An isolate of the actinomycete, Streptomyces sp. CMU-MH021 produced secondary metabolites that inhibited egg hatch and increased juvenile mortality of the root-knot nematode Meloidogyne incognita in vitro. 16S rDNA gene sequencing showed that the isolate sequence was 99% identical to Streptomyces roseoverticillatus. The culture filtrates form different culture media were tested for nematocidal ...

Abamectin is nematicidal to Meloidogyne incognita and Rotylenchulus reniformis, but the duration and length of cotton taproot protection from nematode infection by abamectin-treated seed is unknown. Based on the position of initial root-gall formation along the developing taproot from 21 to 35 d after planting, infection by M. incognita was reduced by abamectin seed treatment. Penetration of de...

The genetic nature of resistance and its epidemiologic effects on two Meloidogyne incognita populations were assessed in the F hybrid tomato cv. Small Fry. The progeny of a Small Fry x Small Fry cross segregated in a 3:1 resistant:susceptible ratio, indicating the presence of a single, completely dominant resistance gene (LMiR) in Small Fry. In a subsequent experiment, infection frequency and t...

Carnation is one of the most crucial cut flowers in Turkey. Root-knot nematodes (RKNs) cause significant damage on carnation production and quality. Therefore, determination response varieties to RKNs required for management practices. In this study, four cultivars, Turbo, Betsy, Nirvana Glaciar, were inoculated with second stage juveniles (J2s) Meloidogyne incognita, M. javanica arenaria under...

Even though oats (Avena spp.) have the capacity to produce numerous compounds with potential act antagonistically against plant pathogens, studies on genotypic effect of this crop focusing their nematicidal activity are limited. The objective study was verify aqueous extracts prepared biomass oat genotypes, hatching second-stage juveniles root-knot nematodes (Meloidogyne javanica and Meloidogyn...

To identify the chromosome carrying the factor for resistance to Meloidogyne incognita in tobacco, crosses were made between resistant tobacco 'NC95' as pollen parent and each of the 12 tobacco monosomics (A-L) representative of the Tomentosae half of the Nicotiana tabacum chromosome complement. Of the F seedlings, 927 plants were grown for observation. From these, 223 plants were selected as p...

Plant-parasitic nematodes cause serious crop losses worldwidely. This study intended to discover the antagonistic mechanism of Bacillus cereus strain S2 against Meloidogyne incognita. Treatment with B. cereus strain S2 resulted in a mortality of 77.89% to Caenorhabditis elegans (a model organism) and 90.96% to M. incognita. In pot experiment, control efficiency of B. cereus S2 culture or supern...

Biotin-binding proteins (BBPs), such as avidin and streptavidin, represent potent insect control compounds which could be delivered via transgenic plants. The effects of BBPs on some pasture pests were determined. Black field cricket nymphs (Teleogryllus commodus) had significantly reduced growth and survival when fed on lettuce leaves painted with purified avidin. Adult clover root weevils (Si...

Root-knot nematodes belonging to the genus Meloidogyne are the most economically important group of plant-parasitic nematodes. Thei r worldwide distribution, extensive host ranges, and interaction with other plant pathogens in diseas e complexes rank them among the top plant pathogens affecting the world's food supply (5). Even though only four Meloidogyne species M. incognita, M. javanica, M. ...