Combined Effect of Methanol Extracts and Essential Oils of Callistemon rigidus (Myrtaceae) and Eucalyptus camaldulensis (Myrtaceae) against Anopheles gambiae Giles larvae (Diptera: Culicidae)

Table 6

Synergistic factor and cotoxicity index of the combination of the essential oils of E. camaldulensis and C. rigidus.

Combinations	LC50 (ppm)	Synergistic factor	Cotoxicity index	Type of action
E100% : C0%	223.03	—	—	—
E75% : C25%	62.87	2.709	270.908	Synergistic
E50% : C50%	132.58	1.039	103.908	Additive
E25% : C75%	115.16	1.004	100.428	Additive
E0% : C100%	99.66	—	—	—

E100%, 75%, 50%, 25%, and 0% = E. camaldulensis 100%, 75%, 50%, 25%, and 0%, respectively; C100%, 75%, 50%, 25%, and 0% = C. rigidus 100%, 75%, 50%, 25%, and 0%, respectively.