Agronomic Crops

Sorghum
Midges
Insecticide
Foliar sprays
b-cyfluthrin (P)
Baythroid XL 1EC
Amount of
Formulation per Acre
1.0 – 1.3 oz.
Pounds Active
Ingredient per Acre
0.008 – 0.01
Acres 1 Gallon or
1 Pound Dry Will Treat
128 – 98.5
Threshold and Comments
chlorantraniliprole,
λ-cyhalothrin (D + P)
Besiege
5 – 6 oz.
16 – 21
Preharvest interval is 30 days.
cyfluthrin (P)
Tombstone 2EC
1.0 – 1.3 oz.
0.016 – 0.02
128 – 98.5
deltamethrin (P)
Battalion 0.2EC
Delta Gold 1.5EC
9.6 – 14.1 oz.
1.3 – 1.9 oz.
0.015 – 0.022
0.015 – 0.022
13.3 – 9
98.5 – 67.4
dimethoate (OP)
Dimethoate 4EC
0.25 – 0.5 pt.
0.125 – 0.25
32 – 16
esfenvalerate (P)
Adjourn 0.66EC
Asana XL 0.66EC
2.9 – 5.8 oz.
2.9 – 5.8 oz.
0.015 – 0.03
0.015 – 0.03
44 – 22
44 – 22
gamma-cyhalothrin (P)
Declare 1.25
0.77 – 1.28 oz.
0.0075 – 0.0125
166 – 100
λ-cyhalothrin (P)
Karate Z 2.08CS
Lambda-Cy 1EC
Silencer 1EC
Tiaga Z 1CS
Warrior Z 1CS
0.96 – 1.28 oz.
1.92 – 2.56 oz.
1.92 – 2.56 oz.
1.92 – 2.56 oz.
1.92 – 2.56 oz.
0.015 – 0.02
0.015 – 0.02
0.015 – 0.02
0.015 – 0.02
0.015 – 0.02
133.3 – 100
66.7 – 50
66.7 – 50
66.7 – 50
66.7 – 50
methomyl (C)
Lannate 2.4LV
12 – 24 oz.
0.225 – 0.45
10.6 – 5.3
Z-cypermethrin (P)
Mustang Max 0.8EC
1.28 – 4.0 oz.
0.008 – 0.025
100 – 32
Z-cypermethrin (P),
chlorpyrifos (OP)
Stallion
3.75 – 11.75
34.1 – 10.9
soRGHUM MIDGe larvae overwinter inside cocoons spun within the spikelets of sorghum, Johnsongrass, or other hostplant
residue. Time and percentage of emergence in the spring are influenced by temperature, cultural practices, and other factors.
e adult sorghum midge is a small orange fly. e edges of its wings appear fringed under magnification. e female lives 1
day, laying 30 to 120 eggs, one at a time, in the glume. About 90 percent of the eggs are laid during the 4 days after plant-head
emergence. e life cycle of the midge requires approximately 14 to 18 days. e male midge lives only a few hours.
Damage: Sorghum is susceptible to damage from the midge only during the bloom period. Once blooming begins, an individual
head is susceptible to damage for 4 to 9 days. Adult midges do not damage the grain. Females deposit eggs between the glumes
of a floret. Larvae destroy the seed, resulting in blanks or shriveled seed coats that appear discolored. Heads with severe damage appear
small and compressed with blank areas. Planting grain sorghum between April 15 and May 10, as uniformly as possible (depth
and date), helps control sorghum midges.
tHResHoLD: treat when you find one adult midge per head when fields reach 20 to 30 percent bloom. scout fields daily
during the bloom period from midmorning until shortly after noon. Make midge applications as early in the morning or
late in the evening as possible to avoid foraging honey bees during pollen shed.
Grain Sorghum 67