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Published online by Cambridge University Press: 31 May 2012
The uric acid content of the fats and the whole organism was determined by the Technicon spectrocolorimeter method for all instars of healthy and nuclear-polyhedrosis-infected larvae of Neodiprion swainei Midd. The results obtained revealed that (a) in healthy larvae the uric acid content gradually increased from 20 to 470 p.p.m. from the first to the fifth instar inclusively and (b) in virus-infected larvae the uric acid content was always greater than in healthy larvae. It increased from 21 to 493 p.p.m. from the first to the beginning of the fourth instar, reached a maximum of 830 p.p.m. at the end of the fourth instar, and decreased to 680 p.p.m. at the fifth instar.
La quantité d’acide urique accumulé a été déterminée pour tous les stades de la larve saine de Neodiprion swainei Midd. et de la larve infectée par la polyèdrie nucléaire, au spectrocolorimètre Technicon, dans le tissu adipeux et chez l’organisme tout entier de la larve.Les résultats révèlent que (a) chez la larve saine, le taux d’acide urique augmente constamment, du 1er au 5e stade, de 20 à 470 p.p.m. et (b) chez la larve infectée par virus, la quantité d’acide urique accumulé est beaucoup plus forte et augmente de 21 à 493 p.p.m. du 1er au début du 4e stade, atteint un maximum de 830 p.p.m. en fin du 4e et diminue à 680 p.p.m. au 5e stade.
