United States Department of Agriculture
U.S. Forest Service
Caring for the land and serving people

Lymantria dispar Digest

Suppression

Acres Treated by Year for Program

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The following are Suppression treatment data by year for 1970 through 2020.
Year Bt Dimilin Gypchek Sevin Dylox Mimic Other Total All
1970 0 0 0 84,469 38,049 0 0 122,518
1971 0 0 0 94,310 0 0 0 94,310
1972 0 0 0 75,229 0 0 0 75,229
1973 0 0 0 47,443 43,484 0 0 90,927
1974 0 0 0 69,753 104,258 0 0 174,011
1975 0 0 0 13,808 29,982 0 0 43,790
1976 0 0 0 38,634 0 0 0 38,634
1977 0 0 0 19,633 76,513 0 0 96,146
1978 0 0 0 34,514 135,166 0 0 169,680
1979 0 0 0 41,536 10,941 0 0 52,477
1980 16,963 0 0 18,517 44,814 0 0 80,294
1981 22,437 0 0 117,085 210,598 0 0 350,120
1982 67,324 77,918 0 160,242 421,246 0 0 726,730
1983 475,898 46,500 0 71,468 4,794 0 0 598,660
1984 218,315 252,778 0 37,040 4,072 0 0 512,205
1985 270,226 247,369 0 2,192 0 0 0 519,787
1986 219,323 361,153 0 8,755 0 0 0 589,231
1987 318,849 375,872 0 3,704 0 0 0 698,425
1988 276,050 473,430 48 0 0 0 0 749,528
1989 413,318 384,068 450 0 0 0 0 797,836
1990 851,532 665,173 2,152 0 0 0 0 1,518,857
1991 738,313 363,427 1,776 0 0 0 0 1,103,516
1992 659,536 288,664 12,576 0 0 0 0 960,776
1993 372,168 206,522 3,520 0 0 0 0 582,210
1994 345,858 268,072 4,915 0 0 0 0 618,845
1995 271,961 161,231 2,127 0 0 0 265 435,584
1996 201,540 111,362 791 0 0 0 0 313,693
1997 46,703 16,447 4,367 0 0 0 0 67,517
1998 91,672 757 3,956 0 0 0 180 96,565
1999 153,198 5,275 2,306 0 0 0 0 160,779
2000 227,688 18,090 5,882 0 0 0 0 251,660
2001 274,057 187,784 2,280 0 0 0 0 464,121
2002 149,772 131,601 4,794 0 0 0 0 286,167
2003 67,895 25,124 10,015 0 0 0 0 103,034
2004 73,493 0 6,078 0 0 0 0 79,571
2005 7,292 0 0 0 0 0 0 7,292
2006 145,053 18,000 602 0 0 0 0 163,655
2007 161,887 28,424 1,389 0 0 0 0 191,700
2008 450,528 90,155 2,268 0 0 0 0 542,951
2009 291,508 26,586 3,478 0 0 0 0 321,572
2010 5,668 0 401 0 0 0 0 6,069
2011 2,567 0 600 0 0 0 0 3,167
2012 2,842 0 0 0 0 0 0 2,842
2013 54,285 0 2,052 0 0 3,777 0 60,114
2014 7,391 75 628 0 0 677 0 8,771
2015 27,381 0 1,130 0 0 6,245 0 34,756
2016 107,816 0 500 0 0 60,008 0 168,324
2017 32,870 0 0 0 0 22,106 0 54,976
2018 13,823 0 895 0 0 12,043 0 26,761
2019 3,363 0 0 0 0 0 0 3,363
2020 168 0 0 0 0 0 0 168
Total 8,138,531 4,831,857 81,976 938,332 1,123,917 104,856 445 15,219,914
Note: Total treatments acres do not include the number of acres treated more than once. All acres include all Ownership/Funding Types.
Source: USDA Forest Service Lymantria dispar Digest 2.1.01 released on 1/12/2022.