Evaluation of Pathogenicity of Entomopathogenic Oomycetes Lagenidium giganteum and L. ajelloi against Anopheles Mosquito Larvae

Table 2

Time taken by a specific concentration of Lagenidium ajelloi and L. giganteum zoospores to kill 50% larvae (LT₅₀).

Fungal species	Concentration (zoospore/ml)	LT50 lower limit (hours)	LT50 (hours)	LT50 upper limit (hours)	SE
L.ajelloi	1000	45.43	62.58	86.19	±4.66
	2000	35.59	63.58	113.58	±8.89
	3000	55.71	58.95	62.18	±1.64
	4000	55.68	58.87	62.01	±1.62
	5000	54.51	58.19	61.88	±1.87
L. giganteum	1000	101.24	105.55	109.87	±2.19
	2000	99.96	104.17	108.38	±2.14
	3000	96.62	100.59	104.56	±2.01
	4000	93.74	97.52	101.30	±1.92
	5000	86.15	89.31	92.48	±1.60

As expected, an increase in the concentration of zoospores resulted in a shorter LT₅₀. The shortest LT₅₀ was observed in L. ajelloi zoospores indicating that L. ajelloi is more potent against A. gambiae larvae compared to L. giganteum.