Journal of Biological Control

The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader).

If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

Alternatively, you can download the PDF file directly to your computer, from where it can be opened using a PDF reader. To download the PDF, click the Download link above.

Fullscreen Fullscreen Off


Field life tables of Chilo partellus (Swinhoe) were constructed for 6 generations from summer 1994 to rabi (winter) 1995 in Bangalore on fodder maize. Positive trend indices were obtained in the 2nd , 3rd and 4th generations, which corresponded to late summer to kharif (monsoon) seasons and negative trend indices in the 1st, 5th and 6th generations corresponding to late kharif (late monsoon) to rabi seasons. Positive trend indices signified greater pest activity during those generations. Maximum contribution to real generation mortality was in egg stage in all the generations as ks of egg period were invariably closer to generation K in each season. Key mortality factor analysis revealed direct density dependence in egg stage with egg parasitoids having highly significant regression coefficient. Mortality due to unknown causes in younger larvae exhibited inverse density dependence. During larval stage, hatching failure, and in pupal stage all mortality factors exhibited delayed density dependence. The result provided rational ecological basis for developing biocontrol - based programme for suppression of C. partellus on fodder maize.

Keywords

Abiotic Factors, Biotic Factors, Chilo partellus, Field Life Tables, Population Dynamics.
User
Notifications