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Host-plant patches as islands: Effects of patch size, patch extinction and seasonality of a herbaceous tropical legume (Crotalaria pallida Ait.) On a pod borer (Etiella zinckenella (Treit.)) and its parasitoids*

Published online by Cambridge University Press:  19 September 2011

Alejandro E. Segarra-Carmona  and
Pedro Barbosa
Alejandro E. Segarra-Carmona
Affiliation:
Department of Entomology, University of Maryland, College Park, Maryland 20472, USA
Pedro Barbosa
Affiliation:
Department of Entomology, University of Maryland, College Park, Maryland 20472, USA
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Abstract

Surveys were conducted in 1981, 1983 and 1984 across the island of Puerto Rico to determine the effects of patch characteristics of the tropical herbaceous legume, Crotalaria pallida Ait. on the herbivore and its parasitoids. The mean number of flower racemes per plant and mature pods per raceme varied from year to year and appeared to be influenced by rainfall patterns, but were independent of patch size or plant density. Low larval parasitism was also observed during dry seasons. Proportion of plant patches colonized by Etiella zinckenella was smallest during dry seasons. Local extinction of C. pallida patches was found commonly, with a 77.4% extinction rate during a 6-month period. Patch extinction, which was caused mainly by human activity, was independent of patch size.

Pods of C. pallida within patches were inspected for lima bean pod borer, E. zinckenella (Lepidoptera: Phycitidae) injury. The number of pods bored per mature raceme, and the per cent of bored pods were positively correlated with the number of host-plants per patch and the (surface) area of the patch. No correlation was found between per cent parasitism and pod borer larval density. However, per cent parasitism was influenced directly by C. pallida plant density and patch surface area. Given the transient nature of C. pallida patches and the changes that occur over a season, these positive responses of parasitoids to plant density and patch surface area are important components for their successful exploitation of larval hosts.

Résumé

Des enquêtes menées en 1981, 1983 et 1984 sur toute l'étendue de l'Ile de Puerto Rico visant à déterminer les caractéristiques des parcelles de la légumineuse Crotalaria pallida Ait et les effets qu'elle pourrait avoir sur les ravageursde cette plante et leurs parasitoïdes. Le nombre moyen de grappes et celui des gousses parvenant à maturité par plant varie suivant les années et semble dépendre des variations pluviométriques, alors que les dimensions des parcelles et la densité des plants par parcelle ne semblent pas exercer d'effet. Le parasitisme larvaire pendant les saisons sèches est également bas. La proportion de parcelles de plants infestées par Etiella zinckenella était également basse au coins des saisons sèches. Des extinctions de C. pallida dans les parcelles atteignant 77.4% en 6 mois out été en général notées. Ces disparitions dans les parcelles dues aux activités humaines sont indépendantes des dimensions des parcelles. Des enquêtes ont été effectuées sur les dégâts causes par le foreur de gousses du haricot, E. zinckenella (Lepidoptera: Phycitidae). II a été établi une corrélation positive entre le nombre de gousses forées par grappe murie, le pourcentage de gousses forées avec le nombre de plantes hôtes par parcelle de même qu'avec la superficie de la parcelle considérée. Aucune relation n'a été observée entre le pourcentage de parasitisme et la densité larvaire du foreur; cependant une influence directe de la densité deC. pallida et la surface de la parcelle considérée sur le degré de parasitisme est observée. Considérant la nature éphémère des parcelles de distribution de C.pallida et les changements qui surviennent au cours d'une saison, les relations positives observées entre parasitoïdes, densité de plants et la superficie plantée sont des composantes importantes pour une utilisation judicieuse des hôtes de larves.

Keywords

Patch dynamicspatch extinctionscasonalityEtiella zinckenellaCrotalaria pallidatri-trophic interactions
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 13 , Issue 5 , October 1992 , pp. 709 - 718
Copyright
Copyright © ICIPE 1992

