|Title:||A Study of Seasonal Influence in Quantitative Vvariation of The Citrus Nema, Tylenchulus semipenetrans Cobb||Other Titles:||線蟲柑橘發生量與季節關係之研究||Authors:||Mo-chu Toung
|Issue Date:||1963||Publisher:||植物保護學會||Journal Volume:||5||Journal Issue:||3||Start page/Pages:||223-227||Source:||植物保護學會會刊||Abstract:||
This investigaton has been conducted for one year, from July of 1962 to June of. 1963, at the Citrus Experiment Station, Yangrningshan, Taipei, Taiwan, China. Results reveal that the mean number of the adult female was highest in June, while lowest in December, January, February and March; and., that from July to October the mean number significantly increased, then decreased from October to March, and again prominently increased from March to June. From these results it may be approximately concluded that the population of this nema varied with season, and may be influenced by different natural conditions occurred in different season, such as soil temperature, rainfall, and its natural enemies. In addition, the “June drop” seriously occurred in early summer at this place seems to be possibly in part associated with this nema, because the most severe infestation of this nema took place just in this period. Hereafter, if some orchard control measures for this nema will be availabie, this period should be given a special consideration.
|Appears in Collections:||士林園藝試驗分所(1921-1972)|
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