinations in the absence and presence of prey (aphid, Aphis gossypii). In the presence of aphids, the combined release of these predator species revealed that except for (3rd × 3rd) and (4th× 4th) intraspecific combination of both predators, the observed consumption was lower than the expected consumption. In the case of interspecific combination, the observed consumption was significantly lower than expected and it indicated the antagonistic effect of both the predators in later instars in the presence of sufficient prey population. In the absence of the prey, intra-specific cannibalism was lowest between adults of both the species and highest among C. transversalis 3rd × C. transversalis adult and C. sexmaculata 3rd × C. sexmaculata adult. The interspecific predation was highest between C. transversalis adult × C. sexmaculata 3rd instar and lowest between adults of both species. The results suggest that C. transversalis was more a successful aphid predator, being able to find aphids more quickly and consume more of them compared to C. sexmaculata. As there was less intraspecific cannibalism among C. transversalis and individual consumption is also high, it is considered to play a significant role as a biocontrol agent in aphid management.

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Section: Introductionmentioning

confidence: 99%

Intra- and inter-specific interactions between Coccinella transversalis and Cheilomenes sexmaculata in relation to prey abundance

Das,

Devee

2023

JBC

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“…In turn, different developmental stages exhibit different degrees of susceptibility to intraguild predation, being eggs, small larvae, pupae, and molting stages especially susceptible (Hodek and Evans 2012). It is known, for example, that H. axyridis exerts a strong asymmetric intraguild predation on eggs and larvae of C. sanguinea (Michaud 2002) and E. connexa (Mirande et al 2015), and Rocca et al (2017Rocca et al ( , 2019 found asymmetric intraguild predation between E. connexa and C. sanguinea, being the former the strongest intraguild predator on eggs and larvae of C. sanguinea. However, the interaction between C. quadrifasciata octodecimpustulata and the other three species is already unknown.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal cooccurrence among Neotropical native coccinellids and the exotic Harmonia axyridis

et al. 2022

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Coccinellids are important biological control agent and aphid predators in horticultural crops around the world. Neotropical Cycloneda sanguinea, Eriopis connexa and Coleomegilla quadrifasciata octodecimpustulata, and the exotic Harmonia axyridis (all Coleoptera: Coccinellidae), are predators that mainly feeds on aphids. In this work we described the abundance of these coccinellid species and their spatial and temporal cooccurrence in agroecological eggplant crop of Argentina. We also estimate the intensity and symmetry of the intraguild predation between C. quadrifasciata octodecimpustulata and the other species in laboratory experiments. Both temporal and spatial segregation was observed, and H. axyridis was the strongest intraguild predator in the interaction with C. quadrifasciata octodecimpustulata, and this latter was the strongest intraguild predator in interaction with C. sanguinea and E. connexa. In this context, native coccinellid species would be vulnerable to the exotic and invasive H. axyridis; however, the lack of cooccurrence of this species with the native ones, under conditions of low density of extra-guild prey would indicate that spatial segregation could be the mechanism by which these species coexist in the eggplant crop.

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Effect of Spatiotemporal Association and Trophic Interactions Between Aphidophagous Coccinellids Toward Aphid Control

Rocca

Lucas

Greco

2021

Environmental Entomology

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Predator diversity in a system can have different results on the biological control of pests. Positive results can arise if natural enemies have niche complementarity, whereas negative effects can occur when one enemy interferes with heterospecifics—e.g., via intraguild predation—resulting in weaker pest suppression. Nevertheless, a coexistence is possible if enemies use the resource differentially leading to resource partitioning, and/or if the intraguild prey has some competitive advantage over the intraguild predator—i.e., is better at exploiting the shared resource or exhibits avoidance behavior. In this study, we conducted a series of field-sampling and semifield experiments to elucidate the spatiotemporal association patterns of the coccinellids Eriopis connexa (Germar) and Cycloneda sanguinea L. (Coleoptera: Coccinellidae) and determine how the trophic interactions between them could affect the biological control of aphids. We found that both coccinellid species coexist in sweet-pepper crops over time, and this coexistence could be explained by a temporal niche complementarity. Despite cooccurring spatially, they were segregated at the leaf level, which segregation can be explained by an avoidance behavior to prevent negative trophic interactions, such as cannibalism and intraguild predation. Under semifield conditions, the possible negative trophic interactions did not affect the control of aphids when both species were present, but the density of C. sanguinea was reduced at the end of the experiment. These results suggest that biological control strategies that include both species would be positive for the control of aphids on the basis of these considerations.

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Larval interactions between two aphidophagous coccinellids in sweet pepper

Cited by 5 publications

References 32 publications

Intra- and inter-specific interactions between <i>Coccinella transversalis</i> and <i>Cheilomenes sexmaculata</i> in relation to prey abundance

Intra- and inter-specific interactions between <i>Coccinella transversalis</i> and <i>Cheilomenes sexmaculata</i> in relation to prey abundance

Spatial and temporal cooccurrence among Neotropical native coccinellids and the exotic Harmonia axyridis

Effect of Spatiotemporal Association and Trophic Interactions Between Aphidophagous Coccinellids Toward Aphid Control

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