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References

REFERENCES

Alticri, M. A. and Whitcomb, W. H. (1978/1979) Manipulations of insect populations through seasonal disturbance of weed communities. Prot. Ecol. 1, 185–202.Google Scholar
Armstrong, A.M. (1988) Light trap study of Heliolhis virescens (Fab.) and Etiella zinekenella (Treat.) on pigeon pea Cajanus cajan. J. Agric. Univ. Puerto Rico 72, 557–563.Google Scholar
Bach, C. E. (1984) Plant spatial pattern and herbivore population dynamics: Plant factors affecting the movement patterns of a tropical cucurbit specialist. Ecology 65, 175–190.CrossRefGoogle Scholar
Barbosa, P. and Wagner, M. (1989) Introduction to Forest and Shade Tree Entomology. Academic Press, New York, New York.CrossRefGoogle Scholar
Beddington, J. R., Frce, C. A. and Lawton, J. H. (1978) Characteristics of successful natural enemies in models of biological control of insect pests. Nature 273, 513–519.CrossRefGoogle ScholarPubMed
Blau, W. S. (1980) The effect of environmental disturbance on a tropical butterfly population. Ecology 61, 1005–1012.CrossRefGoogle Scholar
Blau, W. S. (1981) Latitudinal variation in the life histories of insects occupying disturbed habitats: A case study. In Insect Life History Patterns (Edited by Denno, R. F. and Dingle, H.), pp. 75–95. Springer-Verlag, New York.CrossRefGoogle Scholar
Comins, H. N. and Hassell, M. P. (1979) The dynamics of optimally foraging predators and parasitoids. J. Anim. Ecoi. 48, 335–351.CrossRefGoogle Scholar
Connell, J. H. (1978) Diversity in tropical rain forests and coral reefs. Science 199, 1302–1310.CrossRefGoogle ScholarPubMed
Connell, J. H. and Slayter, R. O. (1977) Mechanisms of succession in natural communities and their role in community stability and organization. Amer. Natur. 111, 1119–1144.CrossRefGoogle Scholar
Connor, E. F. and McCoy, E. D. (1979) The statistics and biology of the species-area relationship. Amer. Natur. 13, 791–833.CrossRefGoogle Scholar
Cook, R. M. and Hubbard, S. F. (1977) Adaptive searching strategies in insect parasites. J. Anim. Ecol. 46, 115–125.CrossRefGoogle Scholar
Dempster, J. P. (1983a) The ecology of Cinnabar moth, Tyria jacobaeae L. (Lepidoptera: Arcliidac). Adv. Ecol. Res. 12, 1–36.Google Scholar
Dempster, J. P. (1983b) The natural control of populalionsof bulterflies and moths. Biol. Rev. 58, 461–481.CrossRefGoogle Scholar
Dempster, J. P. and Pollard, E. (1981) Fluctuations in resource availability and insect populations. Oecologia 50, 412–16.CrossRefGoogle ScholarPubMed
den Boer, P. J. (1981) On the survival of populations in a heterogeneous and variable environment. Oecologia 50, 39–53.CrossRefGoogle Scholar
Denno, R. F. (1983) Tracking host plants in space and time. In Variable Plants and Herbivores in Natural and Managed Systems (Edited by Denno, R. F. and McClure, M. S.). Academic Press, New York.Google Scholar
Denno, R. F., Raupp, M. J., Tallamy, D. W. and Rcichclderfer, C. F. (1980) Migration in heterogeneous environments: Differences in habitat selection between the wing forms of the dimorphic planthopper, Prokelisia marginata (Homoptera: Delphacidac). Ecology 61, 859–867.CrossRefGoogle Scholar
Dethicr, V. G. (1959) Egg-laying habits of Lepidoptera in relation to available food. Can. Entomol. 91, 554–561.CrossRefGoogle Scholar
Egley, G. H. (1979) Seed coat impermeability and germination of showy Crotalaria (Crotalaria spectabilis) seeds. Weed Sci. 27, 355–361.CrossRefGoogle Scholar
Evans, E. S. W. (1983) The influence of neighboring hosts on colouration of prairie milkweeds by a seed-feeding bug. Ecology 64, 648–653.CrossRefGoogle Scholar
Faeth, S. H. and Simberloff, D. (1981) Experimental isolation of oak host plants: Effects on mortality, survivorship, and abundances of leaf-mining insects. Ecology 62, 625–635.CrossRefGoogle Scholar
