Suitability of soil types for Paecilomyces lilacinus and Pochonia chlamydosporia and their performance against root-knot nematode, Meloidogyne incognita on Lycopersicon esculentum in glass house
Suitability of soil types for Paecilomyces lilacinus and Pochonia chlamydosporia and their performance against root-knot nematode, Meloidogyne incognita on Lycopersicon esculentum in glass house
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发表时间：
2013
影响因子：
0.4
通讯作者：
M. Nagesh;S. Javeed;B. Ramanujam;R. Rangeswaran
中科院分区：
文献类型：
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作者：
M. Nagesh;S. Javeed;B. Ramanujam;R. Rangeswaran
在2007-09年期间，从区域中心、NBSSLUP、班加罗尔收集了五种广泛的土壤类型，即黑棉花、红红土、冲积土、壤质砂和山地土壤，从建立、暂时存活和行为方面，研究了它们对拮抗真菌淡紫拟青霉（Samson）Thomson和厚垣孢Pochonia chlamydosporia（戈达德）Zare、Gams和Evans的NBAII分离物的适合性;对南方根结线虫（Meloidogyne incognita（Kofoid and白色）Chitw.）在温室条件下进行试验，并得出实地指导的基准数据。除黑棉土外，其它土壤类型均适合番茄根系生长、根结线虫侵染和有效寄生。淡紫披碱草和厚垣披碱草在红土、冲积土、壤土和山地土壤中的时间进程行为大致相似。这两种真菌在试验土壤中的前2-3周内建立，在接下来的6-7周内数量增加，在施用后8-10周达到平台，在施用后12周略微下降并达到稳定，遵循或多或少的正常曲线。山地土壤pH值较低，有机碳含量较高，最适合这两种真菌的卵块寄生和繁殖体增殖。山地土、红红土和冲积土适宜番茄根际真菌的建立、增殖和对根结线虫的致病性，这主要归因于土壤有机碳水平较高、pH接近中性和土壤物理成分合理。
During 2007-09, five broad soil types, black cotton, red laterite, alluvial, loamy sand and mountain soils collected from Regional Centre, NBSSLUP, Bangalore, were examined for their suitability to NBAII isolates of antagonistic fungi, Paecilomyces lilacinus (Samson) Thomson and Pochonia chlamydosporia (Goddard) Zare, Gams and Evans in terms of their establishment; temporal survival and behaviour; pathogenicity to Meloidogyne incognita (Kofoid and White) Chitw. under glasshouse conditions and to arrive at the baseline data for field guidance. Except black cotton soil, other soil types examined were suitable for tomato root growth, root-knot nematode infection and effective parasitization of the egg masses by the fungi under report. The time-course behaviour of P. lilacinus and P. chlamydosporia in red laterite, alluvial, loamy and mountain soils were more or less similar. Both the fungi established in the first 2-3 weeks in soils tested, increased in number in the next 6-7 weeks with a plateau at 8-10 weeks after application, marginally declined and reached constancy at 12 weeks after application, following more or less a normal curve. Mountain soil with lower pH and higher organic carbon was best suited to both the fungi in terms of egg mass parasitization and propagules multiplication. Better suitability of mountain soil, red laterite and alluvial soils for these fungal establishment, proliferation and pathogenicity to root-knot nematodes in tomato rhizosphere was attributed to high to medium organic carbon status, near neutral pH and equitable soil physical components.