90 • FIELDWORKER SAFETY
Restricted-Entry Interval Adjustments
The restricted-entry interval adjust- ments described below and in Sidebar 7 can be made only to restricted-entry intervals found in the regulations, not to those prescribed on the pesticide label.
Restricted-entry intervals may change from time to time. Read the pesticide label or consult your county agricultural commissioner for current information.
Shortening the Restricted-Entry Interval. With prior authorization from the county agricultural commissioner, restricted-entry intervals can be shortened as follows:
When there is no foliage on the plant that has been treated, and when any crop cover or weed cover in the treated area is not over four inches in height, the re- stricted-entry interval can be reduced by 50 percent, but in no case to less than the label-specified restricted-entry interval.
When the pesticide label requires you to adjust the restricted-entry interval if you make outdoor applications in a geographical area
that averages less than 25 inches of rain annually, you must observe the label’s special restricted-entry interval requirements for these dry areas. But, if you can present your county agricultural commissioner with valid rainfall data from an official government source show- ing that the area in your county where you want to apply pesticides averages 25 inches of rain or more annually, your agricultural com- missioner is allowed to shorten the restricted-entry interval.
Warning and Posting Requirements
When property is used for commer- cial or research production of an agricultural commodity, property operators must assure that their employees, including the employees of any contractor they hire, are notified of all scheduled pesticide applications. Property operators must give the notification prior to the application
to any person in the field
to any person likely to enter during the application
to any person who may enter during the restricted-entry interval
to any employee who walks within 1/4 mile of the treated field
Restricted-Entry Interval Adjustments: An Example
To determine what the restricted-entry interval should be when you are applying a mixture of two or more organophosphate pesticides with differing restricted-entry intervals, add 50 percent of the next longest restricted- entry interval to the longest restricted-entry interval. For example, when treating a crop with a combination of Pesticide A and Pesticide B, the restricted- entry interval would be 15 days:
Pesticide A—14 days Pesticide B—2 days
50% of 2 days = 2 x .5 = 1 14 + 1 = 15 days