Saad L. Hafez

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chitwoodi Golden, O’Bannon, Santo et Finley, is one of the major nematode pests on potato in the Pacific Northwest region of the United States of America (U.S.A.). Damage caused by this nematode to potato (Solanum tuberosum L.) and the resulting yield loss is a serious concern to growers in this region. Several management tactics, such as chemical (Hafez(More)
Field studies conducted over a 5 yr period to compare the effect of continuous cropping of several potato clones (Butte, Russet Burbank, Targhee, A66107-51, and A68113-4) showed Butte to be highly resistant toPratylenchus neglectus while being highly susceptible toVerticillium dahliae. This was further evidenced during the 6th yr when Russet Burbank was(More)
Nematodes that parasitize sugar beets can seriously limit sugar beet production in Idaho and eastern Oregon. Over two dozen species of these microscopic, worm-like animals can cause severe damage to sugar beets world-wide, and sugar beet yield losses due to nematodes have been estimated between 10 and 80 percent. The severity of damage depends on the(More)
Plant parasitic nematodes are microscopic, worm-like animals that are commonly present in Idaho alfalfa fields. The three most common and economically important groups of nematodes on alfalfa in Idaho and the Pacific Northwest are the alfalfa stem nematode (Ditylenchus dipsaci), root knot nematodes (Meloidogyne species), and root lesion nematodes(More)
Residue dynamics in giapevine of the nematicide aldicarb (2-methyl-(metbylthio) propionaldehyde-O-(Methylcarbamoyl) oxime) and its biologically similar active metabolites, aldicarb sulfoxide and aldicarb sulfone, were determined by gas chromatographic techniques. Residues were found in the roots, trunks, stems, and leaves of grapevine 120 d after(More)
In greenhouse tests using potted grape plants three nematicides, aldicarb 10 G at 4.5 ai/ha, phenamiphos 15 G at 22 kg ai/ha, and oxamyl liquid at 4.5 kg ai/ha, were tested against Xiphinema index on 'Thompson Seedless' grape. Different timings for chemical treatments and X. index inoculations were used to determine some of the aspects of the mode of(More)
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