About Us | Help Videos | Contact Us | Subscriptions
 

Members of ASA, CSSA, and SSSA: Due to system upgrades, your subscriptions in the digital library will be unavailable from May 15th to May 22nd. We apologize for any inconvenience this may cause, and thank you for your patience. If you have any questions, please call our membership department at 608-273-8080.

 

Institutional Subscribers: Institutional subscription access will not be interrupted for existing subscribers who have access via IP authentication, though new subscriptions or changes will not be available during the upgrade period. For questions, please email us at: queries@dl.sciencesocieties.org or call Danielle Lynch: 608-268-4976.

Abstract

 

This article in CS

  1. Vol. 13 No. 5, p. 531-535
     
    Received: Feb 23, 1973


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2135/cropsci1973.0011183X001300050011x

Effects of Maize Dwarf Mosaic Virus on Mechanically Inoculated Maize1

  1. C. F. Genter,
  2. C. W. Roane and
  3. S. A. Tolin2

Abstract

Abstract

Effects of maize dwarf mosaic virus (MDMV) on maize (Zea mays L.) were determined by growing selected inbred lines with diallel crosses among them in an area free of johnsongrass (Sorghum halepense L.). Mechanical inoculation with MDMV produced significant effects on grain yield and several other plant traits but the differences were small compared to those observed under natural infection. Two inbred lines, T8 and VALE8, did not react the same under conditions of natural and mechanical inoculation. Inoculated plants had more gray leaf spot, caused by Cercospora zeae-maydis (Tehon and Daniels), than uninoculated plants. In paired-row plots, maximum reduction was 34% for yield and 14% for plant height. Signitirant mean effects ou yield and moisture content of grain and days to silk were related to time of inoculation. One inbred line, H84, showed severe symptoms when inoculated 10 days after planting but showed mild symptoms when inoculated later. No cross that included Oh07B was measurably affected by MDMV. The most productive hybrid was Oh07B ✕ Oh43, a cross between a very resistant and a very susceptible inbred line. Resistance was dominant in Oh07B, but the intermediate resistance of T8 and VALE8 was recessive to susceptibility in Oh43 and Pa9l.

Stunting, leaf discoloration, barrenness, and severe loss of yield were not induced by mechanical inoculation and subsequent infection with MDMV. We concluded that MDMV is only a moderately destructive virus of maize; therefore, other agents must be contributing to the severely damaging syndrome in maize-johnsongrass associations.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .