บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Control of postharvest pear diseases using natural saprophytic yeast colonists and their combination with a low dosage of thiabendazole.

Chand-Goyal, T.; Spotts, R. A.;

Postharvest Biology and Technology Year: 1996 Vol: 7 Issue: 1/2 Pages: 51-64 Ref: 27 ref.

1996

บทคัดย่อ

Control of postharvest pear diseases using natural saprophytic yeast colonists and their combination with a low dosage of thiabendazole.

A total of 31 morphologically different strains of yeasts and yeast-like fungi, isolated from the surface of pear fruits were evaluated for biocontrol potential of blue mould on d'Anjou pear fruits. A total of 7 yeast strains (Cryptococcus albidus strain HRB2, C. infirmo-miniatus strain YY6, C. laurentii strain HRA5, Rhodotorula aurantiaca strain YCL5 and R. glutinis strains HRA3, HRA4 and HRB6) reduced the incidence of blue mould (Penicillium expansum) on pears. C. laurentii HRA5 and R. glutinis HRB6 were most effective for reduction of incidence and severity of blue mould. C. laurentii HRA5 and R. glutinis HRB6 combined with a low dose of thiabendazole (TBZ) (15 micro g/ml) gave significantly better disease control at 5, 10 and 20 deg C than either TBZ or the yeast alone and was comparable to disease control achieved using a commercially-recommended high dose of TBZ (525 micro g/ml). C. infirmo-miniatus strain YY6 was most effective for the control of Mucor (M. piriformis) rot of pears. C. lau

rentii HRA5, C. infirmo-miniatus YY6 and R. glutinis HRB6 reduced incidence and severity of grey mould (Botrytis cinerea) of pears and were more effective when combined with a low dose of TBZ. Side rot (Phialophora malorum) of Bosc pears was completely controlled by C. laurentii HRA5, C. infirmo-miniatus YY6 and R. glutinis HRB6, whereas TBZ was ineffective. Bull's-eye rot (Pezicula malicorticis) of pears was completely controlled by all yeasts when they were combined with a low dose of TBZ. Populations of C. laurentii HRA5, C. infirmo-miniatus YY6 and R. glutinis HRB6 in pear wounds increased approximately 1.3 log units within 10 d at -1 deg and 1.7 log units in 2 d at 5, 10 and 20 deg . Addition of cell-free supernatants of yeast cultures to wounds did not suppress decay, and substances inhibitory to fungal germination were not detected on culture plates.