Effects of disease and insect pests on nutrient composition of mulberry leaves and economic characters of silkworm

doi:10.16178/j.issn.0528-9017.20230353

Abstract

Abstract:

In this study, the effects of disease and insect pests on nutrient composition of mulberry leaves and the growth and economic characteristics of silkworm were analyzed, and the possibility of using disease and pest affected mulberry leaves to reduce the loss of silkworm was discussed. Normal mulberry leaves, brown spot mulberry leaves and red spider insect mulberry leaves were collected to detect the nutritional components of each group. The effects of disease and pest affected mulberry leaves on silkworm were analyzed through silkworm rearing experiments. The results showed that the contents of crude fat and soluble sugar in diseased mulberry leaves were significantly higher than those in normal mulberry leaves, while the contents of total amino acid and crude fiber were significantly lower than those in normal mulberry leaves. The contents of total amino acid and crude protein in pest affected mulberry leaves were significantly higher than those in normal mulberry leaves, while the contents of crude fat and soluble sugar were significantly lower than those in normal mulberry leaves. The results of silkworm rearing experiments showed that mulberry leaves had a great effect on cocoon quality, but had no significant effect on cocoon production and growth of ten thousand silkworm. The yield of mulberry leaves was damaged by brown spot and red spider, but it still had feeding value. Timely harvest for silkworm rearing can reduce loss and increase yield.

Key words: diseases and insect pests, mulberry leaf, nutrient composition, silkworm, economic character

CLC Number:

S888.7

SU Siyuan, ZHANG Zhiyong, HU Chunmei, LIU Binbin, LIU Junfeng, WANG Honglin, KOU Jing, WU Jianmei. Effects of disease and insect pests on nutrient composition of mulberry leaves and economic characters of silkworm[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(11): 2733-2737.

Figures/Tables 6

References 17

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调查项目	粗蛋白	粗脂肪	粗灰分	粗纤维	可溶性糖	水分
病害桑叶	18.82^##	1.24^**##	12.87	11.40^**##	6.97^**##	77.63
虫害桑叶	20.02^*	0.65^**	14.83	12.10	4.35^**	76.09
正常桑叶	19.32	0.89	13.09	12.00	5.31	79.16

调查项目	粗蛋白	粗脂肪	粗灰分	粗纤维	可溶性糖	水分
病害桑叶	18.82^##	1.24^**##	12.87	11.40^**##	6.97^**##	77.63
虫害桑叶	20.02^*	0.65^**	14.83	12.10	4.35^**	76.09
正常桑叶	19.32	0.89	13.09	12.00	5.31	79.16

桑叶	苯丙氨酸	组氨酸	赖氨酸	精氨酸	亮氨酸	蛋氨酸	苏氨酸	缬氨酸	异亮氨酸
病害桑叶	6.19	2.22	5.24	5.56^*	9.76^*##	1.51^**	5.00	6.43	5.24^*
虫害桑叶	6.16^*	2.25	5.29	5.65^*	9.49	1.52^**	5.07^**	6.45	5.29^*
正常桑叶	6.26	2.21	5.04	5.34	9.47	1.15	4.81	6.34	5.04
桑叶	天门冬氨酸	谷氨酸	胱氨酸	脯氨酸	甘氨酸	丙氨酸	丝氨酸	酪氨酸	氨基酸总量
病害桑叶	11.75^**##	13.10^#	0.32^**##	5.71^**	6.35	7.14^**##	5.16^*	3.57	12.60^**##
虫害桑叶	12.61^**	12.75^**	0.36^**	5.58^**	6.38	6.67	5.00	3.70	13.80^**
正常桑叶	13.28	13.36	0.23	6.34	6.26	6.79	4.89	3.36	13.10

桑叶	苯丙氨酸	组氨酸	赖氨酸	精氨酸	亮氨酸	蛋氨酸	苏氨酸	缬氨酸	异亮氨酸
病害桑叶	6.19	2.22	5.24	5.56^*	9.76^*##	1.51^**	5.00	6.43	5.24^*
虫害桑叶	6.16^*	2.25	5.29	5.65^*	9.49	1.52^**	5.07^**	6.45	5.29^*
正常桑叶	6.26	2.21	5.04	5.34	9.47	1.15	4.81	6.34	5.04
桑叶	天门冬氨酸	谷氨酸	胱氨酸	脯氨酸	甘氨酸	丙氨酸	丝氨酸	酪氨酸	氨基酸总量
病害桑叶	11.75^**##	13.10^#	0.32^**##	5.71^**	6.35	7.14^**##	5.16^*	3.57	12.60^**##
虫害桑叶	12.61^**	12.75^**	0.36^**	5.58^**	6.38	6.67	5.00	3.70	13.80^**
正常桑叶	13.28	13.36	0.23	6.34	6.26	6.79	4.89	3.36	13.10

桑叶	食下干物重/g	蚕粪干物重/g	消化干物重/g	消化率/ %
病害桑叶	505.01	362.94	142.07^#	28.13^#
虫害桑叶	531.92	367.54	164.37	30.90
正常桑叶	511.25	364.36	146.89	28.73