Ditylenchus dipsaci and Fusarium oxysporum f. sp. medicaginis synergistically affected the mortality and plant growth of Ranger alfalfa, a cultivar susceptible to stem nematode and Fusarium wilt. The nematode-fungus relationship had an additive effect on mortality and plant growth of Lahontan (nematode resistant and Fusarium wilt susceptible) and of Moapa 69 (nematode susceptible and Fusarium w...

Plant-parasitic nematodes were found in 4 of the 12 clades of phylum Nematoda. These nematodes in different clades may have originated independently from their free-living fungivorous ancestors. However, the exact evolutionary process of these parasites is unclear. Here, we sequenced the genome sequence of a migratory plant nematode, Ditylenchus destructor We performed comparative genomics amon...

Since sa infoin may be in t roduced into areas infested with the alfalfa s tem nema tode , we ini t ia ted a s tudy to de te rmine if Ditylenchus dipsaci (K~ihn) Fi l ipjev is pa thogen ic to sa infoin , and what effect t empe ra tu r e has on n e m a t o d e pa thogen ic i ty and rep roduc t ion . G e r m i n a t i n g seeds of sa infoin ( O n o b r y c h i s viciaeJolia Scop. 'Esk i ' and 'Vi...

Ditylenchus dipsaci-infected and noninfected alfalfa plants in a naturally infested field were studied from July 1980 to September 1982. Forty-one percent of the plants died during the study. Ninety-seven percent of the plants that died were infected with D. dipsaci. Sixty-nine percent of the observed mortality occurred during winter. Forage yield of infected plants was significantly lower than...

1 Situation hyperbolique en dimension finie Considérons un champ de vecteurs dans R n de classe C k au voisinage de 0, k ≥ 2 , tel que 0 soit point stationnaire dZ dt = F (Z), F (0) = 0 (1) et notons L = DF (0). On dit qu'on a une situation hyperbolique si l'axe des imaginaires està une distance positive du spectre de L. Plus précisément, soit σ le spectre de L, i.e. l'ensemble de ses valeurs p...

Hot-water dips with and without the additives abamectin and sodium hypochlorite were evaluated for control of Ditylenchus dipsaci infection of garlic seed cloves. All treatments were compared to hot water-formalin clove dip disinfection and to nontreated infected controls for garlic emergence, midseason infection, bulb damage, and yield at harvest in field plots in 12 experiments. Hot-water tre...

Treatment of daffodil (Narcissus pseudonarcissus) bulbs in a 0.37% formaldehyde water solution at 44 C for 240 minutes is a standard practice in California for management of the stem and bulb nematode, Ditylenchus dipsaci. Recent concern over the safety of formaldehyde and growers' requests for a shorter treatment time prompted a reevaluation of the procedure. The time (Y, in minutes) required ...

DOUDA O. (2005): Host range and growth of Stem and Bulb Nematode (Ditylenchus dipsaci) populations isolated from garlic and chicory. Plant Protect. Sci., 41: 104–108. Host range and growth of two Ditylenchus dipsaci (Stem and Bulb Nematode) populations on onion, garlic, leek, spinach and chicory were compared. Inoculation was conducted by placing a droplet of 1.5% CMC suspension containing nema...