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Effect of starvation on fenoxycarb-treated fifth instar larvae of Bombyx mori L



Effect of starvation on fenoxycarb-treated fifth instar larvae of Bombyx mori L



Redia 80(0): 147-155



The non-spinning syndrome of Bombyx mori L., due to the Insect Growth Regulator Insegar (fenoxycarb) causes heavy losses to silkworm rearing of Northern Italy every springtime. In this paper the effect of starvation on silk production in larvae, which were treated with low dosages of fenoxycarb to reproduce field situation, was investigated. On the basis of the obtained results and in a situation where mulberry leaves are polluted by fenoxycarb, it is recommended that silkworm rearers stop feeding around the VII-VIII day of the fifth instar, even if the larvae do not show the typical behaviour which precedes mounting. In fact, feeding longer than this period increases the mortality rate and is detrimental to production.

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Accession: 031114799

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