ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

The effect of post-harvest epidemics of powdery mildew on yield and growth of strawberry cv. Elsanta.

Berrie, A. M. and Burgess, C. M.

Acta Horticulturae Year: 1997 Issue: No. 439, II Pages: 791-798 Ref: 5 ref.

1997

บทคัดย่อ

Severe epidemics of powdery mildew (Sphaerotheca macularis) develop postharvest on June-bearing strawberry cultivars such as Elsanta. Previous studies have shown such attacks to have no effect on yield the following season. In the current study initiated in 1992 in the UK, up to 14 sprays of myclobutanil or bupirimate were required to achieve control. However, this did not result in significant differences in total yield between treatments in any year. Plants mildewed the previous autumn were significantly smaller in winter but differences in size disappeared quickly with the resumption of rapid growth in spring. In each of the 3 seasons of the study mildew failed to develop on untreated plots in spring, despite the high disease levels the previous autumn. Subsequent studies in the plots indicated that leaves infected with mildew in November at the end of the epidemic had senesced by the following spring. However, in a second crop, where large numbers of cleistothecia of S. macularis were presen

t the previous autumn, mildew was first noted in April. This indicates a need to re-examine overwintering of the strawberry powdery mildew in fungus in the UK.