Mosquito Repellent against Anopheles Spp. and Aedes Aegypti on Cotton Fabric

■233

Table 13.2: Mass per m² and Add-on of treated samples.

Samples

Mass per m²

Add-on [%]

UN

208,42

Z20

214,13

2,74

I _5

211,11

1,29

WG10

211,54

1,36

I_5 _WG10

212,40

1,91

I _5 _Z20

213,67

2,52

I_5_F10

212,15

1,79

I_5 _WG10_F10

213,52

2,32

I _5 _Z20_F10

215,29

3,30

Cotton material treated with Immortelle oil and additions such as vibroactivated ze-

olites, water glass. For better durability Organosilane was added in some bath with Im-

mortelle oil. Repellents efficacy was measure According to Coleman, Govere and Dur-

rheim [6, 7]. Samples I_5 and I_Z20_F10 have the best efficacy – even 100%. No

mosquitos landed on these two samples. Another samples also have very good repellents

efficacy for Aedes aegypti mosquito (I_5 _WG10, I _5 _Z20, I_5 _WG10_F10 = 95%, and

I_5_F10 = 90%).

Figure 13.4 shows SEM images of the surfaces of the cotton fibers after treatment with

different mosquito repellents. It can be seen that untreated cotton shows fibrilar surface

structure. Cotton fibers surface looks smoother and uniform when impregnated with im-

mortelle oil, vibroactivated zeolite or water glass. vibroactivated zeolite (Z_20) and water

glass (I_WG_10) particles are clearly seen on the fiber surface. The zeolites particles are

uniform in the range from 5 µm to 10 µm . It is found that water glass (sodium silicates)

particles are smaller and located only in the spaces between fibers [13].

13.4

CONCLUSION

Mosquito repellents such as Immortelle oil, vibroactivated zeolite and water glass are

successfully applied on cotton fabric and gave a high repellents efficacy for Anopheles

Table 13.3: Number of landings Aedes aegypti mosquito on treated cotton.

Sample

n° of Landings

Negative control

22

I _5

0

I_5 _WG10

1

I _5 _Z20

1

I_5_F10

2

I_5 _WG10_F10

1

I _5 _Z20_F10

0