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50 People's Report 2002-2003 : <strong>Bangladesh</strong> Environment<br />

Table 1.3.35 Side-effects of Pesticides <strong>in</strong> Vector Control: Aquatic Vertebrates<br />

Country Pesticide Dose 1 Appli<br />

cation 2 Tsetse Control<br />

Reported effects<br />

Source<br />

Somalia Endosulfan 10-41 g/ha FW Kills of young small fish <strong>in</strong> still, shallow water; probably Doutlwaite<br />

(5x) negligible compared to observed large kills due to heat/ 1985<br />

asphyxiation.<br />

Cameroon Dieldr<strong>in</strong> 750-900 g/ha H Abundance of the two fishes most common <strong>in</strong> the Muller et. al.<br />

(1x) <strong>in</strong>vestigated brook (Aphyosemion bualanum, Clarias 1981<br />

walker; both consumed by man), did not show any<br />

changes after spray<strong>in</strong>g nor one year later.<br />

Rotswana Endosulfan 6-12 g/ha (6x) FW Some fish killed <strong>in</strong> open shallow pools; none among Fox et. al.<br />

grass swamp. Estimated 1% of population killed after 1982<br />

each spray<strong>in</strong>g.<br />

Several fish showed bra<strong>in</strong> damage and liver lesions Matthiessen<br />

immediately after onset of spray<strong>in</strong>g. Recovery after and Roberts,<br />

stopp<strong>in</strong>g of sprays (NB: no controls). 1982<br />

Endosulfan residues <strong>in</strong> liv<strong>in</strong>g fish low: 0.19 mg/kg w.w. Matthiessen<br />

(muscle) or (generally) 0.8 mg/kg w.w. (viscera). Values et. al. 1982<br />

returned to normal with<strong>in</strong> 3 months after cessation of<br />

spray<strong>in</strong>g. Killed fish were all small and had low lipid content.<br />

Nigeria Endosulfan 800-1000 g/ha H Mass mortality of fish occurred <strong>in</strong> river. After some days Koeman<br />

(1x) no live fish were seen anymore. After 1.5 months only et. al. 1978<br />

very few juvenile fish were collected. One year later fair<br />

numbers were aga<strong>in</strong> caught by local fishermen.<br />

Ivory Coast Endosulfan 267 g/ha (1x) H All fish <strong>in</strong> treated pool died. Everts et al.<br />

1983<br />

Nigeria Permethr<strong>in</strong> 500 g/km (1x) G Fish killed <strong>in</strong> pool of stand<strong>in</strong>g water (accident possibly). Smies et. al.<br />

No effects observed from cypermathr<strong>in</strong> (G: 440 g/km and 1981<br />

H:60-150 g/ha), deltamethr<strong>in</strong> (G:71.4 g/km and H:20-40<br />

g/ha) and permethr<strong>in</strong> (H:200-300 g/ha)<br />

Zimbabwe Endosulfan 14 g/ha FW Dead fish found float<strong>in</strong>g <strong>in</strong> pool or river 1-3 days after Cock-hill,<br />

application (5 species, 41 <strong>in</strong>dividuals). All smaller than 1979<br />

110 mm.<br />

Ivory Dieldr<strong>in</strong> 3-4 kg/ha G Considerable contam<strong>in</strong>ation of river water. Many dead Everts and<br />

Coast fish, most of them small. Koeman,<br />

1982-<br />

Niger Endosulfan 900 g/ha (1x) H Massive fish kills. Cont<strong>in</strong>ued for four days. Total of 48 Dortland<br />

species were recorded among the victims Approx. et. al., 1978<br />

5500 <strong>in</strong>dividuals. Even large fish were killed. After<br />

23 days local fishermen caught very few species and<br />

numbers. Residues <strong>in</strong> fish relatively low (0.02-1.45 ug/g<br />

muscle; 0.99-37.3 ug/g liver), but higher than from<br />

untreated areas.<br />

Burk<strong>in</strong>a Endosulfan 9.0 g/ha H No adverse effects on fish were seen <strong>in</strong> any of the Takken<br />

Faso Permethr<strong>in</strong> 1.9/4.3 g/ha treated areas. et. al. 1978<br />

0.19/0.36/<br />

Deltamethr<strong>in</strong> 12.5 g/ha<br />

1.3/2.6 g/ha<br />

Fenthion 3.3 g/ha<br />

Azamethiphosa<br />

Burk<strong>in</strong>a Permethr<strong>in</strong> 2.5(1x)/2.5 H Mortality of fish occurred after the two highest doses of Everts et.al.<br />

Faso (5x)/ 50 (1x) endosulfan. Some species ext<strong>in</strong>ct after 2nd spray round. 1978<br />

g/ha ) 0.2(1x) One year later small fish present aga<strong>in</strong>. Baldry et. al.<br />

Deltamethr<strong>in</strong> 12.5(2x) g/ha 1981<br />

5-10 g/ha(4x)/<br />

Endosulfan 100/200 g/ha<br />

(2x)<br />

Nigeria Dieldr<strong>in</strong> 0.68/1.8 G Mortality <strong>in</strong> fish and amphibians relatively low. Koeman<br />

kg/ha(1x) Residues of dieldr<strong>in</strong> <strong>in</strong> these groups (up until 1 month et. al. 1971<br />

after spray<strong>in</strong>g) were considerably elevated (0.1-5.4 ppm<br />

w.w. total body and 0.14-15 ppm w.w. <strong>in</strong> liver and/or fat).<br />

[contd.]

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