Determination of Optimum Spraying Time for Chemical Control of Mulberry Scale, Pseudaulacaspis pentagona (Targioni)(Hemiptera: Diaspididae) in Tea Fields

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

Monitoring methods of mulberry scale larvae, Pseudaulacaspis pentagona, were evaluated for determining the spraying time of effective chemical control. Among them, the calculation of the ratio of “more than half hatched egg batches” which was found to be suitable due to its accuracy, is however, time-consuming. Optimum spraying time is defined as the duration of the period required to achieve a ratio of more than half hatched eggs in egg batches (60 to 90%), which is referred to as “more than half hatched egg batches.” The use of sticky traps set inside a tea bush to capture crawlers of the mulberry scale is a simple and accurate monitoring method. The optimum spraying time occurs 2 to 5 days after the peak capture of the crawlers by the traps. The traps should be set up from the beginning of the egg hatching period, and should be examined daily or every other day to determine the peak capture of the crawlers. The use of sticky traps for monitoring is suitable for only the first generation of mulberry scale. Thus observations of “more than half hatched egg batches” are needed to determine the optimum spraying time for the second and third generations of the mulberry scale.

作成者 Akio TATARA
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 155
終了ページ 161
言語 eng