The weight of fresh cocoon was clearly affected by JHA insecticide and glycine amino acid (Table 2).Larvae treated topically with 1 and 10 μg pyriproxyfen then fed on mulberry leaves previously treated withglycine amino acid only at 1% concentration showed highest cocoon weight reaching 1.720 and 1.674 g, respectively.In addition, larvae fed on mulberry leaves treated with glycine amino acid only at 1% concentration reached 1.640 g.