gypsy moth caterpillar
Connecticut Agricultural Experiment Station Archive, Connecticut Agricultural Experiment Station,

Foundation Reports

STS Economic Brief [PDF 147K ]

The Gypsy Moth Slow the Spread program (STS) has successfully reduced the rate of spread of the gypsy moth. This destructive, non-native forest pest was introduced to the U.S. in 1869, and is currently established in all or parts of 19 states and the District of Columbia. In 2007, a revised economic analysis was completed to determine the economic feasibility of STS as it is implemented today. The objective of this analysis was to project and compare benefits and costs of STS for the next 20 years (2007 to 2026). The projected benefits of the STS program are at least 3 times as high as its costs. The total net present value (after subtracting costs) of implementing the STS project over the next 20 years (2007- 2026) is estimated to be between $184 and $348 million USD.
STS Project Brief [PDF 369K ]


The Gypsy Moth Slow the Spread (STS) Foundation establishes a formal framework for cooperation among the ten states who work with each other and the USDA to slow the spread of gypsy moth, Lymantria dispar (L.) (Lepidoptera: Lymantriidae),  Together they have achieved their goal of reducing spread of this destructive pest by more than 60%, which has prevented infestation of more than 140 million acres in 15 years.

Annual QA/QC Executive Summary [PDF 88K ]

The STS project completed the 2020 trapping season with overall project compliance to the protocols established in 1999 and agreed upon by the cooperating agencies of the project. In summary, the database generated trap sites within the STS project area for the 2020 season and traps were deployed at 98.74% of the planned sites (57,688 traps were placed).
2020 Annual Report [PDF 126K ]

States located along the leading edge of gypsy moth populations have cooperatively worked with the USDA Forest Service to implement a project to slow the spread of the gypsy moth. This work has been ongoing since Congress funded the strategy in the year 2000.
2019 Annual Report [PDF 586K ]
2018 Annual Report [PDF 408K ]

2017 Annual Report [PDF 425K ]

2016 Annual Report [PDF 425K ]

2014 Annual Report [PDF 489K ]

2013 Annual Report [PDF 488K ]

2012 Annual Report [PDF 499K ]

2011 Annual Report [PDF 171K ]

2010 Annual Report [PDF 336K ]

2009 Annual Report [PDF 175K ]

2008 Annual Report [PDF 120K ]

2007 Annual Report [PDF 710K ]

2006 Annual Report [PDF 225K ]

2005 Annual Report [PDF 147K ]

2004 Annual Report [PDF 139K ]

2003 Annual Report [PDF 145K ]

2002 Annual Report [PDF 67K ]

2001 Annual Report [PDF 164K ]

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