国立研究開発法人 国際農林水産業研究センター | JIRCAS

Damages in Rice Plants Caused by Ear-Sucking Bugs in the Muda Area, West Malaysia

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Outbreaks, damages in rice plants and ecology of ear-sucking bugs in the Muda area were investigated. Leptocorisa oratorius was the most common species in paddy fields and its density was the highest among the bugs. The high density of this bug was observed at the milkripe stage of rice plants in weedy fields, especially where the Echinochloa crus-galli complex predominated. The harvested rice samples collected from 8 rice mills showed that the total ratio of pecky and empty grains was 8.4-29.7%. Although all of the empty grains were not necessarily attributed to rice bugs, their attacks seemed to cause a serious yield-loss. Caging experiments showed that L. oratorius adults damaged 6.40-7.66 grains/day/adult at maximum, when the adults were released on the panicle at the flowering stage. The relationship between the density of L. oratorius in paddy fields and the number of damaged grains was not clear as indicated by a low regression of the latter to the former (r=0.405). It was therefore difficult to estimate the control threshold from this relationship, The control of weeds, especially E. crus-galli complex, seemed to be the most effective and practical means to reduce rice damages caused by ear-sucking bugs.

刊行年月1992-07-01
作成者Kiyomitsu ITO Hachiro SUGlYAMA Nik Mohd. Noor b.Nik Salleh
データ作成日1992-07-01
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
26
1
開始ページ67
終了ページ74
言語eng