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SLO County Rep Says Local Crops Survived Extreme Heat Temperatures in Early July

By Cole Pressler

After extreme heat temperatures recently hit the Central Coast, San Luis Obispo County farmers are saying they were able to protect their crops.

Temperatures reached the triple digits in parts of the Central Coast in early July, according to the National Weather Service. But, early weather forecasts helped farmers and vineyards prepare by pre-watering their crops.

Mark Lea is SLO County’s assistant agricultural commissioner. He said it’s the sunlight, not the heat, that damages crops, and that recent extreme weather has actually helped local products like wine grapes.

“The rains that we’ve had for the last couple years have made the plants really healthy and vibrant, so the canopies on the grape plants themselves are really good for the most part, so that’s going to help alleviate that problem,” Lea said.

While there may have been small-scale issues across the county, Lea said crops avoided widespread damage from the heatwaves.

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Sclerotinia and Lygus in Seed Canola: Field Update with George Lubberts, CCA | Enchant, Alberta

Video: Sclerotinia and Lygus in Seed Canola: Field Update with George Lubberts, CCA | Enchant, Alberta

Join Certified Crop Advisor George Lubberts for this Prairie Certified Crop Advisor (Prairie CCA) field update from Enchant, Alberta. In this 12th video of the series, George takes us into a seed canola field where the male rows have been removed and the female plants are filling pods. This video was taken in the third week of August 2025.

George discusses the early signs of sclerotinia stem rot, explaining how infection begins in the stem, impacts pod development, and leads to premature ripening. He also shares insights on lygus bug management, including timing of spray applications to minimize feeding damage and maintain seed size and quality.

With cool, damp summer conditions, George notes that while disease pressure is present, overall field health remains good. The crop is just beginning to show early seed colour change, signaling progress toward maturity.

Topics Covered:

•Sclerotinia stem rot identification and impact

•Managing lygus bugs in seed canola

•Crop stage and seed colour change observations

•Timing insecticide sprays for optimal protection

•Insights from a CCA field perspective in southern Alberta