Palm Weevil in Saudi Arabia
The Palm Weevil (Rhynchophorus ferrugineus) in the Kingdom of Saudi Arabia is a dangerous and destructive insect species that infests palm trees in Saudi Arabia. Its native habitat is India, and it first appeared in Saudi Arabia in 1987, with the first recorded infestation in Al-Qatif Governorate in the Eastern Province. Since then, it has spread to several provinces across Saudi Arabia. The Ministry of Environment, Water, and Agriculture (MEWA) has made efforts to combat it in cooperation with farmers and specialists to limit its spread and damage.
Red Palm Weevil
It is a type of plant beetle, scientifically known as Rhynchophorus ferrugineus. Originally from India, it has since spread to many parts of the world, including the Middle East and North Africa (MENA), as well as Pakistan, Indonesia, the Philippines, Sri Lanka, Thailand, Iraq, the United Arab Emirates, Egypt, Jordan, Spain, and Japan.
The red palm weevil goes through several growth stages as it feeds on the palm's internal tissues, creating tunnel-like cavities inside the trunk. These cavities ultimately lead to the tree's collapse and damage.
The palm weevil's life cycle begins when the female lays between two hundred and five hundred eggs in cracks, crevices, and wounds already present in the palm, often caused by other pests or environmental factors. This is followed by the larval stage, which is the most dangerous to the palm. The insect then enters the pupal stage before becoming a fully grown adult. Its lifespan ranges from two to four months.
Symptoms of palm weevil infestation
Symptoms of the red palm weevil infestation in palm trees include the death and decay of offshoots, which can be easily detached. The trunk and base of the fronds begin to disintegrate, and a decayed, sawdust-like substance appears at the infection site. Darkening sap may ooze from crevices or the base of the fronds. Other signs include yellowing and dying fronds, which can be easily pulled from their place, as well as visible boreholes and cavities at the infestation site. Occasionally, the sound of larvae chewing inside the trunk can be heard. In advanced stages, the palm completely collapses.
Methods of controlling the palm weevil
Once a palm tree is found to be infested with the palm weevil, specific control methods must be implemented. These include spraying the infected palms with specialized pesticides to prevent the insect from spreading, destroying the infected trees by shredding or cutting them into small pieces using shredding machines, and then burning and burying them. Additionally, the site of the removed palms is sprayed with pesticides, and pheromone traps are set up to attract the palm weevil while avoiding direct irrigation of the trunk using modern irrigation methods.
Efforts of MEWA to prevent the palm weevil
MEWA set strict procedures and guidelines for dealing with palm trees infested by the red palm weevil. These efforts are carried out in cooperation with farmers and pest control teams to prevent and limit the spread of the pest across Saudi Arabia's provinces and governorates. Among these measures is the application of agricultural quarantine, which includes a firm commitment not to transfer palm trees or offshoots from infested areas to uninfected ones. It is mandatory to obtain a Certificate of Origin from the ministry's branches when moving offshoots to uninfected sites. Buyers must ensure the presence of a metal collar bearing the seal of MEWA and an internal Certificate of Origin. Other measures include promptly reporting any suspected infestation, regularly clearing farms of weeds, trimming palm fronds, using light and pheromone traps, and organizing the irrigation process.