บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The response of 'Hosui' Japanese pear to time of hand thinning and chemical thinning agents.

Burge, G. K.; Spence, C. B.; Dobson, B. G.;

Scientia Horticulturae Year: 1991 Vol: 45 Issue: 3-4 Pages: 245-250 Ref: 16 ref.

1991

บทคัดย่อ

The response of 'Hosui' Japanese pear to time of hand thinning and chemical thinning agents.

Changes in fruit size in response to flower and early fruitlet thinning were measured in Pyrus pyrifolia cv. Hosui in an orchard at Himatangi, New Zealand. All trees were thinned to a standard crop load after the final fruit set. Heavy flower thinning reduced initial fruit set and resulted in a significant increase in fruit size. The efficacy of chemical thinning agents, used commercially on other pome fruits, was also determined for this cultivar. Carbaryl (0.4 or 0.8 mg/litre) and NAA (5, 7.5 or 15 mg/litre) did not reduce fruit set, but NAA did increase the proportion of fruit with calyx disorder. Ethephon (300 or 600 mg/litre) reduced fruit set, but did not increase fruit size. NAA and ethephon treatments did not influence the harvest maturity or occurrence of postharvest disorders.