In general, manure application on any crops is not advised. See below for advice on avoiding overflowing manure pits.
What is the concern with spreading manure now? Although a manure application now, under the most favourable conditions, may lead to a growth spurt of grass (Fig. 1), most of the nitrogen in manure that would be spread now will be leached and lost from the soil during the cold, rainy season, before the grass can use it (Fig. 2). Advice: don’t just feed the microbes, feed the crop by waiting to apply manure.