The final instar larvae of trimolters and tetramolters of silkworm appeared similar in their growth and body weight and showed similar feed efficiency.

• 三眠蚕末龄与四眠蚕末龄的生长规律比较相似,三眠蚕末龄与四眠蚕末龄体重饲料效率变化有相似倾向;