The role of cholesterol in haemolymph cation pattern of the last larval instar of the mulberry silkworm Bombyx Mori (L.) | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 3, Issue 2, December 1991, Pages 30-48 PDF (969.54 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1991.461578 | ||
| Author | ||
| M. M. Essawy* | ||
| Plant Protection Dept., Fac. of Agriculture, Tanta Univ., Kafr El-Sheikh, Egypt. | ||
| Abstract | ||
| Changes in the concentration of cations in the hemolymph of silkworm B. mori were studied in both cholesterol-treated and normal larvae. 1- Sodium concentration in the haemolymph of treated larvae was lower than that of control. 2- The potassium level in the haemolymph of control larvae decreased during the obligatory feeding period. Then, from the 5th day to the prepupal stage, no change was observed in treated larvae, during the first 7 days, potassium concentration was significantly lower than that of control. While from day 8 and until pupation, Potassium level was significantly higher than that of control larvae. 3- Na+/K + ratio in control larvae was lower than one. In treated larvae, during the first 7 days, the ratio was more than one. From day 8 up to pupation the ratio remained less than one and lower than that of control. 4- The calcium level was higher in treated larvae than that of control. 5-The haemolymph magnesium concentration increased significantly during the obligatory feeding period in treated larvae and reached (218.82 ± 9.8 mg/ 100 ml) at the 4 th day. While, during the last three days, it was significantly higher in control larvae. 6- Ca+2 / Mg+2 ratio in control and treated larvae was lower than one. In treated Larvae, the ratio was higher than that of control | ||
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