Ground Cover Supplement : GC Supplement - Frost
11 Identifying frost if affected, the heads will feel soft and spongy when squeezed between thumb and forefinger. it is important to note that frosted paddocks can contain all of the symptoms detailed below because earlier cold damage may go undetected until a serious frost prompts a paddock inspection. HEALTHY AND FROSTED GRAIN HEALTHY ENDOSPERM (ABOVE) AND FROSTED ENDOSPERM (BELOW) Sound grain Frosted grain. Frosted grain is pinched and creased along the long axis (as if long-nosed pliers have crimped the grain). Creases are regular not random. Grain may have a blue/grey appearance. HEALTHY (NON-FROSTED) BRIGHT YELLOW ANTHERS Peel back the husk to inspect the condition of the floral organs in the head. FROSTED BANANA- SHAPED ANTHER Pollen sacs (anthers) are normally bright yellow, but become dry, banana-shaped and turn pale yellow or white following frost. FROST-AFFECTED STEMS a pale green to white ring on the stems of plants indicates they have been frost-affected. With good soil moisture crops can develop grain even with frost- damaged stems – but it is important to monitor for two weeks after the frost event.
GC Supplement - Profit from crop nutrition 2013
GC Supplement - Cereal foliar fungal diseases