บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The effect of postharvest and enhanced copper sprays on the control of mango black spot.

Manicom, B. Q.;

Yearbook - South African Mango Growers' Association Year: 1991 Vol: 11 Pages: 17-18 Ref: 2 ref.

1991

บทคัดย่อ

The effect of postharvest and enhanced copper sprays on the control of mango black spot.

An observational trial to assess the importance of late summer sprays and investigate 2 enhanced copper treatments was carried out to determine whether a full scale trial was justifiable. Copper sprays were essential for the control of bacterial black spot [Xanthomonas campestris pv. mangiferaeindicae], giving a 5-fold reduction in black spot and an 80% yield increase. Late summer and winter sprays reduced black spot 2.75-fold but only increased marketable yield by 15% and it is suggested that a single, critically timed early spray could be as effective. There was little difference between the 2 enhanced coppers but both were superior to copper oxychloride giving a 3.5-fold reduction in black spot and 78% increase in yield. The percentage of black spot decreased as the number of copper sprays increased. More sprays reduced black spot and increased yield where postharvest sprays were not applied but this trend was reversed when these were applied.