Red Palm Weevil | weevil Control | red weevil Pest control | Weevil pest control | red Palm Tree | Rhynchophorus ferrugineus Oliv | Date palm tree | Redweevil.com

News of Red Palm Weevil Research Chair, King Saud University

As the world is celebrating 5 June as ‘World Environment Day’, I am glad to inform my readers on this special day, that I have recently taken up the position as chair professor of the newly created Red Palm Weevil Research Chair at King Saudi University, Riyadh, Kingdom of Saudi Arabia.  It is very thoughtful of the University to establish a chair specifically to focus research on RPW, so as to develop new methods of controlling the weevil for the benefit of date palm farmers all over the world.  We are planning to have cooperation and collaboration with the Ministry of Agriculture and other institutions with in the country and abroad.  We are contemplating to bring together a galaxy of international experts to conduct research and find innovative solutions to the problems caused by RPW in KSA and worldwide.  I will continue to blog on the site to answer questions from international visitors and also post any new information on the pest.  I am happy to announce that there is going to be another website exclusively devoted to the R&D of RPW from my University.  There are many features lined up for the benefit of palm farmers in the website.  We thrive for excellence in RPW management in environment friendly, sustainable and viable manner. By Prof. Dr. P.S.P.V. Vidyasagar.

New Report of Pest from Curacao

A very interesting story is developing on the first report of Red Palm Weevil from Willemstad, Curacao, Caribbean.  This report of Rhynchophorus ferrugineus from Curacao has generated quite a bit of discussion and controversy.  Hugh has commented and questioned the veracity of the R. ferrugineus species from Curacao.  He wanted Gerard van Buurt of Curacao to look in to the identification of the pest.  Benedikt shared his information about the export of a few date palms from Egypt to Curacao through some landscapists and the possible presence of RPW.  Ajlan wanted more stringent national and international quarantine measures.

We have deviated quite a bit away from our main topic of discussion.  Here the point we want to know is whether the report of R. ferrugineus from Curacao is correct or not.  If somebody is expressing doubts, then it should be cleared beyond any iota of doubt.  For this purpose, we need to know complete details about this matter, from a cross section of people belonging to this particular region especially Gerard van Buurt and also Hugh.  Once it is confirmed that RPW, R. ferrugineus indeed is present, then all palms including imported date palms (ornamental) and also coconut palms abounding in the region should be monitored by the local authorities.

Next point that comes to mind is the distribution and coexistence of two species of palm weevils, R. palmarum and R. ferrugineus at the same place.  If so, which one is more dominating and how is the newly reported species finding its feet in the new region? What are its preferred host plants?  Likewise several other aspects need to be explored by researchers and the stake holders like farmers, landscapists, policy makers etc should be informed about the ill effects of the new species in their environment.  Public and private sector should work together in tackling this problem more effectively.  Not only this but other countries in the region should be alerted and a regional conference called immediately to address the impending problem.

Although stringent international quarantine laws are in place, there are several loopholes in the procedures and methods adopted.  Certainly FAO /IPPO/EPPO can initiate action in coordinating the regional groups and expert panels to recommend tangible actions.  However, it is the responsibility of individual governments to take appropriate action in arresting the spread of this menace.

Year 2009

I wish all visitors and contributors to my blog a Happy and Prosperous New Year 2009. The past year was eventful in the sense, that there were alarm bell ringing about climate change in various forums worldwide and most of the agencies have started focusing on this impending peril.  Of course it is imperative that the first victim of climate change would be agriculture especially in fragile ecosystems.  Under the rapidly changing conditions of industrialization, population growth in some parts, demand on land for increased food production, generation of astounding amounts of waste, mass consumerism in some countries, and others, palm trees cannot escape the wrath of climatic changes in the coming decades.  Our knowledge about the impact of these weather changes on the population dynamics of Red Palm Weevil, Rhynchophorus ferrugineus Oliv in various agro-climatic zones as well as palm based cropping systems is limited.  Hence, it is necessary to formulate research projects on these aspects, so as to generate adequate  information to deal with the pest more effectively.   In the coming years, more attention should be paid to study in detail the consequences of the changes in climate on the population dynamics like buildup, dispersal, survival, etc. in new areas hither to unaffected by this pest.  I feel this is a priority area in view of the fact that the pest has overcome the geographical barriers to reach and cause heavy damage in new continents in the past decade and half or so.  The R & D labs in public and private sector should work hard to test and validate the new and alternate technologies thoroughly in the field under the watchful eye of experts and ensure that the final product is biosafe, effective, practical, and makes economic sense for user.  It is heartening to see new developments taking place in many countries to develop alternate methods of control apart from refining the existing control methods.  Care should be taken to see that the new control methods do not cause ecological disaster in the long run.  The success of any pest control program especially, R. ferrugineus management depends up on the net working of extension departments, training program, refresher courses, study visits etc.  In spite of the availability of all resources viz., strong financials, material, skilled staff, etc. many national programs have not yielded the desired results. Though there are many reasons for this situation, perhaps it may be due to botched up strategies, plans, prioritization, execution etc.  For the success of a control program, coordination among various agencies is a critical component.   One should look at the pest as a dynamic system that is evolving constantly and we have to device ways and means to subjugate it before it is late. Let us hope the New Year will bring new and innovative technologies within the reach of farmers across the world. I urge the researchers, managers, policy makers, growers and people connected with this devastating pest to write their comments, views, experiences for the benefit of others.

