ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Comparative efficacy and systemic activity of iprodione and the experimental anilide E-0858 for control of brown rot on peach fruit.

Osorio, J. M.; Adaskaveg, J. E.; Ogawa, J. M.;

Plant Disease Year: 1993 Vol: 77 Issue: 11 Pages: 1140-1143 Ref: 24 ref.

1993

บทคัดย่อ

Iprodione, benomyl or the experimental anilide E-0858 (formerly SC-0858), when used as a pre- or postharvest spray, limited the size of brown rot lesions on fruit of peach cv. Elegant Lady inoculated with conidia of Monilinia fructicola. Fungicides applied 21, 14, 7 or 1 d before harvest reduced lesion diam. on inoculated fruit in storage compared with nontreated fruit. Brown rot lesions on fruit treated with E-0858 were smaller than those on fruit treated with the other 2 fungicides. Postharvest hydrocooling using chlorinated water after fungicide treatment reduced the efficacy of iprodione or benomyl but not the efficacy of E-0858. Penetration of fungicides into fruit was demonstrated by injecting conidia of the fungus to a depth of 1 cm in fruit that were surface-treated 1-21 d before harvest or 1 d after harvest with E-0858, iprodione or benomyl. In all treatments, fruit treated with E-0858 had less decayed tissue than nontreated fruit or fruit treated with iprodione or benomyl. When sprays were applied 1 d or 7 d preharvest or postharvest, fruit treated with iprodione had more nondecayed internal tissue than fruit treated with benomyl or not treated. In fruit treated with radioactively labelled fungicide, 51% of measurable radioactivity of 14C E-0858 and 2.8% measurable radioactivity of 14C iprodione was detected in mesocarp tissue. The remainder of the measurable radioactivity of each fungicide was recovered within 1 mm below the fruit surface. It is concluded that the efficacy of iprodione and E-0858 is attributed to their high activity against M. fructicola and their penetration into mesocarp tissue of peach fruit.