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タイトルヨミ
2シュルイ ノ ニカメイガ ランキセイ バチ ノ キョウゾン
タイトル別表記
Coexistence of two egg parasites of the rice stem borer, Trichogramma japonicum ASHMEAD and Phanurus beneficiens ZEHNTER
ファイル
言語
日本語
著者
大竹 昭郎
内容記述(抄録等)
1. A discussion is brought up on the interrelation between two species of egg parasite of the rice stem borer, Trichogramma japonicum ASHMEAD and Phanurus beneficiens ZEHNTER, which inhabit together in a rice field in Matue district.
2. It is frequently observed that an egg mass is simultaneously parasitized by both species, as tabulated in Table I. It is concluded from the agreement between the observed frequency of parasitized egg masses by both species and the calculated frequency based upon probability, that the egg deposition of one species parasite to an egg mass is not influenced by another species even if an egg mass of the borer has already been parasitized by another.
3. It seems that both species have no ability of discrimination between healthy and parasitized egg and P. beneficiens is killed by T. japonicum when multiple parasitism occurs between them.
This is the reason that the number of P. beneficiens in the egg mass parasitized by both species is frequently less than that in the egg mass parasitized by P. beneficiens alone, as represented in Figure 1.
4. Multiple parasitism, however, did not occur so frequently, because the number of host eggs parasitized by T. japonicum in each egg mass is usually small comparing to the total numder of eggs composing an egg mass, and great number of them remains to be available for parasitization.
Therefore, in spite of the population of P. beneficiens is checked by that of T. japonicum both parasites can coexist in the same place, in the same time.
掲載誌名
島根農科大学研究報告
4
開始ページ
63
終了ページ
68
ISSN
05598311
発行日
1956-05-30
NCID
AN00108241
出版者
島根農科大学
出版者別表記
The Shimane Agricultural College
資料タイプ
紀要論文
部局
島根大学
備考
A,Bを含む
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