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This profile was last updated on 9/23/15  and contains information from public web pages and contributions from the ZoomInfo community.

Dr. Saad L. Hafez

Wrong Dr. Saad L. Hafez?


Local Address:  Parma , 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

47 Total References
Web References
When it comes to nematodes, you ..., 8 April 2015 [cached]
When it comes to nematodes, you have to emphasize management, said Saad Hafez, a nematologist at the University of Idaho's Parma Research and Extension Center, during the Washington-Oregon potato conference in Kennewick, Washington.
"It's not something you can eradicate or eliminate," he said. "Fumigation works very well controlling nematodes."
Hafez said that current fumigants in use to control nematodes and potato diseases include Telone II, Telone C-17 and C-35 1,3D, Vapam (metam sodium), Metam Potassium and Metam Ammonia.
"Metam sodium is not really a true fumigant but reacts like a fumigant. It's a contact biocide," said Hafez.
"I want to emphasize that we've been working on a lot of new chemistry," said Hafez. "In the last 10 years a lot of chemical companies have shown interest in developing new nematicides.
For years the list of nematicides was a short one that included Vydate, Mocap, Nimitz and Admire but Hafez said that there have been promising results with new products.
With all the non-fumigant products he said that both the application method and the timing of application is very critical for the treatments to be successful.
Hafez said that Nimitz, a nematicide produced by Adama, is a good nematicide but it doesn't move well in the soil and is best used in combinations with other products, not as a standalone treatment.
Recently introduced products have been discovered to have efficacy against nematodes.
Hafez said that Bayer CropScience's insecticide Movento has been effective against nematodes.
He said that Movento works systemically. The first application should be at the plant's roseate stage and followed 14 days later by a second application.
"You have to apply it when you have enough foliage for penetration and you have to apply it with a surfactant," Hafez said.
"Movento is a very active nematicide, not a standalone treatment," he said. "You have to do it in combination with Vapam, Vydate or Mocap."
Hafez recommended using Absorb, a soil penetrant, to aid in water movement with nematicides.
"We found out that when we mix Absorb with Vapam, we get better results controlling nematodes," he said.
Hafez said that planting non-host plants or green manures are both effective preventative strategies to reduce nematodes.
He said that a study on corn, beans and wheat showed that corn is a bad rotation crop because the nematode can survive in the corn roots.
Green manure crops Hafez has been testing include mustard, radish, beets, lentils, cabbage and onion.
"Basically, if you're planting brassica, radish or mustard, you're adding natural vapam to the soil," Hafez said.
Hafez said that the best solution to stop the spread of nematodes is to clean your equipment before moving from a field, to not use wastewater and to use certified seed.
"You can spread nematodes, especially root-knot, very easy with infected seed," he said.
"If you can leave the field fallow for one summer you can get 90 percent control of root-knot," Hafez said.
Society of Nematologists - Committees, 15 Jan 2005 [cached]
Saad L. Hafez Parma Research & Extension Center
"The more heat units you have, ..., 8 July 2015 [cached]
"The more heat units you have, you have more generations of insects and diseases," said Saad Hafez, professor of nematology at the University of Idaho's Parma research station.
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.
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