บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Occurrence of Penicillium digitatum and P. italicum resistant to benomyl, thiabendazole and imazalil on citrus fruit from different geographic origins.

Bus, V. G.; Bongers, A. J.; Risse, L. A.;

Plant Disease Year: 1991 Vol: 75 Issue: 11 Pages: 1098-1100 Ref: 19 ref.

1991

บทคัดย่อ

Occurrence of Penicillium digitatum and P. italicum resistant to benomyl, thiabendazole and imazalil on citrus fruit from different geographic origins.

During 1 year, 1287 isolates of P. digitatum and P. italicum were collected from decayed mandarins (Citrus reticulata), oranges (C. sinensis), lemons (C. limon) and grapefruit (C. paradisi) at the wholesale markets in Rotterdam, Netherlands and Paris, France. The isolates were cultured on media with various fungicides and concn. Of the P. digitatum isolates, 37% grew at 4 and 10 mg/litre of thiabendazole (TBZ), 35 and 34% at 4 and 10 mg/litre of benomyl (BEN), respectively, and 17 and 12% at 0.2 and 0.5 mg/litre of imazalil (IM), respectively. Of the P. digitatum strs tolerant of TBZ, 90% were also tolerant of BEN, and 13% of the strs tolerant of either one or both benzimidazoles showed double tolerance of IM. Forty percent of P. italicum isolates showed tolerance of 4 mg/litre of TBZ and 38% of 10 mg/litre of TBZ, but only 29 and 13% were tolerant of BEN at 4 and 10 mg/litre, respectively and 1% of 0.2 mg/litre of IM. The level of cross-tolerance between the benzimidazoles was 73%. Tolerance of

 Penicillium of benzimidazoles was highest in isolates taken from grapefruit, less in those from oranges and mandarins, and least in isolates recovered from lemons. However, the level of tolerance of IM was higher in isolates from lemons.