What to do with white mold in soybeans?

What to do with white mold in soybeans?

Chemical Control Options. Especially in fields where white mold has been an issue previously, it is critical to use management options such as product selection, crop rotation and reduced tillage. An in-season fungicide application, such as Delaro® Complete Fungicide, can help manage white mold.

What does white mold in soybeans look like?

Caused by the fungus Sclerotinia sclerotiorum, white mold is often recognized by fluffy, white growth on soybean stems. Initial symptoms generally develop from R3 to R6 as gray to white lesions at the nodes. Lesions rapidly progress above and below the nodes, sometimes girdling the stem.

Which disease of soybean causes black and brown discoloration of seed?

Typically, anthracnose is a late season stem and pod disease of soybean. Symptoms occur on stems, pods and petioles as irregularly shaped, light to dark brown spots, streaks or lesions. Eventually black fungal structures may be evident in these lesions. Anthracnose may also cause a tipblight.

What causes soybean pods to turn black?

The seeds become infected when their fungal spores penetrate the pod. Infected plants are generally identifiable by the black specks that appear in rows on the stems and scattered over the pods or zone lines within cortical tissues (Figure 3).

What causes sudden death in soybeans?

Sudden death syndrome is caused by a soil-borne fungal pathogen which invades the roots and lower stem of the soybean plant, producing toxins that are taken up into the leaves and cause symptoms. Disease that develops early in the season may result in aborted flowers and young pods, resulting in significant yield loss.

What kills Sclerotinia?

Bayer’s Ella Crawford says Aviator (bixafen + prothioconazole) provides the most effective control of Sclerotinia as well as other important diseases, such as light leaf spot.

What is Phytophthora in soybeans?

Phytophthora sojae is a fungal-like pathogen that survives in soil in the form of oospores for up to five to 10 years. The oospores are produced in infected plant tissue as it decomposes. Soybean is the only known crop host for this pathogen. This pathogen is most active and causes most damage in wet soils.

What is pod blight?

Pod and stem blight is characterized by black, raised specks that appear in linear rows on mature soybean stems. These specks are fungal reproductive structures known as pycnidia. Pycnidia can also cover pods, but they may not follow the linear pattern seen on stems. These signs are most prevalent from R6 through R8.

What causes phomopsis in soybeans?

Diaporthe (formerly Phomopsis) seed decay is caused by the fungus Diaporthe longicolla, and can greatly affect seed quality. Diaporthe-infected seed are cracked and shriveled and are often covered with chalky, white mold. If infected seeds are planted, emergence may be low due to seed rot or seedling blight.

How harmful is white mold?

Among the health issues white mold can cause include allergies, eye irritation, skin irritation, headaches, respiratory infections, nausea, and dizziness. Prolonged exposure can lead to even more severe problems, such as anxiety, depression, insomnia, and memory loss.

What does sudden death in soybeans look like?

Symptoms first appear as small, pale green to yellow circular spots on the leaves during late vegetative or early reproductive growth stages. As the disease progresses, the areas between the leaf veins will first turn bright yellow, then eventually brown, with the veins remaining green.

What does Sudden Death Syndrome look like on soybeans?

The first symptoms are typically on leaves in late July or early August in the Midwestern U.S. Leaf symptoms often begin as scattered yellow, diffuses pots between veins. The spots typically expand between veins to become brown lesions surrounded by chlorotic areas, and the leaves may be cupped or curled.

How do I get rid of Sclerotinia stem rot?

Fungicides are the most effective management tool to control sclerotinia stem rot in canola when the risk of infection is high.

What causes Sclerotinia stem rot?

Sclerotinia stem rot, also referred to as white mold, is caused by the fungal pathogen Sclerotinia sclerotiorum. The fungus survives from year to year as hard dark structures called sclerotia. Sclerotia are variously shaped bodies of tightly packed white mycelium covered with a dark, melanized protective coat.

What causes root rot in soybeans?

The pathogen that causes Phytophthora damping-off, root, and stem rot of soybean is Phytophthora sojae. This is a water mold and produces oospores in infected plants.