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Dry conditions limit herbicide power

After a rapid planting season, farmers were happy to get an early start on spraying. Rains helped early applications, but other farmers were not so lucky.

Eric Wilson, agronomy manager with Wyffels Hybrids, said there were many farmers with lots of replant to do after hail came through central Iowa in early May. But with a dry forecast for early June, it may be more difficult to get those activating rains for herbicide.

“It’s been a tale of two worlds,” he said. “Some places just got absolutely pounded with rains, but we’ve been dry too. The question of ‘if we got activation’ is a tough one to answer broadly.”

In a year when speed has been the theme to planting, supply hasn’t been much of a problem for farmers, whether it’s herbicide or post-plant fertilizer.

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LALEXPERT: Sclerotinia cycle and prophylactic methods

Video: LALEXPERT: Sclerotinia cycle and prophylactic methods

White rot, also known as sclerotinia, is a common agricultural fungal disease caused by various virulent species of Sclerotinia. It initially affects the root system (mycelium) before spreading to the aerial parts through the dissemination of spores.

Sclerotinia is undoubtedly a disease of major economic importance, and very damaging in the event of a heavy attack.

All these attacks come from the primary inoculum stored in the soil: sclerotia. These forms of resistance can survive in the soil for over 10 years, maintaining constant contamination of susceptible host crops, causing symptoms on the crop and replenishing the soil inoculum with new sclerotia.