Carrot (Daucus carota cv. Mascot) plants exhibiting symptoms of yellowing, purpling, and curling of leaves, proliferation of shoots, formation of hairy secondary roots, and plant decline were observed in March 2014 and February 2015 in commercial fields in the Gharb Region of Morocco. The symptoms...

In March of 2014, carrot plants (cv. Mascot) exhibiting symptoms of yellowing, purpling, and curling of leaves, proliferation of shoots, formation of hairy secondary roots, general stunting, and plant decline were observed in commercial fields in the Gharb region of Morocco. The symptoms resembled...

The pine sawyer beetle Monochamus galloprovincialis is one of the main vectors of the pathogenic pine wood nematode Bursaphelenchus xylophilus, the causal agent of pine wilt disease. Although the nematode is absent from northern Africa, the vector M. galloprovincialis has been previously reported...

The ability of the Russian wheat aphid (D. noxia) and the green peach aphid (Myzus persicae) to vector Moroccan isolates of barley yellow dwarf luteovirus (BYDV-PAV) was evaluated on oat cv. Clintland 64 and the results of virus transmission were checked by direct ELISA. No evidence of biotype...

Experiments were undertaken on the spread and control of potato leaf roll luteovirus (PLRV) in potatoes grown for seed production in the Souss Valley of Morocco. Two locations were considered: Ait Melloul, 10 km from the Atlantic Ocean; and Ouled Abdellah, 90 km inland. Potatoes were colonized by 3 ...