Cucurbit crops, excluding pumpkins, are being harvested, with vigilance against downy mildew and Phytophthora pathogens. Downy mildew has been confirmed in 13 Michigan counties, affecting cucumber and melon crops. Phytophthora symptoms are expected to increase following recent rains, impacting plant crowns and fruit.
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Whitefly Damage on Cucurbit leaves
Unique silvering of the leaves is the characteristic symptom induced by feeding of immature stages of silver leaf whitefly which releases a toxin inducing the unique pattern on the leaves.
South Carolina Grower Update | August 12, 2024
As our late-summer and fall plantings get underway, keep in mind two cucurbit insect pests that worsen around this time: whiteflies and caterpillars.
South Carolina Grower Update | August 5, 2024
Winds and rain from Hurricane Debby may bring fungal spores or bacterial cells into fields in South Carolina. Before the rain starts, cucumber, cantaloupe, pumpkin, and watermelon crops should be sprayed with a fungicide to protect them from downy mildew
ONvegetables VCR | August 1, 2024
Phytophthora infections are being reported in watermelon, pumpkin and squash across the SW Ontario growing region. Once established in a field, there are no effective treatments that will control the spread. If the infection is limited to an isolated area, and has not begun to spread, destroying the infected plant may prevent further spread.
Cucurbit Downy Mildew updates August 1, 2023 | ipmPIPE
Michigan Cucurbit crop report – July 31, 2024
All Cucurbit crops are being harvested, except pumpkins.
Stay vigilant against downy mildew and Phytophthora pathogens. Downy mildew on cucumber has been confirmed in 13 Michigan counties across the major production regions.
Phytophthora crown and fruit rot symptoms can include blighting of the plant’s petioles and crown that lead to wilting. Fruit should not be harvested from regions of the field that are showing Phytophthora symptoms.
