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Optimization of carbofuran 3G in the clean multiplication and maintenance of arbuscular mycorrhizal fungi in pot cultures on Zea mays L. as trap plant

journal contribution
posted on 2005-01-01, 00:00 authored by M P Sharma, Alok AdholeyaAlok Adholeya
Carbofuran (2,3-dihydro-2, 2-dimethyl-7-benzofuranyl methylcarbamate; a systemic nematicide/insecticide) was applied in concentrations ranging from 0 to 3 kg a.i.ha-1 to soil (typical Alfisol) and sand (particle size 500μm) that was with or without inoculation of indigenous arbuscular mycorrhizal fungi (AMF). The influence of the carbofuran on the development of AM symbiosis and plant growth was evaluated in AMF pot cultures using Zea mays as an indicator plant grown both in sand and soil. Carbofuran significantly influenced mycorrhizal development in terms of root colonization and spore production. However, the extent of its effect varied with the substrates and the concentration used. The mycorrhizal plants grown in sand irrespective of carbofuran application showed higher root colonization and spore production than those grown in soil. But the sand grown plants treated at the half the recommended dose of carbofuran (1.5 kg a.i. a.i. ha-1) showed higher AM production profile whereas, plants grown in soil showed similar profile at full recommended dose (3 kg a.i. a.i.ha-1) of carbofuran application. AM inoculation significantly influenced shoot and root dry matters of maize plants grown both in sand and soil. However, interaction effect of AMF and carbofuran found to be significant for root biomass and non-significant for shoot biomass. The shoot and root dry weights of maize did not differ significantly with respect to carbofuran and substrate used. Thus, carbofuran did not inhibit either growth or mycorrhizal status of maize. Application at 1.5 kg a.i. ha-1 and 3 kg a.i. a.i.ha-1 for sand and soil respectively was found to be optimum in terms of AM development and plant growth and could be used safely for clean multiplication and maintenance of AMF pot cultures.



Phytomorphology: An International Journal of Plant Morphology






55 - 63



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