TY  - JOUR
A1  - Aggarwal, Naveen
A1  - Holaschke, Markus
A1  - Basedow, Thies
T1  - Evaluation of bio-rational insecticides to control Helicoverpa armigera (Hübner) and Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) fed on Vicia faba L.
T2  - Mitteilungen der Deutschen Gesellschaft für Allgemeine und Angewandte Entomologie
N2  - Two botanical pesticides, Neem Azal-T/S (NA) and Quassia amara, one biopesticide, Bacillus thuringiensis subsp. aizawai (Bta) and one combination of Bta + NA were tested against 2nd and 4th instar larvae of the noctuids Helicoverpa armigera (Hübner) and Spodoptera exigua (Hübner) on field beans under both laboratory and greenhouse conditions. The maximum mortality of 58 and 27 % was obtained in Bta + NA treatments in case of 2nd and 4th instar larvae of H. armigera under laboratory conditions followed by Bta (50 and 14 %) and NA (34 and 7 %) alone treatments. Under greenhouse conditions a mortality of 69 and 26 % was observed in case of Bta + NA treatments in 2nd and 4th instar larvae of H. armigera followed by Bta (67 and 20 %) and NA (56 and 10 %) alone. The mortality of H. armigera larvae was higher under greenhouse conditions. There was a significant difference in the mortality between 2nd and 4th instar larvae both under laboratory and greenhouse conditions. The mortality of H. armigera was higher in 2nd instar than in the 4th instar larvae in all treatments. Similar results were obtained in case of S. exigua both under laboratory and greenhouse conditions. The results indicate that Bta and NA have the potential to the control of H. armigera and S. exigua either independently or in combination, when used at the right stage of the field populations. The uassia-extracts tested did not show a high efficacy against larvae of H. armigera and S. exigua.
KW  - Helicoverpa armigera
KW  - Spodoptera exigua
KW  - control
KW  - Bacillus thuringiensis aizawai
Y1  - 2006
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/17452
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-1102742
SN  - 0344-90840
SN  - 0344-9084
VL  - 15
SP  - 245
EP  - 250
PB  - Deutsche Gesellschaft für Allgemeine und Angewandte Entomologie
CY  - Gießen
ER  -