UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

OFFICE OF

PREVENTION, PESTICIDES, AND

TOXIC SUBSTANCES

			PC Code:	098301

			DP barcode: 	D344325

MEMORANDUM	September 14, 2007

Subject:	ADDENDUM to:  Aldicarb - Ecological risk results for
alternative application rate and incorporation efficiencies

To:	Robert McNally, Branch Chief

	Anne Overstreet, Team Leader

Special Review Branch

Special Review and Reregistration Division

From:		Dana Spatz, Chief (acting)	

Environmental Risk Branch II 

Environmental Fate and Effects Division 

In response to your request, the following addendum gives the risk
quotients for birds and mammals exposed to aldicarb applied at maximum
application rates and 99 percent granule incorporation efficiency.  This
analysis will help to characterize the aldicarb ecological risk
assessment.  Note that the risk quotients for aquatic species for this
scenario were previously provided in a memo to you dated August 25, 2006
(D331981). 

Table 1. Aldicarb: Acute avian RQs for 99 percent incorporation
efficiency at maximum application rates

Crop Scenario	

Bird Type



Rate

(lbs ai/A)	RQ

(99% incorporated)

Citrus

Broadcast

	Small Bird

Medium Bird

Large Bird	

4.95	51.7

8.1

0.57

Cotton

Banded/Sidedress

4” band width

40” row spacing	Small Bird

Medium Bird

Large Bird	

4.05	428.5

67.3

4.8

Dry Beans

Banded

6” band width

48” row spacing	Small Bird

Medium Bird

Large Bird	

2.1	175.5

27.6

1.9

Sorghum

Banded

2” band width

36” row spacing	Small Bird

Medium Bird

Large Bird	

1.05	192.6

30.3

2.1

Peanuts

Banded

6” band width

36” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	188.1

29.5

2.1

Pecans

Broadcast

	Small Bird

Medium Bird

Large Bird	

10.05	104.9

16.5

1.2

Potatoes

Banded

6” band width

38” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	198.5

31.2

2.2

Soybeans

Banded

6” band width

30” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	156.7

24.5

1.7

Sugar Beets

Banded

6” band width

22” row spacing	Small Bird

Medium Bird

Large Bird	

4.95	189.6

29.8

2.1

Sweet Potatoes

Banded

12” band width

48” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	124.8

19.6

1.4

Ornamentals

Broadcast

	Small Bird

Medium Bird

Large Bird	

5.0	52.2

8.2

0.58



Mallard duck LD50 = 1 mg/kg- bw

Rat LD50 = 0.9 mg/kg-bw

Table 2. Aldicarb: Acute mammalian RQs for 99 percent incorporation
efficiency at maximum application rates

Crop Scenario	Mammal Type



Rate

(lbs ai/A)	RQ

(99% incorporated)

Citrus

Broadcast

	Small Bird

Medium Bird

Large Bird	

4.95	17.5

9.2

0.75

Cotton

Banded/Sidedress

4” band width

40” row spacing	Small Bird

Medium Bird

Large Bird	

4.05	144.8

76.7

6.2

Dry Beans

Banded

6” band width

48” row spacing	Small Bird

Medium Bird

Large Bird	

2.1	59.3

31.4

2.5

Sorghum

Banded

2” band width

36” row spacing	Small Bird

Medium Bird

Large Bird	

1.05	65.1

34.5

2.8

Peanuts

Banded

6” band width

36” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	63.5

33.7

2.7

Pecans

Broadcast

	Small Bird

Medium Bird

Large Bird	

10.05	35.4

18.8

1.5

Potatoes

Banded

6” band width

38” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	67

35.5

2.9

Soybeans

Banded

6” band width

30” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	53

28

2.3

Sugar Beets

Banded

6” band width

22” row spacing	Small Bird

Medium Bird

Large Bird	

4.95	64

33.9

2.7

Sweet Potatoes

Banded

12” band width

48” row spacing	Small Bird

Medium Bird

Large Bird	

3.0	42.1

22.3

1.8



Ornamentals

Broadcast

	Small Bird

Medium Bird

Large Bird	

5.0	17.6

9.3

0.76



Mallard duck LD50 = 1 mg/kg- bw

Rat LD50 = 0.9 mg/kg-bw

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