ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Control trials against Monilinia spp. on peach in Emilia-Romagna.

Ponti, I.; Spada, G.; Carli, G.; Mazzini, F.;

Informatore Agrario Supplemento Year: 1998 Vol: 54 Issue: 16 Pages: 13-15

1998

บทคัดย่อ

The gravity of attacks by Monilinia spp. on postharvest fruits of peaches is strictly correlated with prolonged periods of rain, fog or dew in the 15-20 days before harvest and with the storage conditions. The introduction of late-maturing cultivars has also increased the risk of damage. Studies were conducted in Emilia-Romagna, Italy, in 1996-97 to compare the efficacy of two new fungicides (cyprodinil and fludioxonil) with that of tebuconazole against postharvest attacks of M. laxa on 2 varieties of peach (Jungerman and Baby Gold 7). It is concluded that postharvest attacks by M. laxa can only be partly controlled by chemical defence in the pre-harvest phase. In both years, attacks in the postharvest phase were high: 61-71% in 1996 and 68-87% in 1997. The best level of control (80%) was given in 1997 by 3 fungicide treatments given in the 17 days before harvest, using in succession tebuconazole, triforine and cyproconazole. Tebuconazole was confirmed as one of the best fungicides used for the

control of M. laxa. Cyprodinil and fludioxonil used in mixture gave comparable activity to tebuconazole. On very susceptible varieties and in climatic conditions favourable to attacks of M. laxa it is suggested that a succession of cyprodinil + fludioxonil and tebuconazole are used in the 2-3 weeks before harvest, with the eventual insertion of cyproconazole 3 days before harvest. It is concluded that chemical defence should be integrated with adequate cultural practices, taking into consideration that if it rains or humidity is high in the days before harvest, the product is at high risk and should be handled with care and marketed in as brief a time as possible.