Survey on red palm weevil (Rhynchophorus ferrugineusolivier, coleoptera, curculionidae)‎ on date palm in some infected areas in Wadi Hadhramout

Abstract EN

A Comprehensive survey study of Red palm weevil (Rhynchophorus ferrugineus) (RPW) was conducted during the year 2017 in seven villages of Seiyun, Shibam and Al-Qateen Districts in Wadi Hadhramout.

A 4477 palmswere surveyed of these trees 322 palms (4.27%) were found infested by Red palmweevil.

The results showed a level of old infestation between 25 – 34% and a level of new infestation between 31 – 37%.

The pest incidence was also differenced according to date varieties different among date varieties different.

Eighteen investigated date palm varieties showed different response towards infestation by RPW.

Sabiahsafra and Khalas were highly affected by 16.67% and 11.67% RPW infestation, whereas Nabootsaif and Mijraf showed just 2.42% and 1.32% degree of infestation respectively.

The rest has no infestation.

The results indicated that infestation by Red palm weevil was higher in trees groups of 6 - 10 years recording 6.14% followed by 5.77%, 4.46% in groups of 1 - 5 years and 10 – 15 years respectively, however older trees 16 older than years are more resistant to infestation.

Place of infestation on the date palm stem correlate negatively with trunk heights maximum infestation of 73.9% occurred in the heights of 0.0 – 0.5 in followed by 20.8%, 4.65% and 0.62 at heights of o.6 – 1.0, 1.1 – 1.5 and 1.6 – 2.0 respectively, however no infestation was detected in trunk heights above 2.5 meter.-