Soil-based Phytophthora Management Strategies

Since many Phytophthora diseases are soil-borne, soil-based fungicides such as TerraClean can provide effective Phytophthora relief, particularly when applied preventatively, before the onset of disease.

TerraClean’s unique scientific formula features several highly-concentrated organic acids that are designed to penetrate soil and chemically react with many common plant pathogens including:

  • Phytophthora
  • Pythium
  • Verticillium
  • Fusarium
  • Rhizoctonia
  • Thielaviopsis

As TerraClean reacts with soil-borne pathogens, it also releases oxygen into the soil, stimulating root development and plant growth through increased oxygenation of the root zone and nutrient intake.

TerraClean’s key benefits include:

  • Zero-Hour re-entry interval
  • EPA-Certified
  • Environmentally safe and fully biodegradable

Can be applied any time from seed to harvest.


Foliar Phytophthora Management Strategies

Foliar fungicides like OxiDate are also an integral part of any Phytophthora management program.  OxiDate’s breakthrough scientific formula oxidizes rapidly on foliar contact to prevent and control several common pathogens including:

  • Phytophthora
  • Pythium
  • Early Blight
  • Late Blight
  • Downy Mildew
  • Powdery Mildew
  • Fusarium

OxiDate has several key benefits, including:

  • EPA-Registered
  • No mutational resistance
  • Apply from seed to harvest
  • OMRI-approved for use with organic production
  • Fully biodegradable and environmentally friendly

Use as a foliar spray, surface disinfectant, soil drench, and pre-plant dip.

Phytophthora: Soil Disease Identification and Treatment

Phytophthora diseases are soil-borne and based and fungal in nature. They can cause wide-spread problems in plants. However, if crops are monitored and treated effectively, Phytophthora can be controlled.

There are several different types of Phytophthora, including Cinnamomi, Ramorum, Infestans, Capsici and Palmivora. They are known to attack a wide range of plants including pumpkins, watermelons, beans, spinach, turnips and even olive trees.

Signs and Symptoms

Phytophthora Cinnamomi is the most common, destructive and widely distributed species of this disease. It is present in over 70 countries world wide. The pathogen is generally found in areas where the average annual rainfall is greater than 50mm and soils are acidic or neutral and low on nutrients and organic matter. Poor drainage also encourages infection.

Phytophthora Cinnamomi lives in soil and plant tissues. It destroys the structure of root tissues, causing root rot and preventing plants from absorbing water and nutrients. Early symptoms include wilting, yellowing and retention of dried foliage as well as darkening of root colour. If not caught quickly, infection often leads to the death of plants, especially in dry summer conditions.

Phytophthora Ramorum can cause “sudden death” in oak trees. For such massive plants they can decline rapidly, with foliage turning brown in a few weeks. Under moist conditions, spores develop that can spread the disease. Once contracted, it kills portions of bark, resulting in cankers or lesions. The best way to distinguish it is to look for symptoms on other known hosts, such as rhododendrons and bay trees, nearby. If signs are seen on other susceptible plants, they are likely to be stricken with Phytophthora Ramorum.

Phytophthora Infestans causes significant losses in potato crops around the world. It is probably the most significant pathogen of potatoes and tomatoes today. The disease appears as leaf rot or lesions, rot in potatoes themselves, and slightly sunken brown and purple areas.

Other forms of the disease include Phytophthora Capsici, which materializes in the form of water-soaked foliar lesions and stem necrosis and Phytophthora Palmivora, a dark-staining canker. While Capsici is known to affect beans and peas, Palmivora has been witnessed in olive trees and orchids.

Prevention and Treatment

With so many varieties of Phytophthora and types of vulnerable plants, it is important to monitor crops regularly and treat them thoroughly if disease is suspected.  Because the pathogen is soil-based, an effective treatment is the application of TerraClean.

TerraClean is popular because it is environmentally safe and biodegradable. It can be applied at any time, whether as a pre-plant dip, a soil drench, a surface disinfectant or even a foliar spray. While it will eradicate the disease, it will also increase oxygenation at the roots and improve nutrient intake in plants.

With Phytophthora’s ability to attack many common crops and cause crippling losses, it is imperative to recognize the signs of the disease and treat it quickly.


Phytophthora Can Cause Crippling Losses

Phytophthora blight is without doubt one of the most dangerous threats to cucurbit and solanaceous crops worldwide, capable of destroying entire crops of pumpkin, squash, watermelon, honeydew melon, cantaloupe, eggplant, cucumber, tomato, peppers, lima beans, spinach, turnip, and many more.  An aggressive, fast-spreading disease, Phytophthora blight has become much more prevalent and severe in recent years, particularly in the US where outbreaks have threatened the very survival of the processing pumpkin industry.

Various other Phytophthora diseases have historically caused staggering economic losses on a wide variety of crops worldwide, most notably soy beans and potatoes.