The Fitness of Mass Rearing Food on the Establishment of Chrysopa pallens in a Banker Plant System under Fluctuating Temperature Conditions

Banker plant systems can be used to sustain a reproducing population of biological control agents (BCAs) within a crop, thus providing long-term pest suppression. The founder population of natural enemies in banker plant systems is usually mass-reared on factitious hosts. Thus, a better understanding of the population fitness and pest control performance of mass-reared BCAs in the field is crucial when developing integrated pest management (IPM) strategies. In this study, we determined the fitness of the generalist predator, Chrysopa pallens (Hemiptera: Chrysopidae) ever cultured on different food sources (i.e., mass rearing food, Corcyra cephalonica eggs, and aphid food, Megoura japonica) preying on Aphis craccivora in a banker plant system in a greenhouse based on Chi’s age-stage, two-sex life table analysis method. The life tables and predation rate parameters of C. pallens were not significantly different between both treatments under fluctuating temperature conditions. Corcyracephalonica eggs did not significantly weaken the performances of C. pallens in a Vicia faba–A. craccivora banker plant system compared to aphids. In conclusion, C. cephalonica eggs can be used for the mass production of C. pallens as the founder population in a banker plant system. Moreover, linking the life table data with the predation rate is an effective strategy for evaluating mass rearing programs in establishing banker plant systems.

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Two-Sex Life Table and Predation Rate ofPropylaea japonicaThunberg (Coleoptera: Coccinellidae) Fed onMyzus persicae(Sulzer) (Homoptera: Aphididae)

Environmental Entomology ◽

10.1603/0046-225x-32.2.327 ◽

2003 ◽

Vol 32 (2) ◽

pp. 327-333 ◽

Cited By ~ 114

Author(s):

Hsin Chi ◽

Ta-Chi Yang

Keyword(s):

Life Table ◽

Predation Rate

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Temperature-based phenology model for predicting the present and future establishment and distribution of recently invasive Spodoptera frugiperda (J. E. Smith) in India

Bulletin of Entomological Research ◽

10.1017/s0007485321000882 ◽

2021 ◽

pp. 1-15

Author(s):

T. V. Prasad ◽

M. Srinivasa Rao ◽

K. V. Rao ◽

S. K. Bal ◽

Y. Muttapa ◽

...

Keyword(s):

Life Table ◽

Constant Temperature ◽

Spodoptera Frugiperda ◽

Life Table Parameters ◽

Invasive Insect ◽

Temperature Conditions ◽

Risk Indices ◽

Survival And Reproduction ◽

Temperature Ranges ◽

Phenology Model

Abstract Fall armyworm, Spodoptera frugiperda (J. E. Smith) is a polyphagous and highly destructive invasive insect pest of many crops. It was recently introduced into India and widely reported in almost all parts of India. Development of a temperature-based phenology model for predicting its rate of development and distribution will help in understanding the establishment and further spread of introduced invasive insect pests. Development, survival and reproduction parameters of S. frugiperda at six constant temperature conditions (15, 20, 25, 27, 30 and 35°C) were investigated and further validated with data generated under fluctuating temperature conditions. The estimated lower developmental threshold temperatures were 12.1°C for eggs, 11°C for larvae, 12.2°C for pupae, 15.13°C for males and 12.66°C for females. Degree-day (DD) requirements for the development of the different stages of S. frugiperda were 50, 250 and 200 DD for egg, larva and pupa, respectively. The best-fitted functions were compiled for each life stage to yield a phenology model, which was stochastically simulated to estimate the life table parameters. The developed phenology model predicted temperature ranges between 27 and 30°C as favourable for S. frugiperda development, survival and reproduction. The results revealed that maximum net reproductive rate (215.66 females/female/generation) and total fecundity (981.08 individuals/female/generation) were attained at 30°C constant temperature. The mean length of generations decreased from 74.29 days at 15°C to 38.74 days at 30°C. The maximum intrinsic rate of increase (0.138 females/female/day) and shortest doubling time (4.9 days) were also observed at 30°C. Results of simulated life table parameters showed high temperature-dependent development of S. frugiperda and complete development within all the tested constant temperature ranges (15–35°C). Simulated life table parameters for predicting risk indices of S. frugiperda in India indicated a significant increase in activity indices and establishment risk indices with a higher number of generations during future (2050 and 2070) climatic change scenarios compared to present conditions. Our results indicate that India will be highly suitable for the establishment and survival of S. frugiperda in future time periods.

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Banker plant system using Hysteroneura setariae (Thomas) (Hemiptera: Aphididae) as a non-pest prey to build up the lady beetle populations

Journal of Asia-Pacific Entomology ◽

10.1016/j.aspen.2017.02.016 ◽

2017 ◽

Vol 20 (2) ◽

pp. 437-440 ◽

Cited By ~ 1

Author(s):

Wigunda Rattanapun

Keyword(s):

Lady Beetle ◽

Plant System ◽

Banker Plant

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Nondetrimental impact of two concomitant entomopathogenic fungi on life history parameters of a generalist predator, Coccinella septempunctata (Coleoptera: Coccinellidae)

Scientific Reports ◽

10.1038/s41598-021-00037-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Muhammad Rizwan ◽

Bilal Atta ◽

Muhammad Arshad ◽

Rashad Rasool Khan ◽

Asli Dageri ◽

...

Keyword(s):

Side Effects ◽

Life Table ◽

Entomopathogenic Fungi ◽

Coccinella Septempunctata ◽

Reproductive Rate ◽

Control Treatment ◽

Generalist Predator ◽

Life Table Parameters ◽

Net Reproductive Rate ◽

Fecundity Rate

AbstractThe non-persistent impact of biocontrol agents can be revealed for pest control when associated entomopathogenic fungi (EPFs) negatively affect the natural enemies. In this assay, impacts of Beauvaria bassiana (Balsamo) Vuillemin, and Metarhizium anisopliae (Metschnikoff) Sorokin were studied for their compatibility or side effects on life table parameters of an important generalist predator, Coccinella septempunctata L. The results indicated non-significant impacts of both EPFs on life table parameters of C. septempunctata. The development time (egg-adult) was not significantly different in control (69.79 days) and EPFs treated C. septempunctata (69.35–80.07 days). Both fungi did not induce any significant changes in the fecundity, adult pre-oviposition period (APOP), total preoviposition period (TPOP), and mean generation time (T) as compared to control treatment. Similarly, no difference in fecundity rate of C. septempunctata was observed after EPFs treatment (287.7–288.5) compared to control (290.0). The highest net reproductive rate (R0) occurred in control (87.05 offspring individual−1) and M. anisopliae (86.31 offspring individual−1) as compared to B. bassiana treated beetles (76.97 offspring individual−1). The age-specific fecundity curves indicated that the C. septempunctata had a similar fecundity rate in both EPFs treatments and control. This study demonstrates no significant side effects of B. bassiana and M. anispoliae on the performance and biology of C. septempunctata. Considering the compatibility of both EPFs with C. septempunctata, their combinations can be recommended in various integrated pest management programs.

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