Red Palm Weevil Videos

Album Pics

 Eggs

 Early instar larvae

 Middle instar grub in partially fed sugarcane bits

 Pupa (fibrous cocoon removed)

 Rearing in sugarcane bits

 Rearing adults (split sugarcane bits removed)

 Damaged coconut palm cut to show exit hole marks

 Damaged coconut palm cut to show various stages of grubs (inset enlarged grubs)

 Toppled coconut palm crown due to severe damage

 Red Palm Weevil damage resulting in fall of young Date Palm 

 Coconut Palm with bunches

 Date Palm bearing profusely

 Dr P S P V Vidyasagar in lab

Introduction

Palms around the world are ruthlessly attacked and damaged by the Red Palm Weevil.  It targets coconut, date, oil and other palms causing great economic loss to the growers.  In some countries it not only causes direct losses but also  transmits diseases as a vector of dreaded red ring disease in oil palm in latin American countries.

The red weevil is reported to be a native of south Asia but surprisingly no natural enemy of any consequence is noticed in this part.  Perhaps that is the reason why the pest has spread to newer  regions in the past two decades at a phenomical speed.  As the scientific community makes concerted efforts to suppress the pest, evidence is emerging about the occurrence of the pest from newer areas and continents.

On a evolutionary basis, it is safe to say that the red palm weevils are divided in to several species.  The ones present in Asia especially India, Sri Lanka, Malaysia etc are categorized as Rhynchophorus ferrugineus Oliv.  The species found in Americas is R. palmarum and the one in Africa is R. phoenicious.

Read the rest of this entry »

Preventive methods

Prevention is better than cure.  So it is always advantageous to restrict the entry of the weevil stages into the palms.  As a prophylactic measure, young palms may be soaked with a pesticide at periodic intervals.  This will kill the hidden adults in the palm crowns and also any pest stages present in crevices and damaged tissues.

Read the rest of this entry »

Weevil Species & Dristribution

1. Rhynchophorus ferrugineus Oliv  -   Asia, Africa, Europe

2. Rhynchophorus palmarum  (L) -    Mexico, Central and South America

3. Rhynchophorus cruentatus (F)  -  Florida, the coast of south-eastern USA, South Carolina to Texas

Read the rest of this entry »

Host plants

R. ferrugineus is essentially a pest of palms, being recorded on Areca catechu, Arenga pinnata, Cocos nucifera, Borassus flabellifer, Phoenix dactylifera, Phoenix sylvestris, Phoenix canariensis, Elaeis guineensis, Calamus merillii, Caryota maxima, Caryota cumingii, Corypha gebanga, Corypha elata, Livistona decipiens , Metroxylon sagu, Oreodoxa regia, Sabal umbraculifera, Trachycarpus fortune, Washingtonia sp., etc. It can also attack Agave Americana and sugarcane ( Saccharum officinarum).

Most important palms are Coconut palm, Date palm and Oil palm.

Damage

Almost the entire damage is caused by the larvae that feed on the inner tissues of host palm near the crown or some part of the trunk region.  In coconut the damage is towards the upper portion of trunk but in date palm the damage is more at the base of the trunk.  The external symptoms produced by the pest attack include the presence of small bore holes on the stem, oozing out of brown viscous liquid, spit out chewed tissue fibers and longitudinal splitting of leaf bases.  Sometimes the trunk becomes hollow with severe damage to the inner tissues.  In the final stages the crown gets toppled as a result of severance of crown from main stem.