RÉSUMÉ
Activities of invertase [alpha-1-2 glucosidase] trehalase [alpha-1-1 glucosidase] cellobiase[beta-1-4 glucosidase] and proteases in the midgut of 3[rd] instar larvae of Cephalopina titillator and Lucilia cuprina were determined. Homogenates from third instar Larval midgut showed the invertase, trehalase, cellobiase, and proteases activity in L. cuprina were more than that of C.titillator and upon using T. test it was found that there was a very high significant difference between the activities of the mentioned enzymes in the two insects. The enzyme activities may be affected by the different habitats of the larvae
Sujet(s)
Animaux , Diptera , Ovis , alpha, alpha-Trehalase , Cellobiose , GlucosidasesRÉSUMÉ
Light and scanning electron microscope [SEM] were used in the description of Lucilia cuprina larvae. The mouth hooks are poorly developed in the 1st instar larva and well developed in the 2nd and 3rd larval stages, the antennal lobes and maxillary lobes are poorly developed in the 1st instar, but generally showed a higher degree of development in the 2nd and 3rd instar larvae. 1st instar larvae has cuticular sensilla represented by spines arranged, specifically in the dorsal and ventral locations. The distribution of fleshy processes and tiny spines at the body segments of 1st, 2nd and 3rd instar larvae are described in details. The morphological characteristics of the cephalic segment, anterior and posterior spiracles of the three larval instars are also described
Sujet(s)
Animaux de laboratoire , Insectes , Morphogenèse , Maladies des ovins , OvisRÉSUMÉ
Investigations into the phototactic behaviour of Chrysomyia albiceps led to the following results [a] The phototactic behaviour of the third instar fresh larvae had moved away from the light within 50 sec. [96%] [b] Fatigued larvae moved across the division line several times and took more time to travel away from light