- Cucurbit downy mildew (CDM) has been reported on cucumber throughout the state. All cucurbit growers should scout their fields on a regular basis and should add downy mildew specific fungicides to their regular maintenance program. CDM should be making the jump from cucumber to other cucurbit crops soon, if it hasn’t already done so. If you find CDM on cucurbits besides cucumber please let us know. Once plantings are done being harvested they should be disced under or hit with gramoxone immediately. To track cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/
- Cucurbit powdery mildew (CPM) This hot weather is ideal for cucurbit powdery mildew development. All growers should scout on a regular basis and continue with their regular maintenance programs. There are a number of fungicides available to control CPM. Please see the 2013 Commercial Vegetable Production Recommendations for more information. Organic cucurbit growers can apply OMRI-approved sulfur and other labeled products to help suppress CPM development.
