V Ec E =xx

i  { Vx  V Ec U-{x E    Jc Ex  x SEi* Ec E |E{ S i E +{I x i  +vE i  + ,,  M E] {n E ni * E S i  <xE | E {ci  {xi vx E |E +l , V U Si E Vi , <xE |E{  V E Vi x E n (survival rate) |i  +
+xiiMi =i{nx  E + Ei *
 n  <x Eb E  E ii vhi:  @i E { il ixi n +vE i  * <x V Eb   +vEi S  (larva)+l    E (adult),U E V  E-E +ME V E  J Vi * <E + Vx E Ij  ,  U E B |iM r i  *
S i  Si U E V E x {Sx  J Ec xxJi  :
1. c +E  ]
E il  +l    U E V E Ih Ei  *
2. M :
< Vi E |:  Ec I i  * {U E + ix  Ec (back swimmers) i  c J  { Vi  (Sj 11)*  U] V il +ME V iE E +l E x {Si  *  iE E U]-U] gE {    ni  *  +{x xE  (BEAK)u V E  E vE  E  (body fluid) S i  *
3. bMx }< (Dragon fly)
x E +l   BE V I Ec  (Sj 11)*V il +ME V E  x {Si  * |M ,  nJ M  E bMx }< E BE x (E 15 0 0  )E ix Px]  E{ U E  V E J i  * +i: V S  { <x Ec  i E H Ex +E  * <xE x B xjh E E< Yi v  Vx J xxJi  :
=xx il xjh v

1. V E |M : I Vn E{c  x ]x V E  |M  Ec E i  xE E x] E V Ei  * {h =xx i V u  x    | E  iVxE  Ei  *
2. {x {{] E +x i + x E P E |M :
V Ec E xjh E B i il x E P x E = V E i { { fM  UcE Vi  *{ V Ec V i { x E B +i  x E G  E] E Eh  Vi  *  E i  n E E x{i i il E{c vx E x E BE xSi +x{i  (56 E0O0 i il 18E0O x |i C])P i E Vi  + i  S  E 12-25Ph] { UcE n Vi  *{U E n  ix  M (back swimmers)E i E +v P]    Vi  * v E j +vE g nx { ] E  il M E x   * +VE x E n BE +x vE ]{  300 (Teepol-B 300) E   E Vi  * 560 00]{-300E l 50 E0O0
 E i  Vi  *<xE UcE iV   x Ex SB +xl  i E i  E ZE  V  Vi  il i E n i <xE + x  {i *
3. bV-< E |M : <x Ec E xjh i ] E i M x BE x ={ ff xE  * E =x M x  P E  E  {xi =xE u x M v E v EU +M il +{IEi i   * P E B bV BE ], < b< +C<b 1011, 0.75 0 0 il V 40 .. Vi  * i P E UcE 1040.75 0 0 |i 200 M] V Ij E n  E Vi  *
4. i{x E i E UcE : i{x E i E UcE 750 |i C] E n  Ex { M E +v P] E +xn  V Ei  * <E |M V S E {  n   E V Ei  CE i{x E i E |iE | Si V { x {ci  * <E | z |E E x{i  Vxi {E {  x {ci *
>{ E z v  i il x  x P E |M k  * < S E n  |M E V Ei  *
<x v E +  +xE |E E E]-xE n+ E |M E V Ei  {xi S i E B  v ={H x  *

G& {U

J{`

G& +M

- Vx
- n E{ U
- n E{ U
- E ={S
- i E i
- V {v E =xx
- +xE UE =xx
- Eb E =xx
- V S
- {{E +
- +vE V |M
-  {li
- =E E |M
- UE xE