Oviposition site selection by Japanese gypsy moth (Lymatria dispar japonica) in a warm-temperate secondary forest in western Japan

Figures & data

Table 1. Tree species composition and occurrence of egg masses in the research plot.

Species	Abbreviation	Number of individual trees	DBH (cm) (mean ± s.d.)	Basal area (cm^2/ha)	Number of individual trees with egg masses	Ovipositing rate (%)	Number of egg masses	Ovipositing preference (%)
Quercus phillyraeoides	Qup	62	9.8 ± 6.2	72439
Eurya japonica	Euj	59	1.9 ± 1.3	2673
Camellia japonica	Caj	55	2.4 ± 3.3	8082	41	74.5	151	76.6
Lyonia ovalifolia var. elliptica		16	4.8 ± 2.2	3914
Quercus glauca	Qug	13	6.3 ± 4.7	7085	7	53.8	16	8.1
Ilex pedunculosa	Ilp	12	12.3 ± 3.2	16835	1	8.3	1	0.5
Photinia glabra	Phg	11	1.5 ± 2.1	634	6	54.5	11	5.6
Quercus serrata		10	19.8 ± 8.1	39923
Evodiopanax innovans		8	6.7 ± 4.1	4281
Rhododendron reticulatum		8	2.1 ± 0.6	329
Clethra barvinervis		7	8.9 ± 2.0	5103
Castanopsis cuspidata	Cac	6	16.0 ± 10.5	19222	1	16.7	1	0.5
Prunus verecunda		6	15.2 ± 7.1	14634
Osmanthus heterophyllus	Osh	5	0.9 ± 0.9	71
Ilex integra	Ili	3	5.5 ± 5.3	1533	2	66.7	6	3.0
Pourthiaea villosa var. laevis		3	5.0 ± 4.1	1094
Dendropanax trifidus	Det	3	5.9 ± 2.2	1025	2	66.7	3	1.5
Fraxinus sieboldiana		3	5.2 ± 2.7	896
Ligustrum japonicum	Lij	3	3.0 ± 1.3	286	1	33.3	1	0.5
Quercus salicina	Qus	3	1.9 ± 1.8	184
Abelia spathulata		3	1.3 ± 0.6	56
Myrica rubra	Myr	2	41.6 ± 19.1	36447
Pieris japonica		2	6.1 ± 0.7	658
Vaccinium bracteatum	Vab	2	2.7 ± 0.0	126
Rhododendron macrosepalum		2	0.2 ± 0.2	1
Quercus variabilis		1	26.4	6079
Carpinus laxiflora		1	8.2	586
Daphniphyllum teijsmannii		1	1.3	14
Viburnum wrghtii		1	1.2	13
Rhus trichocarpa		1	1.0	9
Cleyera japonica	Clj	1	0.9	8	1	100.0	7	3.6
༴ernstroemia gymnanthera		1	0.8	5
Viburnum erosum var. punctatum		1	0.5	2
Rhododendron serpyllifolium		1	0.05	0.02
Total		316		244246	62	19.6	197	100.0

Notes: Species are listed in order of decreasing abundance (number of individual trees) and decreasing basal area (BA).

Species names in bold indicate evergreen species.

The species with abbreviations represent the species whose leaves were sampled. Diameter at breast height (DBH) and height are the species mean ± SD.

Ovipositing rate is the percentage of individual trees of each species with egg masses present.

Ovipositing preference is the percentage of the total number of egg masses in the plot found on each species.

Figure 1. Boxplots of leaf area (A) and leaf dry mass (B) for 15 evergreen tree species in the research plot.

Figure 2. Egg masses of Japanese gypsy moth laid on the abaxial surface of a Camellia japonica leaf (A) and over two overlapping leaves of Castanopsis cuspidata (B). These egg masses were deposited in 2012 and the photos were taken in September–October 2013.

Table 2. Morphological attributes of leaves (mean ± SD) with egg masses present/absent.

Leaf attribute	Eggs present	Eggs absent	F	P
Area (cm^2)	28 ± 21	23 ± 18	5.54	0.020
Length (cm)	9.3 ± 2.2	8.0 ± 2.3	5.17	0.024
Width (cm)	4.3 ± 2.0	4.1 ± 2.0	3.98	0.047
Thickness (mm)	0.33 ± 0.08	0.33 ± 0.09	0.01	0.931
Dry mass (g)	0.33 ± 0.15	0.25 ± 0.13	6.93	0.009
LMA (g m^−2)	126 ± 24	121 ± 33	0.25	0.615
Number of sampled leaves	29	189

Note: Sampled leaves of the eight species with egg masses (Figure 1) were used for statistical analysis.

Figure 3. The frequency distribution of the number of trees in relation to the numbers of egg masses found on each tree.

Figure 4. Spatial distribution of individual trees of all species (A) and that of Camellia japonica (B), and results of respective spatial analyses using the L-function (C‒F).