Pirimiphosmethyl und Malathion als Getreideschutzmittel gegen vorratsschädliche Insekten im Irak

  • Z. Y. Al-Saffar
  • R. A. Al-Iraqi


Auf Grund des Nachlassens von Malathion als Mittel zum Schutz gelagerten Getreides gegen Vorratsschädlinge infolge Resistenzerscheinungen wurde Pirimiphosmethyl, das gleich mit Malathion gegenTrogoderma granarium-Larven undTribolium confusum-Imagines bei gelagerren Weizen-, Gerste- und Maiskörnern getestet. Die Ergebnisse zeigen, daß die Wirksamkeit beider Insektizide von Wirkstoff, Dosis, Getreideart, Lagerungszeit und Insektenart abhing. Insgesamt erwies sich Pirimiphosmethyl als geeignetes Malathion-Ersatzmittel.

Pirimiphos-methyl and malathion as grain protectants against some stored-product insects in Iraq


Emulsifiable formulation of pirimiphos-methyl and malathion were applied to wheat, barley and maize at rates of 5, 10 and 15 ppm. The treated grains were stored under warehouse storage conditions and the residual effeciency of both insecticides on treated grains were estimated at zero-time, 2, 4, 6 and 8 weeks by using of bioassay tests on 4th instar larvae ofTrogoderma granarium (Everts) and 14-day-old adults ofTribolium confusum (Duval).

Results indicated that the residual effeciency of the insecticides used varied according to the storage period, sort of stored grains, type and rate of insecticide applied. The insect species was also influenced.

Pirimiphos-methyl residues seemed to be more persistent than that of malathion on all treated grains. The effeciency of the insecticidal deposit varied between the different cereals being less on barley than on maize and this than on wheat. BesidesTribolium confusum appeared to be more susceptible to both insecticides thanTrogoderma granarium.

Pirimiphos-methyl proved to be suitable substitute to malathion as grain protectant against possible malathionresistant strains of stored grain insects.


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Copyright information

© Verlag Paul Parey 1981

Authors and Affiliations

  • Z. Y. Al-Saffar
    • 1
  • R. A. Al-Iraqi
    • 1
  1. 1.Mosul UniversityMosulIraq

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