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New Pest Response Guidelines - aphis - US Department of Agriculture

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Figure 3-4 Pine-tree lappet larva. (Jeroen Voogd, www.ukmoths.org.uk).<br />

Identification<br />

Pupae<br />

Larvae create spindle-shaped cocoons for pupation with variable coloration<br />

ranging from grey to brown. Cocoon length is between 45 to 54 mm and 15 to<br />

20 mm in diameter. Pupae are dark brown or reddish brown and measure on<br />

average 30 to 35 mm long and 9 to12 mm wide (Melis, 1940). Cocoons with<br />

female pupae are longer and wider than cocoons containing male pupae,<br />

averaging 54 ± 4.2mm in length and 19 ± 2.5mm in width compared to 47 ±<br />

2.6mm by 16 ± 2.0mm in males (Winokur, 1991). Blue thoracic hairs <strong>of</strong> the<br />

last instar larvae can be usually seen on the exterior surface <strong>of</strong> the newly spun<br />

cocoons (Melis, 1940).<br />

Figure 3-5 Pine-tree lappet cocoon containing pupa (Hannes Lemme,<br />

Bugwood.org)<br />

12/2012-01 Dendrolimus Pine Moths 3-5

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