The coast of Hadhramout is one of the most important coconut palm cultivation areas in Yemen, which occupy about 105 thousand acres. Since the end of the ninth decade of the nineteenth century, the phenomenon of deformation of coconut fruits began to spread and became a major problem for coconut palm farmers, and the cause was not diagnosed, so a survey and diagnostic study was carried out during the period from January to July 2018 and included 111 farms in the provinces of Hadhramout coast, famous with cultivation of coconut palms. The severity of infection was measured in 15 regions, after which the cause of this phenomenon was diagnosed. The results showed that most of the fruitful coconut palm farms that have been visited have symptoms of deformation of coconut fruits, and the infection rate fluctuated between 8 - 100%, with an average of 80% for districts, and this means that the phenomenon covers all coconut palm farms. Consequently, it is a problem pervaded all over regions and the injury severity was distributed throough five degrees of injury and the fifth degree was the highest (40%) followed by the fourth degree (29%), and the first degree which represents the healthy fruits, was 5% only. This means that the deformation phenomenon of coconut fruits was widespread in the districts of Hadhramout coast, and these symptoms have spread throw about 95%. The samples of eriophyid mites were diagnosed by the Insect and Acari Museum in Agriculture and Food faculty, King Saud University, Saudi Arabia. The results showed that the samples have coconut mite Aceria guerreronis Keifer.
Bagawigu, Amjad Ahmed and Ba-Angood, Saeed Abdalla
"Survey of the Coconut Palm Fruits Deformation in the Coast of Hadhramout and the Diagnosis of the Cause,"
Hadhramout University Journal of Natural & Applied Sciences: Vol. 17
, Article 12.
Available at: https://digitalcommons.aaru.edu.jo/huj_nas/vol17/iss2/12