Feeny, P. (1976) Plant apparency and chemical defense. Rec. Adv. Biochem. 10, 1–40.Google Scholar
Force, D. C. (1974) Ecology of insect host-parasitoid communities. Science 184, 624–632.CrossRefGoogle ScholarPubMed
Fox, L. R. and Morrow, P. A. (1982) Specialization: species property or local phenomenon? Science 211, 887–892.CrossRefGoogle Scholar
Fowler, S. V. (1984) Foliage value, apparency and defense investment in birch seedlings. Oecologia 62, 387–392.CrossRefGoogle ScholarPubMed
Hall, R. W. and Ehler, L. E. (1980) Populations ecology of Aphis nerii on Oleander. Environ. Entomol. 9, 338–344.CrossRefGoogle Scholar
Hassell, M. P. (1982) Patterns of parasitism by insect parasitoids in patchy environments. Ecol. Entomol. 7, 365–377.CrossRefGoogle Scholar
Hassell, M. P. and South wood, T. R. E. (1978) Foraging strategies of inseets. Annu. Rev. Ecol. Syst. 9, 75–98.CrossRefGoogle Scholar
Hopper, K. R. (1984) The effects of host-finding and colonization rates on abundances of parasites of a gall midge. Ecology 65, 20–27.CrossRefGoogle Scholar
Huffaker, C. B. (1962) Some concepts on the ecological basis of biological control of weeds. Can. Entomol. 94, 507–514.CrossRefGoogle Scholar
Janzen, D. H. (1968) Host plants as islands in evolutionary and contemporary time. Amer. Natur. 102, 592–595.CrossRefGoogle Scholar
Janzen, D. H. (1972) Escape in space by Sterculia apetala seeds from the bug Dysdercus fasciatus in a Costa Rican deciduous forest. Ecology 53, 350–361.CrossRefGoogle Scholar
Janzen, D. H. (1973a) Host plants as islands. II. Competition in evolutionary and contemporary time. Amer. Natur. 107, 786–790.CrossRefGoogle Scholar
Janzen, D. H. (1973b) Tropical agroecosystems. Science 182, 1212–1219.CrossRefGoogle ScholarPubMed
Janzen, D. H. (1973c) Sweep samples of tropical foliage insects: Effects of seasons, vegetation types, elevation, time of day, and insularity. Ecology 54, 687–708.CrossRefGoogle Scholar
Kareiva, P. (1983) Influence of vegetation texture on herbivore population resource concentration and herbivore movement. In Variable Plants and Herbivores in Natural and Managed Systems (Edited by Denno, R. F. and McClure, M. S.). Academic Press, New York.Google Scholar
Kuris, A. M., Blaustein, A. R. and Alio, J. J. (1980) Hosts as islands. Amer. Natur. 116, 570–586.CrossRefGoogle Scholar
Lemen, C. (1981) Elm trees and elm leaf beetles: Patterns of herbivory. Oikos 36, 65–67.CrossRefGoogle Scholar
Levin, S. A. (1976) Population dynamic models in heterogeneous environments. Annu. Rev. Ecol. Syst. 7, 287–310.CrossRefGoogle Scholar
Levins, R. and Wilson, M. (1980) Ecological theory and pest management. Annu. Rev. Entomol. 25, 287–308.CrossRefGoogle Scholar
Maguire, L. A. (1983) Influence of collard patch size on population densities of lepidoptcran pests (Lepidoptera: Pieridae, Plutellidae). Environ. Entomol. 12, 1415–1419.CrossRefGoogle Scholar
May, R. M. (1974) Stability and Complexity in Model Ecosystems. Princeton University Press, Princeton, NJ.Google Scholar
McLain, D. K. (1981) Numerical responses of Murgantia histronica to concentrations of its host plants. J. Georgia Entomol. Soc. 16, 257–260.Google Scholar
Meijden, E. van der (1979) Herbivore exploitation of a fugitive plant species: Local survival and extinction of the Cinnabar moth and ragwort in an heterogeneous environment. Oecologia 42, 307–323.CrossRefGoogle Scholar
Meijden, E. van der (1980) Can hosts escape from their parasitoids? The effects of food shortage on the braconid parasitoid Apanteles popularis and its host Tyria jacobaeae. Neth. J. Zool. 30, 382–392.Google Scholar
Moore, L. R. (1978) Seed predation in the legume Crotalaria. I. Intensity and variability of seed predation in native and introduced populations of Crotalaria pallida Ait. Oecologia 34, 185–202.CrossRefGoogle ScholarPubMed
