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Issledovanie empiricheskikh dannykh dliny i vesa gusenitsy tutovogo shelkopriada Empirical data on the length and weight of Bombyx mori larvae The dynamics of the development of Bombyx mori larvae



Issledovanie empiricheskikh dannykh dliny i vesa gusenitsy tutovogo shelkopriada Empirical data on the length and weight of Bombyx mori larvae The dynamics of the development of Bombyx mori larvae



Publ by Zakavkazskii Nauchno-Issledovatel'skil Institut Shel-kovodstva i Shelkovedeniia [Transcaucasian Sci Res Inst Sericulture and Silk Science ] P 3-29



In the "Bagdad," "Ascoli," "Kutais yellow" and "Chinese golden" races larval length increased 30, 29, 29, and 32 times and the wt. 10.692, 9.951, 9.293, and 10.083 times, respectively. Maximal daily increases in length and wt. were attained in the 4th and 5th instars. In the lst-4th instars maximal daily increase in length occurred in the middle of each instar, and in the 5th on the 3rd, 4th or 5th day. The maximal daily increase in wt. in the lst-4th instars was noted 15-36 hrs. before molting and in the 5th at about the middle of the instar. The greatest daily increase in length and wt. (in % to the total length and wt.) in each instar occurred on different days which varied according to race and instar. The relative increase in length and wt. for each instar varied in differ ent races, but was greatest in the 1st instar. After each molting a slight temporary decrease in wt. and an increase (except after 1st molt) in length was noted. The coefficient of development was greatest in the 1st instar, least in the 5th. The greatest coefficient of development and increase in relative wt. was noted in the "Chinese golden" race. The increase and the greatest relative increase in the 1st instar, the maximal increase in length, the greatest length before spinning, and the daily and relative increase in length in the 5th instar had a correlation with the corresponding data for wt. The intensity of growth was greatest in the 1st instar. Numerous graphs and tables are appended.

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