บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Influence of environmental conditions on dispersal of Botrytis cinerea conidia and on post-harvest infection of gerbera flowers grown under glass.

Kerssies, A.;

Plant Pathology Year: 1993 Vol: 42 Issue: 5 Pages: 754-762 Ref: 26 ref.

1993

บทคัดย่อ

Influence of environmental conditions on dispersal of Botrytis cinerea conidia and on post-harvest infection of gerbera flowers grown under glass.

Dispersal of B. cinerea in a gerbera crop grown in 2 glasshouses 30 km apart was studied over a period of 18 months in 1988 and 1989. Conidia were caught in spore traps consisting of agar in Petri dishes exposed at different heights in the crop in each glasshouse. No seasonal patterns were identified in the spore catches, assessed as colonies on the agar traps after incubation. The number of lesions caused by conidial infection of gerbera flowers following incubation, however, showed a distinct pattern. In spring and early summer few lesions were recorded whereas at other times of the year many lesions appeared on the cut flowers. In linear regression analysis, variation in numbers of colonies (spore catches) could not be explained by environmental factors recorded during the experiments. Linear regression accounted for 77 and 81% of the variation in the number of lesions on flowers in the 2 glasshouses, in terms of RH (positively correlated), global radiation outside the glasshouse (negatively

correlated) and age of the crop (positively correlated). Despite differences in the systems by which the gerbera crop was produced and in the spore catches, the numbers of lesions on gerbera flowers in the 2 glasshouses were significantly correlated though not significantly different from each other.