Grain sorghum maturity ranges from boot to soft dough. Some fields are turning color. We are finding varying populations of Sorghum Midge in fields ranging from 0-5 per head. Treatment thresholds are 0.5-1 midge per head depending on the number of flowering heads per acre.
We are finding headworms in Refugio County sorghum fields ranging from 0-4 per head. Many of these are fall armyworms. The economic threshold for headworms ranges from 0.15 to 1 large worm (> 0.5 inch) per head. For medium worms (0.25-0.5 inch) the ET ranges 0.8 to 2 per head. If application is by air, you can almost double the ET.
In fields with worms, we are also finding leaf-footed bugs. For management, consider a leaf-footed bug as a stink bug. Rice stink bugs are still in low numbers. The threshold for treating stink bugs is from 0.5 to 0.85 per head. (0.75-1.25 if treating by air).
Sugarcane aphids are being found in sorghum fields of the Mid-Coast. Isolated fields toward Seadrift are seeing increasing numbers with spots in the field 50-60 feet across with excessive honeydew and aphids above 500 per leaf.
Check all fields as often as possible. Treat when aphid populations average 50-100 per leaf in post bloom sorghum. Spraying parts of a field where aphids are found may be an effective strategy.