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Ê\

OUAGA .

_MEMORANDUM

To

Dossier Radio

Briefing Date fÿ

^{December 198J}

Attention

BRÏBFING ^OF CONCER§TNG RESUI,îS ^OF

Subject ÏEET A}TD TRO?OSAtrS FOR

rro,o'dfi:,Ituo

Our

ref.

VCU/1000 Your ref.

Originator

In the Eastem

Zone, onJ.y

, ^flIies

^were captr.rred

ln ^the

treated

zone. îbe

catch

at

Garbey-Kourou on

the Sirba in the far north also

^went

to zero.

^The

^pollcy of treatlng all flowing rivers

by

a:ir eontinued.

îwo

hellcopters

aceonplished

all

treatments

in

^{trvo rialrs.}

'It

_{was clecided}

_to

strspend

the

lower PendJari ^above

?orga.

^Sone

light rains fe1I in

southem Togo and Benin.

In the'l\rest, the results

were

also excellent.

The

only

disturbi:ng

fact

was

the

presence

of 9 flies i::

^{two days}

at

Chutes

Gauthler, including 1 nuJ-lipar. All

these

flies

had

dark (Ol)

wing

tufts.

Pupae

collected at the

same time

yielded J

^males

with

dark wing

tufts. îhe site

was I1ght1y

positive in

^{you:rg and.}

old larvae

and pupae before

treatnent but

negative

after.

^The

situation will

be watched eIose1y,

vrith additional

eatchi:lg days and treatrnents w111 be eontinued

during the last

^week

of the year if it is

^juclged necessary.

River

discharges contlnued

to faII,

reachin6; unprecedented lows

along

the

Black

Vo1ta. fhe Chief of nvaltiation

requ-ested

that

discharge measurements be made along

this river

by

the

sub-sector

chiefs

concerneclt

using the float

^method.

the levels of

^rnan-naCe

lakes arê also fallilg

and

the Chief

of _.the Bobo

Aerial

Operations base reported

that

treatments were beinrg extended d.ovrnstrea:n on the Blaek ^Vo1ta

for this reason. Field

personnel should ^be

alert to the possibility of

new breeding

sites

becoming acti-vated as the

lakes faII.

Al-so because

of

^{1ow water}

Ieve1s, several potential

breeding

sites belol îiassalé

^on

the

Banclama (aovrn

to

§roubrou) ^{have been}

treated for

^the

last three vreeks.

The

possibility of

^{gror:nd ancl}

aerial

prospections

of

these

sites

^was

diseussed. It

^{was decided}

that

^an

aerial

prospection

will

be pro-

granmed along

with other

pfospeetlon work

in the

a.rea.

îhe

second week

of

Sactimos use

ln the

Sassar:dra Basin confirmed

that the

KB5OO4

1ot is effective at ^1.5

^{ppm nhen treatment}

is lrgite par gite".

The RBlOOl

lot

however,

glves only a partial effect

^even

just

below

the application polnt.

Treatments

will

now continue

with the last

remaining d:rrms

of

K83004

aird olC

îelmgr to

^be

followed

by Telcra.r 32241.

Notes Sector by Sector:

L{anua1 treatments continued

in the

area

of

Bagulnedo. Ilanual

treat-

ments

will

begin

at

Dogosso on

the

Bani

next week. îhe

boat

will reolace aircraft at fienfala

^{on the}

itiger

^{as soon as outboard motors}

arrive

from Bou-aké. Prospections

will

contjnue

in

the Bandiagara area

until the

end

of the

^year.

Bamako:

.../2.

\

3obo

^: llothj.nr3 special-

to report.

cease

after tl-e

51st ^rveel:,

no1"f .

Plarlue eatclies

at leraba

Bridge ^wi.)-I Jravin8 bcen negative

for

several weel:s

j O'ul Ll-;e :

the

^probl-ei

at

Chutes Gau.thirr l:as bcen discr-rssed above.

;\ arelirainer;i test of

pcrr:rctl'rj-n

is stiIl"

plnr:ned

for the

lower

Comoe

befoie R.t.

trcafurients

start.

i[.iJ.

In

^view

of the

genera] slispensicn

of fielâ actlvities

ciurin,;

the

52nd.

r,'eel: and-

officie.l- iroliia;is, thc briefi.nS to

iisc'.;.ss

the resr-[ts

o-l the

51st

^{vrcek and}

plat: tl:e first

^week

oi

1984

vil-1

be helC on I'ieCnesl'laJ.'

28/12 insteacl

of

IIonCa;, 25/12.

Chief

VCiI

Chi.ef ]]valuat:-on

Ohiei

llone Sast

Ci:ief

Zonc T,rest

Chic

f

Âerj-e.] Operations

l,:r. I.

fa:rga1et, Bobo

:ir. J. ioutl:-louth,

Iia.ra

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