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Effect of the juvenile hormone (JH) on the morphogenesis of the gonads was studied by means of its analogue methyl farnesoate dichloride (DMF). The regulation of morphogenesis by JH varies profoundly in different tissues, DMF keeping the epidermis at the larval stage, does not influence the gradual differentiation of tissues in the rudiments of gonads throughout the larval development. A two days absence of the JH at the beginning of the last larval instar, when the future development of the imaginal tissues is predetermined, is necessary for the normal course of morphogenesis of the prefollicular tissue. This imaginal character remains …
