The amended risk assessment that PMRA conducted included many assumptions regarding agronomic practices that are inaccurate and/or outdated and are not indicative of how chlorothalonil is used in modern fruit production. These assumptions led PMRA to inappropriate conclusions related to chlorothalonil use and occupational/worker exposure.
The purpose of this important survey is to gather information on how growers actually use of chlorothalonil fungicide for disease control in fruit and to correct the assumptions that PMRA used in their risk assessment. Providing this information to the PMRA is critical so that they can revise their risk assessment to reflect actual grower use of chlorothalonil that potentially could ease the extreme risk mitigation measure they have proposed. Chlorothalonil fungicide is marketed in a number of formulations either alone, in a premixed product with another fungicide, or in a co-pack with another fungicide for use on fruit. The most common registered chlorothalonil products available for use in Canada are reported below.