Pipron^®

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Specimen Label

Safety Data Sheet

Registered States

Managing Powdery Mildew

It's as common on your plants as the soil around them. Powdery mildew. If conditions are right, it can go from one leaf to an epidemic in three or four days. It's always there, waiting for you to ignore it. Waiting to eat into your plants and profits. To keep that from happening, you must continually employ integrated disease control procedures against the spread and development of powdery mildew.

We hope to give you all the information you need to do just that.

Watching for conditions and telltale signs.

The first sign of powdery mildew is very hard to detect: Yellow spotting on leaves or tiny blistering on the leaves or flowers, caused by yet unseen lesions forming rapidly. Left unchecked, white lesions start appearing all over the leaves, stems or flowers. Spores by the hundreds are produced on the white mycelium (the thread-like body of the fungus) growing over the tissue, giving the disease the look of white powder.

Ideal conditions for infection:

• When greenhouse temperatures range from 65^° to 75^°F, and leaves become dampened by condensation (dew) at the end of the day.
• High relative humidity, crowded conditions and poor air circulation also help speed the development of this disease.

Taking control of the greenhouse environment.

Any control measures you take should be aimed directly at the prevention of powdery mildew development. For starters, you have to control what foes on in yours plants' environment, especially the greenhouse. First and foremost, you must stop condensation from forming on plant leaves at the end of the day.

Here's how.

Cultural practices to help prevent powdery mildew in the greenhouse:

1. Keep low velocity air moving over and through the foliage, especially at then end of the day.
2. If the relative humidity exceeds 90 percent, add some heat to the greenhouse as soon as possible, regardless of the outside temperature.
3. After the temperature inside the greenhouse begins to rise, ventilate for a few minutes to exhaust this warm, moisture-laden air and stop heating as you continue to cool the greenhouse for the night.
4. Repeating this dehumidification cycle two or three times at nightfall will go a long way toward preventing condensation-and the start of powdery mildew.