Abstract
The phytotoxicity of narrow-range petroleum spray oils, D-C Tron produced by Caltex, to satsuma mandarin was investigated at Huangyan, Zhejiang, China, in 1998-2000. D-C Tron at 0.5% was sprayed 4-10 times every year from late April to early October. Spray operations were conducted after 16.00 h during midsummer. Bad effects were not found on leaf drop, fruit drop, fruit yield and quality, except that monstrous flower rate was increased when spray was performed during flower bud period and sunburn disease spot appeared slightly more visible when sprayed in September and October. Cumulation dosage per year should be controlled below 4%.
Original language | English |
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Pages (from-to) | 216-220 |
Journal | Acta Agriculturae Zhejiangensis |
Volume | 14 |
Issue number | 4 |
Publication status | Published - 2002 |
Keywords
- agriculture
- China
- phytotoxins
- Satsuma orange
- petroleum