Assessment of yield losses as a result of co-infection by maize streak virus and maize stripe virus in Mauritius
Code (CO)MSI99P1309
Author (AU)Roca de Doyle, M. M.
Autrey, L. J. C.
Title - English (ET)Assessment of yield losses as a result of co-infection by maize streak virus and maize stripe virus in Mauritius
Document Type(DT)Periodical article
Date of publication (DP)1992
Series (SE)Ann. app. Biol.
ISSN (SN)0003-4746
Source (SO)120, 443-450
Language of text (LT)En
Language of summaries (LS)En
Abstract (AB)The effect of co-infection by maize streak virus (MSV) and maize stripe virus (MStV) on plant growth and grain yield was investigated in a susceptible variety of maize (Zea mays), ZS 5206, in Mauritius. Under natural conditions MSV, transmitted by the leafhopper Cicadulina mbila, was normally established before MStV, which is vectored by the planthopper Peregrinus maidis; as a result, MStV symptoms were often partially or completely masked by those of MSV, making MStV detection by symptomatology very unreliable. MSV and MStV were diagnosed by ELISA and MStV by a novel method of detecting the MStV-coded non-capsid protein. The maize hybrid ZS 5206 was inoculated with either MSV, MStV or both, at two stages in the growth cycle (3-5 or 7-10 leaf stage). A greater reduction in plant growth was observed in plants inoculated singly with MStV (80 per cent and 29 per cent for first and second stage, respectively) than with MSV (50 per cent and 23 per cent, respectively). No cobs were produced by plants singly infected with MStV at the first stage, or co-infected with MSV and MStV at both stages; however, marginal grain production was recorded in plants singly infected with MSV at the first stage (91 per cent reduction) or infected with MSV or MStV, at the second stage (65 per cent and 80 per cent reduction, respectively). In maize hybrid ZS 5206, MStV is more virulent than MSV; co-infection by both viruses causes greater reductions in plant growth and grain yield than single infection by either virus at a given stage of plant development. In the event of co-infection by MSV and MStV, yield losses can be erroneously attributed to MSV only if the symptoms of MStV are masked by those of the former and if adequate methods for MStV detection are not used.
Descriptors - English (DE)MAIZE
PLANT VIRUSES
MAIZE STREAK VIRUS
PEREGRINUS MAIDIS
CICADULINA MBILA
DISEASES
ENZYME LINKED IMMUNOSORBENT ASSAY
MAIZE STRIPE VIRUS
ELISA
Descriptors - Geographic (DG)MAURITIUS
Sort Key 1(K1)Maize diseases
Date record entered (DA)1992-12-02
Language of analysis (LA)En
Affiliation (AF)Mauritius Sugar Industry Research Institute
Location (LO)LIB
Processing status (PS)CAT
MSIRI Staff (MS)PATH