Ecological studies on the green shield scale, Pulvinaria psidii (MASK.) (HEMIPTERA: COCCIDAE) Infesting mulberry trees in Qalubyia Governorate, Egypt [electronic resource].
Language: English Summary language: Arabic Description: p.1329-1338Other title:- دراسات بيئية على حشرة البلفيناريا القشرية الرخوية Pulvinaria Psidii (MASk). على أشجار التوت بمحافظة القليوبية [Added title page title]
- Mansoura University journal of agricultural sciences, 2009 v. 34 (2) [electronic resource].
Includes reference.
The present investigation was carried out through two successive years (2005/2006 and 2006/2007) in Qalubyia governorate to determine some ecological aspects of the green shield scale, Pulvinaria psidii (Mask.) (Hemiptera: Coccidae) on mulbeny trees. The obtained results showed that, P. psidii had two main periods of seasonal activity occurred in autumn (one generation) and summer (two overlapping generations) per each year. The 1st period of seasonal activity lasted for 4 months, started from mid September to early January and had one generation, peaked in mid November or early December with mean numbers of 26.5-69.6 insect/leaf. The 2nd period of seasonal activity extended from early May to mid August with duration of 4 months and had two overlapping generations. The 1st generation peaked in early June and the 2nd in mid July / early August in both studied years.
Summary in arabic.
Summary in Arabic.
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