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Proceedings of the Fifth Asian Regional Maize Workshop - Search ...

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Tseng, C.T., and Y.Z. Wu. 1990a. The integrated control <strong>of</strong> <strong>the</strong> <strong>Asian</strong> corn borer, Ostriniae<br />

furnaca7is Guenee, on sweet corn. Plant Prot. Bull. 32: 177-182.<br />

Wenkert, W., N.R. Fausey, and H.D. Watter. 1981. Flooding response in Zea mays L. Plant and<br />

Soil 62: 351-366.<br />

Questions to <strong>the</strong> author:<br />

FROM: G. Granados<br />

Q One <strong>of</strong> <strong>the</strong> better known sources <strong>of</strong> resistance to corn borers in tropical and<br />

maize is Antigua Gr.1, but Antigua germp1asm is very susceptible to downy mildew.<br />

reason some people talk about a negative correlation between resistance to mildew and<br />

to corn borer. Have you detected any kind <strong>of</strong> correlation between resistance to <strong>the</strong>se<br />

factors?<br />

A So far in our maize hybrid breeding program, <strong>the</strong>re is not any evidence shown that<br />

subtropical<br />

For this<br />

resistance<br />

2 stress<br />

positive correlation between resistance to corn borer and downy mildew exists. However, this<br />

an interesting question. We would like to look at more different sources <strong>of</strong> resistance<br />

compare <strong>the</strong> correlation between <strong>the</strong>se two stress factors.<br />

FROM: P. Grudloyma<br />

Q COuld you please tell me how long you flood <strong>the</strong> corn plant in <strong>the</strong> paddy field for<br />

screening to waterlogging resistance?<br />

A In our maize hybrid breeding program for screening waterlogging resistance <strong>the</strong> plots are<br />

to be flooded for 5to 6 days when plants are at 5th or 6th leaf stage.<br />

<strong>the</strong><br />

is<br />

to<br />

129

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