ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Penetration of iprodione into mesocarp fruit tissue and suppression of gray mold and brown rot of sweet cherries.

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

Plant Disease Year: 1994 Vol: 78 Issue: 3 Pages: 293-296 Ref: 20 ref.

1994

บทคัดย่อ

ABSTRACT :

The efficacy of iprodione in controlling postharvest decay of sweet cherries (Prunus avium) caused by Botrytis cinerea and Monilinia fructicola was related to penetration of the fungicide into the mesocarp tissue of the fruit. In lab. studies, fruits sprayed with an aqueous suspension of iprodione at 600 or 1200 micro g a.i./ml (as Rovral 50WP) 1 h before inoculation or 24 h after inoculation (20 micro l of 25 000 conidia/ml), prevented decay or completely suppressed development of decay caused by B. cinerea or M. fructicola. Additionally, penetration of iprodione was shown when fruit surfaces were sprayed with iprodione at 1200 micro g a.i./ml and inoculated at the pit using a syringe containing a conidial suspension of B. cinerea or M. fructicola. Fruits treated with iprodione had less internal decay at the pit caused by either fungus than did fruit sprayed with water. Furthermore, decay was inhibited near the epicarp in treated fruits but not in untreated fruits. The diam. of internal lesions

 at the pit caused by B. cinerea decreased linearly with increasing concn of iprodione. Residues of iprodione in mesocarp tissue of fruit surface-sprayed with iprodione at 1200 micro g a.i./ml ranged from 0.18 to 0.21 micro g/g of tissue.