A field trial was conducted for 2 years in an Arredondo fine sand containing a tillage pan at 15-20 cm deep to determine the influence of subsoiling on the distribution of corn roots and plant-parasitic nematodes. Soil samples were taken at various depths and row positions at 30, 60, and 90 days after planting in field corn subsoiled under the row with two chisels and in non-subsoiled corn. At ...

Sensitivity and host efficiency of susceptible ('Lee 68', 'Coker 156') and resistant ('Bragg', 'Centennial', 'Forrest', 'Lee 74') soybean (Glycine max (L.) Merr.) cultivars for races of Meloidogyne incognita (Mi) were determined in greenhouse experiments. Eight Mi populations collected from the southeastern United States were utilized. All Mi races reproduced readily on Lee 68 and Lee 74 and mo...

○ Background Production of organic ginger Zingiber officinale Roscoe, Japanese variety, is subject to serious economic loss from several soil borne pests. The plant parasitic root-knot nematode (RKN) Meloidogyne incognita is a persistent pest for ginger production in soils worldwide. Pathogenic bacteria Ralstonia solanacearum, which causes “bacterial wilt” of ginger, has become a serious threat...

ABSTRACT Root-knot nematodes (Meloidogyne spp.) are sedentary, obligate endoparasites in plants, where they induce specialized feeding sites. The feeding sites act as strong metabolic sinks to which photosynthates are mobilized. The histopathological modifications in the nematode-induced feeding sites of artificially inoculated chickpea cv. UC 27 were qualitatively and quantitatively compared u...

Penetration of second-stage juveniles (J2) of Meloidogyne incognita into tomato root explants and in vitro propagated peach plantlet roots were compared. Five inoculum levels were used: 25, 50, 75, 100, and 200 J2 for tomato; and 50, 100, 200, 500, and 1,000J2 for peach. The greatest root penetration into tomato was 30% at the 75 J2 level, but the maximum penetration into peach roots was only 8...

_____________________________________________________________________________________ ABSTRACT: Momordica charantia roots were histologically examined for the interaction of Meloidogyne incognita and the fungus Paecilomyces lilacinus which was applied at different time intervals. Meloidogyne incognita induced large sized galls on the plants which were treated with P.lilacinus. Fully mature fema...

During a 6-year study of 1-, 2-, and 3-year crop rotations, population densities of Pratylenchus brachyurus, Trichodorus christiei, and Meloidogyne incognita were significantly affected by the choice of crops but not by length of crop rotation. The density of P. brachyurus and T. christiei increased rapidly on milo (Sorghum vulgate). In addition, populations of P. brachyurus increased significa...

Resistant and susceptible cultivars of tomato, lima beans, cotton, and alfalfa were tested with 10 populations of Meloidogyne incognita from different California locations. Nine of the populations differed in aggressiveness on the nine cultivars tested. Two populations were especially aggressive toward resistant tomato cultivars.

Secondary microbial invasion of tomato plants inoculated with 6,000 Meloidogyne incognita larvae caused 75 and 48% weight reduction of foliage and roots, respectively. Under aseptic conditions the same number of larvae caused only 37% reduction of foliage and increased root weight by 50%.