|
KMID : 0903619860270030239
|
|
Journal of the Korean Society for Horticultural Science
1986 Volume.27 No. 3 p.239 ~ p.248
|
|
|
Effects of NAA and Carbaryl on the Fruit Thinning in Apples (Malus domestica Borkh)
|
|
|
|
|
Abstract
|
|
|
NAA and carbaryl were evaluated to identify the chemical thinning effect on `Fuji´ and `Tsugaru´ apple trees in 1984.
The results are summarized as follows:
1. Fuji cultivar was thinned most effectively by the 15ppm of NAA, and the chemical thinning effect of NAA and carbaryl was accentuated by the increasing concentration in `Tsugaru´.
2. Combinated treatment of NAA and carbaryl was more effective than NAA or carbaryl alone, especially in thinning of lateral fruit. The earlier the treatment time, the better the fruit thinning effect was obtained.
3. Tsugaru cultivar responded more sensitively than Fuji cultivar to chemical thinners, and axillary fruit dropped more easily than terminal fruit in Fuji cultivar.
4. Leaf spray or fruit dipping of the chemicals had little thinning effect, while spraying the chemicals over the tree was most effective.
5. Average fruit and seed size of dropped fruits from chemicals applied tree was smaller than that of remained control.
6. Length and diameter of fruit stalk were not directly related with the fruit thinning efficacy chemicals. The chemicals seemed to exert their thinning effect through not by translocation from leaves to fruit and fruit stalk but by direct absorption by fruit and fruit stalk.
7. Fruit weight was significantly decreased with NA A treatment and increased in carbaryl treatment as compared with control, and similar to the control in the combination of NAA and carbaryl. Other fruit characteristics concerned with quality showed no considerable differences among treatments.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|