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New Pest Response Guidelines - aphis - US Department of Agriculture

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Pathways<br />

Geographical Distribution<br />

Dendrolimus pini<br />

Currently found across Europe, Asia, and North Africa, Pine-tree lappet has a<br />

natural range that matches its primary host, Scots pine (Pinus sylvestris). Both<br />

temperate coniferous and mixed (coniferous and deciduous) forests are<br />

considered to be at risk for spread <strong>of</strong> PTL, within the United States. These<br />

forests make up a considerable portion (47%) <strong>of</strong> the U.S. forest, including the<br />

southern Appalachian mountain range, the Northeast, Midwest (Minnesota,<br />

Michigan, Wisconsin, North Dakota), the northwest regions <strong>of</strong> the United<br />

States and Alaska (Davis et al., 2008) (Refer to Potential Distribution on page<br />

2-11 and Figure 2-1 on page 2-9).<br />

Dendrolimus punctatus<br />

The Masson pine caterpillar occurs across southeastern Asia, including eastern<br />

China, Taiwan, and Vietnam (Billings, 1991; Chang, 1991; Matsumura,<br />

1926a). The northern limit is approximately 33 degrees latitude (Ya-Jie et al.,<br />

2005), with a western limit in China <strong>of</strong> Sichuan province (CABI, 2011b).<br />

Dendrolimus sibiricus<br />

At present, SSM is expanding its habitat, now occupying coniferous forest <strong>of</strong><br />

the Russian Plain (Gninenko, 2000) including China, Kazakhstan, Korea,<br />

Mongolia, and Russia (EPPO, 2005; Molet, 2012; Orlinskii, 2000). In<br />

connection with global processes <strong>of</strong> climate change, there is a risk <strong>of</strong> the<br />

expansion <strong>of</strong> this pest into northern and north-eastern regions <strong>of</strong> Siberia,<br />

including coniferous forests <strong>of</strong> Kamchatka and the Magadan region where it<br />

will be very difficult to control (CABI, 2011a). The pattern <strong>of</strong> movement <strong>of</strong><br />

this pest into forests <strong>of</strong> Eastern Europe is occurring naturally. The<br />

transportation <strong>of</strong> forest products, especially <strong>of</strong> round wood, has little influence<br />

on the rate <strong>of</strong> spread <strong>of</strong> SSM to new regions (CABI, 2011a).<br />

Dendrolimus superans<br />

The present worldwide distribution <strong>of</strong> SaSM is restricted to Japan (Hokkaido<br />

and Northern Honshu) (EPPO, 2005; Fukuyama, 1980; Maeto, 1991) and far<br />

eastern Russia, including the Sakhalin and Kurile Islands (Fukuyama, 1980)<br />

(Figure 2-1 on page 2-9).<br />

8-2 Dendrolimus Pine Moths 12/2012-01

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