Abstract
Melia azedarach L. extracts were studied in comparison with selected synthetic in-secticides against the mulberry whiteflies Pealiusma chili and P. mori under labora-tory conditions. Morus alba (cv. “Early Spring”) leaves infested by mulberry white-flies were exposed to Melia extracts of green fruits, l-cyhalothrin (10% a.i.) and con-trol. Also, white mulberry leaves after treatment with the same insecticides were provided to silkworms for consumption. Results have shown that there were signif-icant differences in the nymphal mortality of the whiteflies among treatments. Melia extracts and l-cyhalothrin were effective in increasing whitefly mortality 24 h after application. Furthermore, Melia extracts didn’t affect silkworm survivorship, which was severely affected by l-cyhalothrin treatment, since all the silkworms fed on treated leaves were found dead. Thus, these extracts might be considered a potential alternative in management of the mulberry whiteflies.
Highlights
Sericulture is the art of silk production, which comprises cultivation of mulberry, silkworm rearing and post cocoon activities leading to production of silk fiber
Melia azedarach L. extracts were studied in comparison with selected synthetic insecticides against the mulberry whiteflies Pealiusma chili and P. mori under laboratory conditions
Melia extracts didn’t affect silkworm survivorship, which was severely affected by l-cyhalothrin treatment, since all the silkworms fed on treated leaves were found dead
Summary
Sericulture is the art of silk production, which comprises cultivation of mulberry, silkworm rearing and post cocoon activities leading to production of silk fiber. Due to the employment it provides, the economic development and the improvement in the quality of life to the people in rural area, it has great economic importance and, it plays an important role in anti-poverty program and prevents migration of rural people to urban area in search of employment [1]. Until today silk is considered one of the best and most expensive fabrics due to its fibers properties. The major silk producing countries in the world are China, India, Uzbekistan, Brazil, Thailand, Vietnam, Japan, etc. China and India are the main producer countries with more than 70% of the world’s annual production [2]
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