Table 1.

Effect of 20-hydroxyecdysone on protein and alpha-amylase activity of Tribolium castaneum larvae after 7 d of treatment

Treatment	Protein (µg/larvae)	α-Amylase (µg of starch consumed/larva)
Control	233.15 ± 24a	174.63 ± 1.7a
300 ppm	151.32 ± 15b	161.25 ± 2.06b
600 ppm	149.13 ± 5b	150.53 ± 2.5b
900 ppm	110.07 ± 20c	145.15 ± 2.2c
1,200 ppm	95.7 ± 16c	134.95 ± 1.9c
Starved	48.34 ± 7.7d	132.38 ± 2.6c

Means in the same column followed by different letters indicate that the difference between controls and treated or starved larvae is statistically significant as determined by the Tukey’s HSD test. Between the letters ‘a’ and ‘b’, the effect is significant (P < 0.05). Between the letters ‘a–c’, the effect is very significant (P < 0.01). Between the letters ‘a–d’, the effect is very highly significant (P < 0.001).