Larvicidal activities of Cinnamomum osmophloeum and matricharia chamomella extracts against the filarial mosquito culexquinquefasciatus [diptera:culicidae] and their effects on its haemogram

The larvicidal activities of the bark essential oils of [Cinnamon] Cinnamomum osmophloeum and the leaf essential oil of [Chamomell] Matricharia chamomella were evaluated Culex quinquefasciatus in laboratory. The toxicity index, LC[50] values were 0.260 and 0.310 mg/L for Cinnamomum osmophloeum and Matricharia chamomella, respectively. Four types of haemocytes: prohaemocyte [Pr], Granulocytes [Gr], Plasmatocytes [Pl] and Oenocytoides [Oe] were determined, the present results show that cinnamon and chamomile oils significantly decreased the number of Pr, Gr and Pl and increased the number of Oe. Furthermore, the effect of tested plant oils on the haemocytees surface area were evaluated

Changes in the haemocytes of bombyx mori larvae [Lepidoptera: bombycidae] in relation to Escherichia coli and bacillus thuringensis infection

Injection of Bombyx mori fifth instar larvae with non- pathogenic bacteria Escherichia coli and entomopathogenic bacteria Bacillus thuringeinsis affected in the total haemocyte count and changes in the different haemocyte population during bacterial infection. Cellular immunity responses of B. mori against bacteria and the hormonal regulation of immunity were also studied

Effect of some insecticides on the haemolymph of desert locust Schistocerca gregaria forskal

The toxicity and the physiological effects of insecticides, chlorozan, marshal and deltamethnne and the alternative pesticides spinosad and proclaim on the desert locust Schistocerca gregaria were tested. The toxicity index, LC50 values after 24 hrs were 171.16, 44.29 and 410.05 ppm. for chlorozan, marshal and deltamethnne, respectively. Also the values of LC50 after 48 hrs were 425.58 and 101.58 ppm. for spinosad and proclaim, respectively. The effect of all tested insecticides, on the total and different haemocytes count of the 4[th] instar nymphs of Schistocerca gregaria were evaluated. The obtained results revealed that the total haemocyte counts were clearly affected by insecticides tested at LC50 values. Chlorozan and proclaim decreased the total haemocytes count [THCs] 50% compared to control. Also marshal and deltamethrine decreased the total haemocyte count by 35 and 18.3%, respectively. While spinosad showed a slight decreasing in the total haemocyte by 8.9% compared to control. Six different haemocyte types were identified as prohaemocytes [pr], granulocytes [gr], non-granulocytes [n-gr], plasmatocytes [pi], oenocytes [oe] and spherulocytes [sph] cells were monitored. In general, all the tested insecticides decreased the counts of all the haemocyte types. The application of spinosad increased the pr, pi, oe and sph. While it dercreased both n-gr. and gr. The toxicological profile of the tested pesticides described herein characterizes their effects on S. gregaria haemocyte types and the total haemocytes count [THCs] when compared with control. These results could be indicate a new proposed mode of action to those friendly environmental promising compounds

Effect of Varroa destructor on different haemocyte count, total haemolymph protein on larvae, pupae and adults of Apis mellifera drones

The effect of infestation with Varroa destructor Oud. [Acarina: Varroidae] on the heamolymph of the different stages in honey bee drons were studied. It decreased the total haemocyte count [THC] by 47.4%, 13.04% and 65% for infested larvae, pupae and adults, respectively. Differential haemocyte count [DHC], haemocyte surface area, corpora allata surface area [CA] and total haemolymph protein [THP] were decreased also due to infestation with varroa mite