Studies on Peanut Green Mosaic on Peanut (Arachis hypggaea L.)

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Date
1994
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Professor Jayashankar Telangana State Agricultural University
Abstract
A mosaic disease of groundnut caused l»! peanut green mosaic virus (PGMV) produced chlorotic spots and vein clearing on young leaves followed by mosaic mottling and ring spots in subsequent leaves. Host range studies revealed. that the virus has a narrow host range. It produced systemic mosaic on Sesamum indicum among crop plants and chlorotic local lesions on Chenopodium amaranticolor among indicator plants tested. Among several weeds tested none was found to be susceptible to the virus isolate. Out of 20 groundnut varieties screened, none was found resistant to the virus. Among the fourteen non-hosts tested for antiviral principles (AVP), Mirabilis jalapa completely inhibited PGMV. Pre—inoculation spray of M. jalapa was found to be effective against the virus. Undiluted extract of g. jalapa completely inhibited infection. The leaf extract of the same could be stored for 4 days at room temperature (27—30“C) and in incubator (25“C) without any appreciable loss in its inhibiting property. However storing in the incubator found to be effective. The four chemicals viz., carbendazim, acetyl salicylic acid, salicylic acid and benzoic acid, when applied as foliar spray before inoculation, kn! mixing with inoculum or spraying after inoculation reduced the disease incidence and increased the incubation period.
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D4594
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