Pesticide Concentrations in Vacuum Dust from Farm Homes: Variation between Planting and Nonplanting Seasons

Table 2

Atrazine spraying intervals for planting and nonplanting seasons.

	Planting season (April–July)			Nonplanting season (Nov-Dec)
	Interval (days)	No. of homes	% of homes	Interval^a  (days)	No. of homes	% of homes
Number of days between end of atrazine application and sample collection	0	4	12	188–190	7	22
	1-2	6	19	191–200	8	25
	3-4	6	19	201–210	2	6
	5-6	16	50	211–219	15	47
Number of days atrazine applied to cropland before sample collection	1-2	11	35	1-2	12	38
	3-4	9	28	3-4	3	9
	5-6	3	9	5-6	0	0
	>6	9	28	>6	0	0

^a Interval (days) in the nonplanting season represents the number of days between end of atrazine application in the planting season and sample collection in the nonplanting season.