A Study of Seasonal Influence in Quantitative Vvariation of The Citrus Nema, Tylenchulus semipenetrans Cobb

Mo-chu Toung; 童慕秋

A Study of Seasonal Influence in Quantitative Vvariation of The Citrus Nema, Tylenchulus semipenetrans Cobb

Other Title

線蟲柑橘發生量與季節關係之研究

Journal

植物保護學會會刊

Journal Volume

5

Journal Issue

3

Pages

223-227

Date Issued

1963

Date

1963

Author(s)

Mo-chu Toung

童慕秋

URI

https://scholars.tari.gov.tw/handle/123456789/1406

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. 本試驗於1962年7月開始在陽明田橘柑試驗場內進行，至1963年6月止，為時一年。經此一年來觀察統計之結果，此蟲之發生量以六月為最高，十二月、元月、二月。及三月為最低。從七月至＋月，此蟲發生之數量有顯著為加；從十月至三月則轉下降，從三月至六月，又復逐步上昇，至六月而達最高量。由此可知，此蟲在一年中發生之數量，因季節之變換而有不同。各季節之土溫、雨量、及其天敵，可能係影響其天敵，可能係影響其數量變異之重要因子。此外，在陽明山一帶之桶柑六月落果現象頗為嚴重，而此時恰為此蟲發生數量最多之時。故經推測，可能與此蟲之為害有部份之關連。將來對于此蟲如有適當之田間防治方法可尋，則在一時期應宜特別注意施行防治。

Publisher

植物保護學會

Type

journal article

File(s)

Name

5-3-323-327.pdf

Size

350.02 KB

Format

Adobe PDF

Checksum

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