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- W2143144955 abstract "Abstract Three candidate insecticides, chlordimeform, diflubenzuron and diflubenzuron/endosulfan were evaluated under field conditions as ovicides. Diflubenzuron or/and diflubenzuron/endosulfan exhibited an inhibitory activity in suppressing the number of deposited egg‐masses. Chlordimeform showed quite attraction to the cotton leafworm moths and subsequently increased the number of egg‐masses laid. In addition, diflubenzuron/endosulfan and diflubenzuron alone exerted the highest ovicidal activity since a considerable percentage of nonhatched egg‐masses was achieved. On the other hand, chlordimeform in comparison showed the last effect. Regarding the larvicidal activity, chlordimeform proved to be the most potent tested compound against neonate larvae. Likewise, bollworms infestation percentage was remarkably reduced in chlordimeform‐treated plots, compared with inferior results observed in other treatments. However, there was adverse effect on the population or/and activity of prevailing biological agents, demonstrated by reduction in percentage of egg‐masses attacked by benificial insects in all treated plots in comparison to those of the control. Zusammenfassung Freilanduntersuchungen über die ovizide Wirkung einiger Insektizide bei der Baumwolleule, Spodoptera littoralis (Boisd.) Drei Insektizide: Chlordimeform, Diflubenzuron (= Dimilin) und Diflubenzuron/Endosulfan wurden auf ihre ovizide Wirkung im Freiland getestet. Diflubenzuron oder/und Diflubenzuron/Endosulfan zeigten eine hemmende Wirkung, indem sie die Zahl der abgelegten Spodoptera ‐Eier verminderten. Chlordimeform dagegen zeigte eine anziehende Wirkung auf die Spodoptera ‐Falter und führte zu einem Anstieg der Zahl abgelegter Eier. Darüber hinaus hatten Diflubenzuron und Diflubenzuron/Endosulfan die höchste ovizide Wirkung und verursachten, daß ein erheblicher Prozentsatz abgelegter Eier nicht schlüpfte. Chlordimeform hatte nur einen schwachen oviziden Effekt. Bezüglich der larviziden Wirkung wies Chlordimeform die stärkste Wirkung (gegen frischgeschlüpfte Larven) auf. Der Spodoptera ‐Befall war gegenüber früheren Bekämpfungsverfahren mit anderen Wirkstoffen viel geringer. Dagegen bestand eine unerwünschte Nebenwirkung darin, daß die Aktivität der biologischen Gegenspieler gegenüber den Kontrollflächen stark reduziert wurde. Dies zeigte z. B. der Prozentsatz der von nützlichen Insekten zerstörten Eier." @default.
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- W2143144955 date "1980-01-12" @default.
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- W2143144955 title "Field evaluation of certain insecticides for ovicidal activity of the cotton leafworm, Spodoptera littoralis (Boisd.)" @default.
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- W2143144955 doi "https://doi.org/10.1111/j.1439-0418.1980.tb03447.x" @default.
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