ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Wind scab of French prune: symptomatology and predisposition to preharvest and postharvest fungal decay.

Michailides, T. J.; Morgan, D. P.;

Plant Disease Year: 1993 Vol: 77 Issue: 1 Pages: 90-95 Ref: 14 ref.

1993

บทคัดย่อ

Severe scabbing, termed wind scab (WS), of French prune (Prunus domestica 'French' [plums]) in California, USA, was caused by developing fruit rubbing against other fruit, leaves and shoots during strong wind gusts prevailing from north to northwest. WS occurred only during years in which north or northwest winds exceeded 20 km/h for at least 10 d within 3 weeks after full bloom. The affected areas developed several layers of cutinized cells, the outer layers showing deep fractures that retained moisture and facilitated germination of fungal spores and penetration by their germ tubes. Both incidence and severity of WS on mature fruit correlated positively (R2=0.72-0.91 and 0.94, respectively) with the incidence and severity of WS on dehydrated fruit. Surfaces of wind-scabbed areas acted as traps in collecting fungal propagules, and the incidence of decay caused by Phomopsis cinerascens was significantly higher in fruit with WS. Although germinated spores of P. cinerascens could penetrate directl

y through the epidermal layers of unwounded ripe and overripe plums, wounds or cracks on wind-scabbed fruit facilitated infection.