บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Influence of crop management on watery scales in onions: a survey in South-Eastern Norway.

Solberg, S. O.; Boe, E.;

Journal of Vegetable Crop Production Year: 1999 Vol: 5 Issue: 1 Pages: 31-42 Ref: 11 ref.

1999

บทคัดย่อ

Influence of crop management on watery scales in onions: a survey in South-Eastern Norway.

A survey among onion growers and extension officers in Toten, Norway, was carried out from 1981 to 1995. The study was used both to describe trends in onion crop management and to pinpoint some factors related to total postharvest losses due to watery scales. The occurrence of watery scales increased during the first part of the 1980s; watery scales were not observed in 1981 and 1982, but the occurrence of watery scales was recorded at around 2, 6 and 10% of the yield in 1983, 1984 and 1985, respectively. Annual variations in watery scales can be explained by meteorological data. Years with high precipitation in August and September had the highest frequency of watery scales. A positive correlation between rainfall during the 3 last days of field curing and watery scales was found. High air humidity during the drying process could also be related to high occurrence of watery scales. In 1988, 28% of farmers indicated that the symptoms of watery scales were first observed in the field, whereas 6%

replied that the symptoms were first seen during storage.