The Cyst Nematodes by S.B. Sharma

By S.B. Sharma

while Franklin released her publication on cyst nematodes in 1951, the cyst nematodes have been already referred to as critical pests of brassicas, cereals, potatoes and sugar beets. notwithstanding, at the moment this team of nematode, with approximately 12 species, used to be thought of tobe mostly temperate in distribu­ tion. Now a complete of one zero five species (including those who are regarded as synonyms or species inquirende by means of a few or all) inside six genera of cyst nematodes were defined from temperate, tropical, and subtropical areas and no less than 5 species are very important constraints to crop produc­ tion in tropical agriculture. the former impact of localization of cyst nematodes within the temperate area used to be probably an artifact as a result of a better focus of nematologists within the temperate areas. in keeping with my very own event of operating in numerous Asian and African international locations, i think that many extra undescribed species are found in the tropical international locations of Asia and Africa, and possibly in different tropical areas. so much growers, extension staff, and examine managers in those areas are nonetheless now not conscious of the potential damage of presence of those nematodes of their agricultural soils. The cyst nematodes are maybe smaller than the smallest to be had computing device chip yet they're rather well programmed to outlive and professional­ pagate regardless of critical hardships. those nematodes are very selective of their collection of nutrients; approximately 50% of identified species are parasites of vegetation as a rule within the households Poaceae and Fabaceae.

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