The functional and numerical responses ofTrissolcus basalis(Hymenoptera: Platygastridae) parasitizingNezara viridula(Hemiptera: Pentatomidae) eggs in the field
| Autor: | Jorge E. Rabinovich, Gerardo Gustavo Liljesthröm, María Fernanda Cingolani |
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| Rok vydání: | 2013 |
| Předmět: |
HOST
Numerical response Wasps Argentina Functional response Parasitism Hymenoptera Biology Models Biological Host-Parasite Interactions Parasitoid Heteroptera TRISSOLCUS BASALIS COEFFICIENT OF INTERFERENCE Ciencias Biológicas Sex Factors Animal science NUMERICAL RESPONSE Platygastridae Botany Animals Sex Ratio SEX RATIO Ovum Population Density PARASITOID NEZARA VIRIDULA General Medicine Ecología Pentatomidae biology.organism_classification PRE-ADULT SURVIVORSHIP Nezara viridula Insect Science FUNCTIONAL RESPONSE Agronomy and Crop Science CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Bulletin of Entomological Research. 103:441-450 |
| ISSN: | 1475-2670 0007-4853 |
| DOI: | 10.1017/s0007485313000023 |
| Popis: | Trissolcus basalis has been used as a biological control agent of its main host, Nezara viridula, in many countries. However, estimations of its functional and numerical responses in the field are lacking. We estimated the density of N. viridula eggs, the proportion of parasitized N. viridula eggs, and the number of T. basalis adults/trap in the field. We transformed relative parasitoid density to an absolute density, and estimated the parasitoid’s attack rate, a, and the mutual interference parameter, m, in two ways: following Arditi & Akçakaya (1990) and using the Holling–Hassell–Varley model with two iterative techniques. The attack rate estimated by both methods were a= 1.097 and a= 0.767, respectively. Parameter m varied less between methods: m= 0.563 and m= 0.586, respectively, and when used to calculate the number of parasitized N. viridula eggs per m2 , differences with the observed values were not significant. The numerical response of T. basalis was affected by the sex allocation of their progeny and the proportion of adult parasitoids trapped decreased with field parasitoid population density. Theoretical models show that 0 |
| Databáze: | OpenAIRE |
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