Abstract
Mortality ofHeliothis armigera (Hbn.) larvae due to nuclear polyhedrosis virus (NPV) was significantly higher onGossypium barbadense (cv. DCH 32) than onG. birsutum (cv. LRA 5166) andG. arboreum (cv. K 10). A positive correlation existed between leaf area consumed and NPV mortality of the larvae. Among the three dosages of NPV tested, 2.16×108 polyhedral occlusion bodies (POB)/ml as ultra low volume application caused the maximum larval mortality. Probit analysis of time mortality responses showed that the LT50 was lower onG. barbadense than on other two species tested.
Zusammenfassung
Die Mortalität vonHeliothis armigera (Hbn.)-Larven, hervorgerufen durch den Kernpoledrose-Virus (NPV), war auf der Baumwolle-SorteGossypium barbadense DCH 32 signifikant höher als auf den beiden SortenG. hirsutum LRA 5166 undG. arboreum K 10. Es bestand eine positive Korrelation zwischen der verzehrten Blattfläche und der NPV-Mortalität der Larven. Innerhalb der 3 getesteten NPV-Dosierungen verursachten 2.16×108 Polyeder/ml bei ULV (ultra low volume)-Anwendung die höchste Larvenmortalität. Die Probitanalyse zeigt, daß die LT 50 der Larven anG. barbadense niedriger war als an den beiden anderen Baumwolle-Sorten.
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Dhandapani, N., Jayaraj, S. & Rabindra, R.J. Laboratory studies on the efficacy of nuclear polyhedrosis virus againstHeliothis armigera (Hbn.) on some cotton cultivars. Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 66, 96–100 (1993). https://doi.org/10.1007/BF01906819
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DOI: https://doi.org/10.1007/BF01906819