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

Table 3

Oviposition and brood development of Tomicus yunnanensis and T. minor in the logs of Pinus armandii and P. yunnanensis in laboratory condition, after 11 pairs of T. minor and 9 pairs of T. yunnanensis were introduced to each cage with two logs of P. yunnanensis or P. armandii. Gallery and brood production data were collected from three replicates. Larval tunnel gallery⁻¹ and gallery length were the mean from all the egg galleries appeared in the logs (number in the bracket). Data are expressed as means ± 1SD. Means followed by the different letters in a column are significantly different at 𝑃<0.05 by 𝑡-test.

Pinus species	Tomicus species	Galleries m^−2	Brood production m^−2	Larval tunnel gallery^−1	Gallery length cm
P. yunnanensis	T. yunnanensis	83.4 ± 12.4 a	1449.9 ± 96.3 a	29.1 ± 6.9 a	6.75 ± 4.2 a (68)
	T. minor	36.80 ± 14.6 b	338.6 ± 36.2 b	9.2 ± 3.1 b	6.18 ± 3.59 a (30)
P. armandii	T. yunnanensis	86.8 ± 9.1 a	1693.2 ± 166.7 a	22.4 ± 4.5 a	5.02 ± 2.50 a (68)
	T. minor	20.43 ± 7.6 b	268.2 ± 23.2 b	13.1 ± 2.2 b	4.08 ± 1.85 a (16)