Citrus Nematode

Citrus Nematode

 

(Tylenchulus semipenetrans), a parasitic worm of the class Nematoda. The female measures 0.4–0.5 mm in length, and the male 0.3–0.4 mm. The citrus nematode infests the root system of citrus and certain other plants, including grape and olive. It feeds on the cortex of the root, retarding growth and often killing the plant. The citrus nematode is distributed in citrus-growing regions throughout the world. Control measures include planting only healthy plants in noninfested soil, conscientious care of plantings, application of organic fertilizers (which help activate the natural enemies of the citrus nematode in the soil), and treatment of plants with nematocides.

REFERENCE

Kir’ianova, E. S., and E. L. Krall’. Paraziticheskie nematody rastenii i mery bor’by s nimi, vol. 2. Leningrad, 1971.
References in periodicals archive ?
Pathogenicity of citrus nematode (Tylenchulus semipenetrans) on Citrus jambhiri.
Citrus nematode (Tylenchulus semipenetrans) and ring nematode (Criconemella xenoplax) were the only plant-parasitic nematodes.
At species level, citrus nematode populations in deep soil reduced significantly within the first few months (sampling date 2) after soil amendment and then increased significantly in the next two subsequent samples.
Pest control efficacy was evaluated using citrus nematode bioassay counts, fungal dilution plating, and weed emergence counts and biomass collections from each replicated plot.
Nematode control was determined using a citrus nematode bioassay in which two sets of muslin bags containing 100 grams of soil infested with citrus nematode (Tylenchulus semipenetrans Cobb) were buried at 6, 12, 24 and 36 inches below the soil surface in each plot prior to fumigation.
In the country, the mostly used rootstock is rough lemon (Citrus jambhiri) which is highly susceptible to citrus nematode and root rot.
Some studies on the control of Citrus nematode (Tylenchulus semipenetrans) by extracts of three plants and their effects on plant growth variables.
In Pakistan, citrus nematode was found to be widely distributed in all the citrus orchards of Faisalabad, Sargodha, T.
The treatments-1,3-dichforopropene + chloropicrin (578 kg/ha shank injected), iodomethane + chloropicrin (515 kg/ha shank injected or 448 kg/ha drip applied) and propargyl bromide (221 kg/ha shank injected or 207 kg/ha drip applied)--controlled root-knot and citrus nematodes equal to methyl bromide (507 kg/ha shank injected) during an eight-year evaluation period.
Determined its resistance to citrus nematodes in 1981 and its tolerance to citrus blight in 1988.