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Wheat Pests and Diseases Control
2021/4/8 11:19:36

Wheat Pests and Diseases Control

Wheat is one of the most important food plants in the world. There are some common pests and diseases for wheat, and some products recommended to control wheat pests and diseases. 

Wheat scab



Scab starts as small water-soaked spots on glumes. These brownish spots spread in all directions on the head and can start in the middle, at the base, or at the top of the head. Eventually the entire head can appear bleached. During humid conditions, a white or pink fungal growth with orange spore masses may develop on glumes.

Recommended products

Prochloraz 45% EC  75-100 mL/100 L water

Thiophanate-methyl 70% WP  175-250 g/100 L water

Tebuconazole 20% + Pyraclostrobin 10% SC  50-70 mL/100 L water

Tebuconazole 133 g/L + Prochloraz 267 g/L EW  50-70 mL/100 L water

Wheat stripe rust



The first sign of stripe rust is the appearance of yellow streaks. Mature pustules break open and release yellow-orange masses of spores. In some varieties, long, narrow yellow stripes will develop on leaves. The infected tissues may become brown and dry as the plant matures or becomes stressed. Severe early infection can result in plant stunting.

Recommended products

Propiconazole 25% EC  40-100 mL/100 L water

Tebuconazole 430 g/L SC  40-65 mL/100 L water

Difenoconazole 15% + Propiconazole 15% EC  50-100 mL/100 L water

Crown and foot rot



Root, crown, and foot rot symptoms include dark brown lesions on primary and secondary roots. Under humid conditions, the interior of infected crowns will be spongy and heavily decayed. Pink, cottony fungal growth may be evident inside lower portions of infected stems.

Recommended products

Fludioxonil 2.5% FS  100-200 mL/100 kg seeds

Azoxystrobin 250 g/L SC  100-200 mL/100 L water

Metalaxyl 8% + Mancozeb 64% WP  350-500 g/100 L water

Azoxystrobin 200 g/L + Difenoconazole 125 g/L SC  40-70 mL/100 L water

Powdery mildew



Powdery mildew is characterized by a powdery white to gray fungal growth on leaves, stems and heads. As the plant matures, the white powdery growth changes to a grey-brown color. The leaf tissue on the opposite side of the leaf from the white mold growth becomes yellow, later turning tan or brown.

Recommended products

Pyraclostrobin 25% SC  75-125 mL/100 L water

Difenoconazole 25% EC  40-100 mL/100 L water

Tebuconazole 20% + Pyraclostrobin 10% SC  50-70 mL/100 L water

Difenoconazole 15% + Propiconazole 15% EC  50-100 mL/100 L water




Feeding by aphids may cause two types of damage: 1) Plants may be damaged by aphids feeding on the plant and 2) damage may result from the aphids moving a plant virus, primarily Barley Yellow Dwarf Virus, into the plants.

Recommended products

Acetamiprid 20% SP  15-25 g/100 L water

Abamectin1.8% + Acetamiprid 3% EC  35-50 mL/100 L water

Thiamethoxam 12.6% + Lambda-cyhalothrin 9.4% SC  15-25 mL/100 L water

Wheat midge



Crop damage occurs during the larval stage. After hatching, the midge larvae feed on the developing wheat kernel, causing it to shrivel, crack and become deformed. As there are no visible, external changes in color, size or shape of the affected wheat head, damage can only be detected by inspecting the developing seed within the glumes.

Recommended products

Chlorpyrifos 480 g/L EC  120-250 mL/100 L water

Lambda-cyhalothrin 2.5% EC  35-70 mL/100 L water

Imidacloprid 70% WG  5-15 g/100 L water




Armyworm adults lay their eggs in large clusters on rich vegetation. Feeding on wheat heads at night is most common. Characteristic damage is indicated by a small hole bored in the base of florets.

Recommended products

Emamectin benzoate 5% WG  20-50 g/100 L water

Indoxacarb 15% SC  35-75 mL/100 L water

Chlorfenapyr 10% + Emamectin benzoate 2% SC  20-80 mL/100 L water

Wheat mites



Damages wheat plants by destroying plant cells as it feeds, causing a stippling of the leaves. Brown wheat mites have a tendency to feed on the tips of the leaves, causing them to dry out and die. Heavily infested fields present a scorched, withered appearance.

Recommended products

Pyridaben 15% EC  35-50 mL/100 L water

Spirodiclofen 240 g/L SC  30-50 mL/100 L water

Abamectin 4%+ Etoxazole 16% SC  15-25 mL/100 L water

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