Annales de la Société Entomologique de France (2006) 42, 381-387

Nanqing Jiang, Guofa Zhou, William A. Overholt, Eric Muchugu and Fritz Schulthess (2006)
The temporal correlation and spatial synchrony in the stemborer and parasitoid system of Coast Kenya with climate effects
Annales de la Société Entomologique de France 42 (3-4), 381-387
Abstract: The spatial synchrony and the temporal auto-correlationship of the exotic stemborer Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) and the indigenous Sesamia calamistis Hampson (Lepidoptera: Noctuidae) and Chilo orichalcociliellus (Strand) (Lepidoptera: Crambidae), and cross correlationship with their indigenous and introduced larval parasitoids Cotesia sesamiae (Cameron) and Cotesia flavipes Cameron (Hymenoptera: Braconidae) was studied using 3-year data collected in coastal Kenya. An autoregressive model was used to study the effect of climatic stochasticity or population density-dependent factors on stemborer populations. It appeared that rainfall did have a direct impact on stemborers in the south coast and an indirect one in the north coast. Spatial nonparametric correlation functions (SNCF) and cross-correlation functions (SNCCF) were applied for spatial synchrony analysis. The regional synchrony of Ch. partellus and S. calamistis decreased and that of Ch. orichalcociliellus increased after the introduction of Co. flavipes. The positive cross correlation coefficient between stemborers and parasitoids suggests a synchrony between the pest and its natural enemy.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Nanqing Jiang, William A. Overholt, Fritz Schulthess

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
environment - cropping system/rotation
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
population dynamics/epizootiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Chilo partellus		Kenya
	Sesamia calamistis		Kenya
	Chilo orichalcociliellus		Kenya
Cotesia flavipes (parasitoid)			Kenya
Cotesia sesamiae (parasitoid)			Kenya