Murdoch, W. M. (1975) Diversity, complexity, stability and pest control. J. Appl. Ecol. 12, 795–807.CrossRefGoogle Scholar
Paine, R. T. (1979) Disaster, catastrophe, and local persistence of a sea palm, Postelsia palmaeformis. Science 205, 685–686.CrossRefGoogle ScholarPubMed
Pallasen, G. (1972) Etiella zinckenella a migrating pest. Entomol. Medd. 40, 61–63.Google Scholar
Pandley, B. N. and Sinha, R. P. (1979) Dormancy and germinability of some Crotalaria species. Tropical Ecol. 20, 94–100.Google Scholar
Patterson, D. T. (1982) Effects of shading and temperature on showy Crotalaria (Crotalaria spectabilis). WeedSci. 30, 692–697.Google Scholar
Pimentel, D., Nagel, W. P. and Madden, J. L. (1963) Space-time structure of the environment and the survival of parasite host systems. Amer. Natur. 97, 141–166.CrossRefGoogle Scholar
Ralph, C. P. (1977) Effect of host plant density on populations of specialized, seed-sucking bug, Oncopeltus fasciatus. Ecology 58, 799–809.CrossRefGoogle Scholar
Raupp, M. J. and Denno, R. F. (1979) The influence of patch size on a guild of sap feeding insects that inhabit the salt marsh grass Spartina patens. Environ. Entomol. 8, 412–17.CrossRefGoogle Scholar
Rigby, C. and Lawton, J. H. (1981) Species area relationships of arthropods host plants: herbivores on bracken. J. Biogeography 8, 125–133.CrossRefGoogle Scholar
Root, R. B. (1975) Some consequences of ecosystem texture. In Ecosystem Analysis and Prediction. Proc. Soc. Ind. Appl. Math. (Edited by Levin, S. A.), pp. 83–87. Philadelphia, PA.Google Scholar
Scott, L. R. (1940) The bean pod borers in Puerto Rico. J. Agric. Univ. Puerto Rico 24, 35–47.CrossRefGoogle Scholar
Segarra-Carmona, A. E. and Barbosa, P. (1988a) Relative susceptibility of Crotolaria spp. to attack by Etiella zinckenella in Puerto Rico. J. Agric. Univ. Puerto Rico 72, 147–152.CrossRefGoogle Scholar
Segarra-Carmona, A. E. and Barbosa, P. (1988b) Notes on the natural enemies of Etiella zinckenella in Puerto Rico. J. Agric. Univ. Puerto Rico 72, 153–159.CrossRefGoogle Scholar
Sokal, R. R. and Rohlf, F. J. (1981) Biometry. W. H. Freeman and Co., San Francisco, CA.Google Scholar
Solomon, B. P. and McNaughton, S. J. (1979) Numerical and temporal relationships in a three-level food chain. Oecologia 42, 47–56.CrossRefGoogle Scholar
Sousa, W. P. (1984) The role of disturbance in natural communities. Annu. Rev. Ecol. Syst. 15, 353–391.CrossRefGoogle Scholar
Stamp, N. E. and Lucas, J. R. (1983) Ecological correlates of explosive seed dispersal. Oecologia 59, 272–278.CrossRefGoogle ScholarPubMed
Stearns, S. C. (1976) Life-history tactics: A review of ideas. Q. Rev. Biol. 51, 3–47.CrossRefGoogle ScholarPubMed
Stone, M.W. (1965) Biology and control of the lima bean pod borer in southern California. ARS-USDA Tech. Bull. 1321, 1–46.Google Scholar
Tepedino, V. J. and Stanton, N. L. (1976) Cushion plants as islands. Oecologia 25, 243–256.CrossRefGoogle ScholarPubMed
Vandermeer, J. H. (1974) Relative isolation and seed predation in Calliandra grandiflora, a mimosaccous legume from the highlands of Guatemala. Biotropica 6, 267–268.CrossRefGoogle Scholar
Waage, J. K. (1979) Foraging for patchily distributed hosts by the parasitoid, Nemeretis canescens. J. Anim. Ecol. 48, 353–371.CrossRefGoogle Scholar
Whallcy, P. E. S. (1973) The genus Etiella Zeller (Lepidoptcra: Pyralidac): A zoogcographic and taxonomic study. Bull. Brit. Mus. Nat. Hist. (Entomol.) 28, 3–21.Google Scholar
Wolcott, G. N. (1933) The lima bean pod-borer caterpillars of Puerto Rico. J. Agrric Univ. Puerto Rico 17, 241–255.CrossRefGoogle Scholar
Wolcott, G. N. (1934) Lima bean pod-borer caterpillars of Puerto Rico on their wild hosts. J. Agric. Univ. Puerto Rico 18, 429–34.CrossRefGoogle Scholar