Lepidoptera and Coleoptera as pests of stored products in Berlin during 1991-1997

Lepidoptera and Coleoptera as pests of stored products in Berlin during 1991-1997 During 1991 to 1997 4078 samples sent in by public and private institutions were tested for their attack by arthropods. 5994 determinations were done. Seven the store damaging species of Lepidoptera were observed. Plodia interpunctella was the prime pest (305 determinations, mainly in cornflakes, muesli, sunflower seeds, nuts, feed, milk porredge and chocolate products). The percentage of P. interpunctella increased: from 4,3% (1991) to 5.6% - 8.4% (for 1993). Larvae and adults and pure larvae Samples of P. interpunctella were mainly noticed from September to November. Pure adults samples could be counted for the most part from March to September. 27 the store damaging Coleoptera-species were determined Stegobium paniceum was the prime pest (164 samples). 4% of the samples involved S. paniceum. Further mainly observed beetle-species were: Lasioderma serricorne (36 samples), Tenebrio molitor (in 75 samples) and Trogoderma angustum (134 samples).