Insect antifeedant action of some fungicides

Abstract

The insect antifeedant property of five commonly used fungicides ‐ Bordeaux mixture, Dithane M45, Dithane Z78, Difolaton and Hinosan ‐ was evaluated against fourth instar Rice Swarming Caterpillar, Spodoptera mauritia under laboratory and field conditions. Dithane Z78 was found to exhibit the maximum antifeedant action. The action persisted in field up to 20 days in the case of Dithane M45. There was a positive correlation between reduction in larval and pupal weights of the test insects on one hand and the mean weights of leaf protected over control, on the other. Zusammenfassung Über die hemmende Wirkung einiger Fungizide auf das Freßverhalten von Insekten Die Eigenschaft 5 häufig verwendeter Fungizide (Bordeaux‐Mischung, Dithane M45, Dithane Z78, Difolatan und Hinosan) auf das Freßverhalten von Spodoptera mauritia (4. Larvenstadium) wurde unter Labor‐ und Feldbedingungen geprüft. Dithane Z78 war am wirksamsten. Im Feld war Dithane M45 20 Tage effektiv. Es wurde eine positive Korrelation zwischen der Gewichtsabnahme der Insektenlarven und Puppen einerseits und dem mittleren Blattgewicht andererseits im Vergleich zur Kontrolle festgestellt.

Influence of orchard fungicides on Apple Maggot Fly egglaying attempts

“…When incorporated into artificial diet, tin-containing fungicides were toxic to three lepidopterous pests of soybeans (LIVINGSTON et al 1978). Bordeaux mixture was determined to have antifeedant properties against some insects (JOHN et al 1982;HARE et al 1983), with the primary basis of this effect being due to the copper component (HARE et al 1983). Benomyl is directly toxic to the ladybird beetle Stethovus punctum (LeConte) (COLBURN and ASQUIYH 1973), and both directly toxic and moderately ovicidal to the mite predator Amblyseius fallacis (NAKASHIMA and CROFT 1974).…”