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This profile was last updated on 8/27/14  and contains information from public web pages.

Dr. Saad L. Hafez

Wrong Dr. Saad L. Hafez?


Phone: (208) ***-****  HQ Phone
Email: s***@***.edu
Local Address: Boise, Idaho, United States
University of Idaho
875 Perimeter Drive
Moscow , Idaho 83844
United States

Company Description: Founded in 1889, the University of Idaho is the state's flagship higher-education institution and its principal graduate education and research university. The...   more

Employment History

Board Memberships and Affiliations

44 Total References
Web References
Dr. Saad L. Hafez, ..., 5 Dec 2013 [cached]
Dr. Saad L. Hafez, Professor, Director of Nematology Laboratory, University of Idaho -- Parma, ID
Dr. Hafez will lead a discussion about the evaluation, identification, control and prevention of nematodes in corn and alfalfa.
Ag News [cached]
University of Idaho nematologist Saad Hafez thinks Idaho's agricultural producers should consider including green-manure crops in their rotations. The fall- or spring-planted crops-typically oilseed radishes or mustards-build and replenish soils when they're turned under after a few months' growth. They also slash nematode populations by serving as nonhosts or poor hosts for the sugarbeet- and potato-damaging pests as well as by releasing biofumigating chemicals and activating natural enemies.
For the past eight years, Hafez has studied crop rotations involving sugarbeets, potatoes, wheat, sweet corn, beans and oilseed-radish green manures. Last fall, he started a new study that includes onions and that's slated to continue for a dozen years. Not only will Hafez and other researchers measure the impacts of onions in these rotations, but they will examine the physical changes in soil produced by the green-manure crop. "You get great benefits from green-manure crops, even if you don't have sugarbeet cyst nematodes or other nematodes," Hafez says.
For example, as organic matter builds, soil tilth and water-holding capacity increase and compaction and erosion decrease. The organic matter slowly releases nitrogen into the soil, reducing the need for synthetic nitrogen without leaching excess fertilizer into > groundwater.
Hafez says more producers would use green-manure crops, but they haven't been able to fit them into their crop rotations. "The stumbling block is the timing," he says. "During the time that growers would be planting the green-manure crop, they are harvesting other crops or getting the ground ready for next year, so their labor and equipment are tied up."
Selecting the right green-manure crop is also critical: some will host diseases, weeds or even the very nematodes growers would like to control. Others aren't as frost tolerant as they should be. Hafez says new oilseed radishes not yet available in the marketplace should entice more Idaho potato and sugarbeet growers into giving green-manure crops a try within a few years: the varieties Defender and Comet cut populations of both sugarbeet cyst nematodes and potato-damaging Columbia root-knot nematodes by 95 and 99 percent, respectively, in his greenhouse experiments.
"Their main advantage is that they reduce both of these nematodes," says Hafez. Previously, green-manure crops that discouraged one nematode encouraged the other. In addition, Defender and Comet reach nematode-inhibiting growth stages in six to eight weeks-two weeks earlier than other varieties. That will give growers more opportunities to squeeze them into their rotations after a fall-harvested crop or before a spring-planted crop.
The best older varieties of oilseed radish green-manures curbed populations of Columbia root-knot nematodes by 50 percent and sugarbeet cyst nematodes by 80-90 percent, Hafez says. He will evaluate the effectiveness of Defender and Comet in the field and hopes they will be available to Idaho growers by 2006.
In the 1998-2004 study, Hafez and colleague Sundararaj Palanisamy determined that potatoes and beans suppress sugarbeet cyst nematodes more than wheat or sweetcorn do. In the current and longer study, Hafez will study not only the impacts of six crops but of fall-planted oilseed-radish green-manures included once, twice or three times over the course of 12 years.
"If one year is enough, we don't need two," he says.
The study was conducted by Dr. ..., 1 July 2013 [cached]
The study was conducted by Dr. Saad Hafez, Idaho state nematologist at the University of Idaho Research and Experiment Center in Parma, Idaho.
Saad L. ..., 22 April 2014 [cached]
Saad L. Hafez Extension Professor, Nematology Parma Research & Extension Center Phone: 208-722-6701 ext. 237
Society of Nematologists - Committees, 15 Jan 2005 [cached]
Saad L. Hafez Parma Research & Extension Center
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