Effect of Beauveria bassiana and Metarhizium anisopliae var. acridum on the 5th instar nymphs of
Schistocerca gregaria was studied in the laboratory. Infection by these both entomopathogenic fungi
caused reduction in the hemolymph total protein. The average amounts of total proteins were 2.3, 2.07,
2.09 μg/100 ml of haemolymph in the control and M. anisopliae var. acridum, and B. bassiana basedtreatments,
respectively. Three types of haemocytes were recognized and identified as prohaemocytes,
plasmatocytes and granulocytes. The treatment caused significant reduction in the total haemocyte
count and in each haemocyte type on the 9th day after its application.