Table 2.

Nymphal average and MDT of L. striatellus in the three geographic populations under 2 long-day photoperiods at 20 and 27°C

Temperature	Population	Development time (d)
		Average		Maximum
		Day length—14hr	Day length—16 hr	Day length—14 hr	Day length—16 hr
20°C	HY	31.52 ± 0.44	32.20 ± 0.40	47	45
	JY	38.02 ± 0.63	37.78 ± 0.43	49	47
	CC	48.46 ± 1.99a	43.53 ± 0.79	80	72
27°C	HY	14.49 ± 0.20	13.98 ± 0.37	21	18
	JY	16.51 ± 0.40	16.28 ± 0.54	28	27
	CC	22.45 ± 0.69	21.51 ± 0.67	32	30

Data of average development time in the table are means ± SE. ^aThe significant difference of average development time between 2 long-day photoperiods of 14:10 and 16:8 (L:D) h within the same population at the same temperature in by Student’s t-test (P < 0.05). The sample size for each treatment varied from 268 to 315. HN, Hanoi population; JY, Jiangyan population; CC, Changchun population.