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Table 3 Larvicidal activity of neem oil formulation against mosquitoes larvae in field

From: Larvicidal activity of neem oil (Azadirachta indica) formulation against mosquitoes

Mosquito species

Breeding sites

Pre treatment density

Percent reduction of larval density (mean ± sd)

Day-1

Day-2

Day-3

Week-1

Week-2

Week-3

Culex

Pits

28.9 ± 10.6

95.9 ± 3.5

90.2 ± 6.9

87.2 ± 11.0

87.5 ± 8.2

85.9 ± 8.0

80.5 ± 7.3

 

Tanks

26.8 ± 11.5

91.9 ± 5.8

93.2 ± 3.2

97.7 ± 1.9

92.4 ± 8.0

86.2 ± 8.2

80.7 ± 9.2

 

Drains

115.7 ± 64.6

99.4 ± 0.6

98.8 ± 1.2

98.6 ± 1.4

84.9 ± 4.6

85.0 ± 11.8

77.8 ± 11.0

   

95.5 ± 4.1

94.1 ± 4.3

94.5 ± 5.5

89.9 ± 2.5

85.7 ± 0.8

79.7 ± 1.6

Anopheles

Pits

13.5 ± 7.5

96.2 ± 4.5

100

100

100

85.4 ± 14.1

76.6 ± 9.6

 

Tanks

10.4 ± 5.7

98.2 ± 1.8

100

100

100

87.0 ± 9.7

77.7 ± 10.0

 

Drains

13.0 ± 6.7

100

100

100

100

98.7 ± 1.3

97.0 ± 3.0

   

98.1 ± 1.9

100

100

100

90.4 ± 7.2

83.8 ± 11.5