บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effects of postharvest and bloom applications of phosetyl-Al on fire blight and fruit quality in 'Bartlett' pear.

Sugar, D.; Johnson, K. B.; Lindow, S. E.; Stockwell, V. O.;

Acta Horticulturae Year: 1993 Issue: No. 338 Pages: 289-296 Ref: 1 ref.

1993

บทคัดย่อ

Effects of postharvest and bloom applications of phosetyl-Al on fire blight and fruit quality in 'Bartlett' pear.

Applications of fosetyl-Al to Bartlett pear trees in Oregon, USA, during bloom significantly reduced the percentage of flower clusters infected by E. amylovora at an inoculum concn of 105 c.f.u./ml. Control was less effective when the inoculum concn was 107 c.f.u./ml. E. amylovora was recovered from 32% of untreated blossoms but from only 10% of treated blossoms. Postharvest foliar sprays reduced the recovery of E. amylovora from blossoms the following spring but did not reduce the incidence of fire blight. In California, fosetyl-Al treatments resulted in fewer infections but differences were not significant under natural inoculation with low levels of infection in control trees. No phytotoxicity was observed in Oregon, but in California treatments were associated with increased fruit russet. This paper was presented at the Sixth International Workshop on Fire Blight, held in Athens, Greece, 20-23 Oct. 1992.