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Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley

Predation is one of the significant biotic mortality factors reducing the insect pest population as functional response and the numerical response of the predator are the key factor regulating the population dynamics of predator prey species. This study is aimed to evaluate the functional response o...

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Autores principales: Kumari, Sweetee, Suroshe, Sachin S., Kumar, Dinesh, Budhlakoti, Neeraj, Yana, Venkanna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8241695/
https://www.ncbi.nlm.nih.gov/pubmed/34220234
http://dx.doi.org/10.1016/j.sjbs.2021.03.051
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author Kumari, Sweetee
Suroshe, Sachin S.
Kumar, Dinesh
Budhlakoti, Neeraj
Yana, Venkanna
author_facet Kumari, Sweetee
Suroshe, Sachin S.
Kumar, Dinesh
Budhlakoti, Neeraj
Yana, Venkanna
author_sort Kumari, Sweetee
collection PubMed
description Predation is one of the significant biotic mortality factors reducing the insect pest population as functional response and the numerical response of the predator are the key factor regulating the population dynamics of predator prey species. This study is aimed to evaluate the functional response of all the developmental stages of Scymnus coccivora Ayyar (Coleoptera: Coccinellidae) against the different densities of cotton mealybug, Phenacoccus solenopsis (Tinsley) (Hemiptera: Pseudococcidae) and the numerical response of female predator. Experiments were carried out in controlled environment laboratory conditions at 25 ± 1 °C temperature, 60 ± 5% relative humidity and photoperiod of 16 h. Number of eggs consumed, number of eggs laid and the Efficiency of Conversion of Ingested food (ECI) were recorded daily. Results from the study revealed that all the developmental stages of S. coccivora exhibited a Type II response. Different parameters such as attack rate (a’), handling time (T(h)) and the maximum rate of predation were estimated using Roger’s random attack equation and Holling Disc equation in which Rogers random attack equation was found best fit. Female has shown the highest attack rate (a’) followed by IV(th) instar grub, male, III(rd), II(nd) and I(st) instar grub. With low handling time, IV(th) instar grub has shown maximum predation rate of 76.40 per day followed by female (75.86), male (58.79), III(rd) (22.84), II(nd) (19.65) and I(st) instar grub (15.39). The numerical response increase was curvilinearly related to different prey densities with the highest number of eggs (11.8 ± 3.44) produced at highest prey density (160). The Efficiency of Conversion of Ingested food (ECI) was highest (64.49 ± 8.03) at prey density of 10. Understanding the factors that lead to variation in functional response of predator in natural population will advance our understanding of the effects of predation on individual and the effectiveness of coccinellid predators as biocontrol agent against cotton mealybug.
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spelling pubmed-82416952021-07-02 Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley Kumari, Sweetee Suroshe, Sachin S. Kumar, Dinesh Budhlakoti, Neeraj Yana, Venkanna Saudi J Biol Sci Original Article Predation is one of the significant biotic mortality factors reducing the insect pest population as functional response and the numerical response of the predator are the key factor regulating the population dynamics of predator prey species. This study is aimed to evaluate the functional response of all the developmental stages of Scymnus coccivora Ayyar (Coleoptera: Coccinellidae) against the different densities of cotton mealybug, Phenacoccus solenopsis (Tinsley) (Hemiptera: Pseudococcidae) and the numerical response of female predator. Experiments were carried out in controlled environment laboratory conditions at 25 ± 1 °C temperature, 60 ± 5% relative humidity and photoperiod of 16 h. Number of eggs consumed, number of eggs laid and the Efficiency of Conversion of Ingested food (ECI) were recorded daily. Results from the study revealed that all the developmental stages of S. coccivora exhibited a Type II response. Different parameters such as attack rate (a’), handling time (T(h)) and the maximum rate of predation were estimated using Roger’s random attack equation and Holling Disc equation in which Rogers random attack equation was found best fit. Female has shown the highest attack rate (a’) followed by IV(th) instar grub, male, III(rd), II(nd) and I(st) instar grub. With low handling time, IV(th) instar grub has shown maximum predation rate of 76.40 per day followed by female (75.86), male (58.79), III(rd) (22.84), II(nd) (19.65) and I(st) instar grub (15.39). The numerical response increase was curvilinearly related to different prey densities with the highest number of eggs (11.8 ± 3.44) produced at highest prey density (160). The Efficiency of Conversion of Ingested food (ECI) was highest (64.49 ± 8.03) at prey density of 10. Understanding the factors that lead to variation in functional response of predator in natural population will advance our understanding of the effects of predation on individual and the effectiveness of coccinellid predators as biocontrol agent against cotton mealybug. Elsevier 2021-07 2021-03-27 /pmc/articles/PMC8241695/ /pubmed/34220234 http://dx.doi.org/10.1016/j.sjbs.2021.03.051 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Article
Kumari, Sweetee
Suroshe, Sachin S.
Kumar, Dinesh
Budhlakoti, Neeraj
Yana, Venkanna
Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley
title Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley
title_full Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley
title_fullStr Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley
title_full_unstemmed Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley
title_short Foraging behaviour of Scymnus coccivora Ayyar against cotton mealybug Phenacoccus solenopsis Tinsley
title_sort foraging behaviour of scymnus coccivora ayyar against cotton mealybug phenacoccus solenopsis tinsley
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8241695/
https://www.ncbi.nlm.nih.gov/pubmed/34220234
http://dx.doi.org/10.1016/j.sjbs.2021.03.051
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