Updated September 15: Sorghum producers are still battling the sugarcane aphid.
It was reported last week from fairly young sorghum in Houston County and from sugarcane in Cleburne Co. Kim Wilkins reported it in north Baldwin Co. a week or so ago and I forgot to add Baldwin to the map.
It is important to scout any young sorghum and apply an insecticide (chlorpyrifos) if needed. If high rates of this insecticide are applied, there is a 60-day pre-harvest interval.
Do not apply this insecticide to sweet sorghum.
How many aphids are too many? Advice from entomologists in Louisiana and Mississippi: Treat if more than 30% of the plants have at least one aphid AND there are an average 100-250 aphids per leaf.
