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Biology

All life stages may be spent inside the host palm.  Each adult female deposits individually between 200 to 300 eggs or more in separate holes or cavities on soft tissues in wounds and mechanically injured parts of the host plant. Eggs are whitish-yellow, smooth, shiny, and cylindrical with rounded ends, slightly narrower at the anterior end, and about 3 mm long and 1 mm wide. The eggs hatch in two to five days, and larvae bore into the interior of the palms, feeding on the soft succulent tissues, expelling the chewed up fibrous material. Larvae are legless, robust, with a creamy-white body and brown hard head capsule, and grow up to 50 mm in length. The larval period varies from one to three months depending on factors like host, climate. Pupation occurs in an elongate oval, cylindrical cocoon made of fibrous strands, about 40 mm in length. Adult weevils emerge 2-3 weeks after pupation. Thus the life cycle is completed in about 4 months but sometimes it may extend by several months due to environmental factors.


Latest News
Date    2010-06-04
Prof. Saleh Aldosari Delivers Two Lectures in Tabuk, S. Arabia
Date    2010-05-11
Prof. P.S.P.V. Vidyasagar Delivers Invited Lecture in Spain
Date    2010-05-10
Prof. Saleh Aldosari Delivers Lecture in Madinah
Date    2010-04-11
Dr. P.S.P.V. Vidyasagar to Deliver Seminar on Red Palm Weevil
Date    2010-03-31
News about RPWRC on University Website
Date    2010-03-29
News (March, 2010)
Date    2010-03-05
Participation of the Chair in the Fourth International Date Palm Conference, AbuDhabi, UAE
Date    2010-01-27
Two-Week National Training Program on RPW Completed Successfully
Date    2010-01-16
Red Palm Weevil Research Chair Inaugurated
Date    2010-01-10
Team from Date Palm Research Center (Center of Research Excellence), King Faisal University visits RPW Research Chair on December 28, 2009
Date    2009-12-23
Participation of Red Palm Weevil Research Chair, KSU in Red Palm Weevil Workshop in the Eastern Province
Date    November 9, 2009
Approval of the research plan of the Ph D student in the chair
Date    28/11/1430åÜ
Seminar on Red Palm Weevil in Al-Kharj
Date    October 26-30, 2009
10th Arab Congress of Plant Protection
Date    August 2-7, 2009
94th ESA Annual Meeting