caa a22 4500 388105461 CHVBK 20180307125336.0 cr unu---uuuuu 161130e199903 xx s 000 0 eng 10.1017/S174275840001660X doi S174275840001660X pii (NATIONALLICENCE)cambridge-10.1017/S174275840001660X Seasonal fluctuations of Cotesia flavipes Cameron (Hymenoptera: Braconidae) parasitism in borers of sorghum and sugarcane in southern India [Elektronische Daten] Field experiments were carried out at Coimbatore, Tamil Nadu State, India, for four consecutive years (1990-94), to monitor the seasonal activity of Cotesia flavipes Cameron (Hymenoptera: Braconidae), a larval parasitoid of gramineous borers, including the sugarcane shoot borer (Chilo infuscatellus Snellen), sugarcane internode borer (Chilo sacchariphagus indiens (Kapur) and sorghum stemborer (Chilo partellus Swinhoe) (all Lepidoptera: Crambidae). The highest levels of parasitism (0.0-17.9%) were recorded on Ch. partellus followed by Ch. sacchariphagus indiens (0.0-8.3%) and Ch. infuscatelliis (0.0-1.1%). The parasitoid was collected in Ch. partellus and Ch. sacchariphagus indiens in all the four study years, whereas it was not observed in Ch. infuscatelliis during 1993-94. Parasitism rates in Ch. partellus were positively correlated with minimum temperature and afternoon RH. In Ch. sacchariphagus indiens, parasitism levels showed significant negative correlation with minimum temperature. Parasitism rates in Ch. saccharipliagus indidus larvae collected during harvest from seven sugar factory areas of Tamil Nadu State were lower in 1992-93 (0.0-1.8%) and higher in 1993-94 (0.0-3.2%) than those recorded at Coimbatore in the corresponding period (December-March). Cotesia flavipes was the only larval parasitoid recorded from the borers both at Coimbatore and the seven sugar factory areas surveyed in Tamil Nadu. Copyright © ICIPE 1999 Cotesia flavipes nationallicence parasitism rates nationallicence seasonal fluctuations nationallicence Chilo partellus nationallicence sorghum nationallicence Chilo saccharipliagus indiens nationallicence Chilo infuscatellus nationallicence sugarcane nationallicence Cotesia flavipes nationallicence taux de parasitisme nationallicence fluctuations saisonnières nationallicence Chilo partellus nationallicence sorgho nationallicence Chilo saccariphagus indiens nationallicence Chilo infuscatellus nationallicence canne à sucre nationallicence Srikanth J. Sugarcane Breeding Institute, Coimbatore 641007, India Easwaramoorthy S. Sugarcane Breeding Institute, Coimbatore 641007, India Shanmugasundaram M. Sugarcane Breeding Institute, Coimbatore 641007, India Kumar R. Sugarcane Breeding Institute, Coimbatore 641007, India International Journal of Tropical Insect Science Cambridge University Press 19/1(1999-03), 65-74 1742-7584 19:1<65 1999 19 JTI https://doi.org/10.1017/S174275840001660X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S174275840001660X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Srikanth J. Sugarcane Breeding Institute, Coimbatore 641007, India NATIONALLICENCE 700 1- Easwaramoorthy S. Sugarcane Breeding Institute, Coimbatore 641007, India NATIONALLICENCE 700 1- Shanmugasundaram M. Sugarcane Breeding Institute, Coimbatore 641007, India NATIONALLICENCE 700 1- Kumar R. Sugarcane Breeding Institute, Coimbatore 641007, India NATIONALLICENCE 773 0- International Journal of Tropical Insect Science Cambridge University Press 19/1(1999-03), 65-74 1742-7584 19:1<65 1999 19 JTI CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge