Normal view MARC view ISBD view

Effect of certain ecological factors on population density of Tthrips tabaci lind. attacking onion crop [electronic resource].

By:

Abd El-Hameed, Neama A

Contributor(s):

Language: English Summary language: Arabic Description: P.925-930Other title:

تأثير العوامل الجوية علي تعداد حشرة التربس علي محصول البصل [Added title page title]

Uniform titles:

Mansoura university journal of plant protection and pathology, 2011 v. 2 (11) [electronic resource].

Subject(s):

Online resources:

Full Text Article.

In: Mansoura University Journal of Plant Protection and Pathology 2011.v.2(11)Summary: Changes in the seasonal population of Thrips tabaci lind. attacking onion crop and the effect of environmental factors were studied throughout (200612007&200712008) onion growing seasons .R appeared in few numbers by the 2nd week of February. Dynamics of the nymphal stage showed increase steadily aller half of February until end of March , and highest decrease in population density of thrips was recorded at temperature 24.52 and relative humidRy 69 in ll~,:ps populations, The values of correlation coefIIclent infar that infestation and1Pagree days are highly correlated . The simple regression value (b) indicate that for evary 1.0 temperature increase in degree days there are 3.5 indMduallncreased and so on. In onion growing season aller rain falls population of T., /abaci decreased.

Average rating: 0.0 (0 votes)

No physical items for this record

Includes references.

Changes in the seasonal population of Thrips tabaci lind. attacking onion crop and the effect of environmental factors were studied throughout (200612007&200712008) onion growing seasons .R appeared in few numbers by the 2nd week of February. Dynamics of the nymphal stage showed increase steadily aller half of February until end of March , and highest decrease in population density of thrips was recorded at temperature 24.52 and relative humidRy 69 in ll~,:ps populations, The values of correlation coefIIclent infar that infestation and1Pagree days are highly correlated . The simple regression value (b) indicate that for evary 1.0 temperature increase in degree days there are 3.5 indMduallncreased and so on. In onion growing season aller rain falls population of T., /abaci decreased.

Summary in Arabic.

There are no comments on this title.

to post a comment.