Performance of Tomicus yunnanensis and Tomicus minor (Col., Scolytinae) on Pinus yunnanensis and Pinus armandii in Yunnan, Southwestern China

Table 2

Feeding tunnels by Tomicus yunnanensis and T. minor in the caged shoots of Pinus armandii and P. yunnanensis in Kunming. Ten T. yunnanensis adults were released into each cage on July 28, and 10 T. minor adults were released into each cage on October 24. The data were collected on December 25, 2000 and are expressed as means ± 1SD. Means followed by the different letters in a column are significantly different at 𝑃<0.05 by 𝑡-test.

Tomicus species	Cages	Pinus species	Tunnel no cage^−1	Tunnel length (mm) cage^−1
T. yunnanensis	6	P. yunnanensis	16.5 ± 3.7 a	24.5 ± 19.5 a
	6	P. armandii	7.5 ± 3.3 b	7.9 ± 5.2 b
T. minor	3	P. yunnanensis	12.0 ± 2.0 a	16.1 ± 8.7 a
	3	P. armandii	11.0 ± 6.4 a	9.3 ± 3.3 b