Tag Archives: Pesticide

Chemical Management

English: A sign warning about pesticide exposure.

English: A sign warning about pesticide exposure. (Photo credit: Wikipedia)

An Health and  Saftey  Warning

User habits surveys for 2007 and 2010 indicate that gardeners don’t always use, store and dispose of pesticides correctly. If you use pesticides, you are responsible for using these chemicals correctly and effectively. We must keep our gardens and allotments safe for children, pets and wildlife.


When I  was  working  for  Lambeth Council  back  in 1980  all  the  employers  had  to  pass  a  strict  pesticide course  lasting  a  year  this  was  a  tough  course    but  it  made  you  aware  of  the  dangers  of  the  product  and  how  to  safety  apply  it.

But  looking  on  the  prospective  of  the  member  of  the  public  these  rules  no  longer  apply  as most  products  you  buy  claim  to  safe  to  the  environment if  you  follow  the  instructions  to  letter

But  with  this  scare  of  slugs  pellets  and  weed  killer  getting  into  our  water  I  don’t  think  the  news  is  getting  across

So  I’ll tell  you  how  to  apply  herbicides  or  pesticides  safely

  • Read  the  Label  (  I  know  it  obvious  &  that  you  think  you  know  it  all  but  you  don’t)  How  many  of  you  put  weed killer  down   then double  dose  the  plant  again . This  is  all  wrong  the  formulation  is  worked  out  in  the  lab.  for  maximum  effect  and    by  double  dosing  you  are  probably  increasing  the  salinity  of  the  soil.
    description of  pesticide  label

    description of pesticide label


  • Calibrate  –  What  I  do if  using  a  sprayer is to  fill  up  the  water  with  water  and  go  over  the  plant   or   ground  first   making  sure  that  plant  is  soaked  ie  beginning dripping  or  that  ground   is  covered  with  spray .

I  then  see  how  much  water  i  used  and  then  do  a  simple  division  to  find  out  how  much  chemical  i  actually  use  use all  the  instructions  say  4 cap  full  to   1 litre  or  1  gallon  of  water

  • When  using  any  chemical  always  use  PVC  gloves   these  are  cheap  and  better  than  latex  gloves  that  can  rip  and  allow   the  chemical  to  get  in  touch  with  your  skin
Red  Pvc  gloves

Red Pvc gloves

Note  the  tight  cuffs  around  the  wrist  this  makes  sure  that  nn  drips  get  on  to  your  hands

  • When    mixing  the  chemical  put  in  the   some  water  first    then  add your  chemical ( Some  products  have  it  all  ready  made  up  if  so  skip this  )  and  keep  on  stirring  it  until  it  dissolves then  top  up with  the  rest  of  water  mixing  it  again .By  doing  this   you  have dissolved  and  mixed  up  all  the  chemicals
  • If  the there  a  slight  breeze  or  wind  blowing  either  wear  a  mask  or  try  not  to  spray  into  the  wind .(  Note  chemical  spray  can  carry  in  the  wind  for  miles  without  you  knowing  and  with  out  a  mask  you  likely  to  get  some  on  your  mouth   )
  • Although  there  are  organic  or  biodegradable products  that  claim there  are  safe  I  always  veer on  the  side  of  caution

How  to  calibrate  your  sprayer 

The single most asked question in pesticide application is: “How much do I put in a knapsack?”

The answer is that it depends on the calibration of your sprayer. In short, how many square metres one sprayer full of water + pesticide will cover.

It is important that the correct amount of pesticide is applied per square metre, the amount of water much less so.

An  Professional Knapsack sprayer

An Professional Knapsack sprayer

As every sprayer has a different capacity, different nozzles with higher or lower output, a different operator who works at a different speed and pumps at a higher or lower pressure, calibration is the only answer. Here is one simple way to do it:

1. Measure exactly one litre of water into an empty sprayer and prepare it for spraying.

2. On a dry hard surface where you can see the spray wet it, walk forward, continually spraying as you would normally operate until the sprayer is empty. Measure how many square metres you have covered. Let us assume that this might be for instance, 20 square metres.

3. If your sprayer is a 15 litre model you multiply its normal capacity (15) x 20 (area one litre covered) = 300 square metres. This is the area that a whole knapsack will treat.

4. To work out how much pesticide to measure into the sprayer is now very easy. Look at the application rate on the product label.

eg. Roundup ProBiactive is 5L (=5,000ml) per Hectare (10,000 sq. metres)

5. To calculate how much to measure into your sprayer:

For example: 300 (Area that one sprayer full will cover) x 5,000 (Pesticide application rate per hectare in millilitres) / 10,000 (One hectare in square metres) = 150 millilitres

amateur sprayer

Start  your  spraying

  1. Working  up  and  down  the  plant   making  sure  that  both  surfaces  of  the  leaves  are  well  coated  and  started  to  drip
  • Always  spray  first  thing  in  the  morning  this  is done for several reasons ;-
  •   to  avoid  any  harm  to  the  pollinating  insects
  • and  also  the  leaves    spores  will  be  fully  opened
  • The  plant  has  time  to  recover   after  the  spray    and  the  leaves  will  be  dry
  1. Avoid  spraying  any  chemicals  near  water

For  Weed  Killer   there  is  one  simple  rule  DO NOT  SPRAY  NEAR  WATER  SURFACES

If  you  miscalculated  and  still  have  some  chemical  left  NEVER  EMPTY  IT  DOWN  THE  DRAIN

Storing  Chemicals 

  • After you have used a pesticide, make sure that the packaging is tightly closed or sealed to avoid spillage.
  • Store pesticides in a safe place, out of reach of children and pets.
  • Take particular care to store slug pellets safely to avoid accidental poisoning of children and pets – particularly dogs.
  • Garden sheds and greenhouses are not ideal for storing pesticides as they can get very hot in summer or cold in winter. Pesticide products are best stored at an even temperature.
  • If you store it carefully, any remaining pesticide will be effective for some years to come. You can check whether it is still legal to use by using  there  database

Concentrated pesticides that have been diluted and stored may not work as well when you next use them. It is also illegal to store pesticides that are unlabelled and not in their original container for safety reasons. Remember to only dilute enough for that day’s use.

Disposing  of  Chemicals

  • Whether you’ve diluted it or not, never pour pesticides down a drain or any other water drainage system (e.g. sink or toilet) because of the risk of contaminating water and harming wildlife. You could face prosecution.
  • Pesticide containers that have held concentrated product (i.e. requiring dilution before use) should be rinsed three times adding the washings to the final spray solution. The empty container can then be placed in household waste.
  • Empty pesticide containers that have held Ready-to-Use product (i.e. trigger sprays) can be disposed of directly into your household waste.
  • Other empty pesticide containers e.g. bags and cardboard boxes can also be disposed of in your household waste.
  • Check the label for any other advice on disposal of the product or empty container.

Pyrethum Explained

English: Feverfew (Tanacetum parthenium; syn. ...

English: Feverfew (Tanacetum parthenium; syn. Chrysanthemum parthenium (L.) Pers., Pyrethrum parthenium Sm.) Magyar: Őszi margitvirágok (Tanacetum parthenium) (Photo credit: Wikipedia)



What is  a Pyrethrum.

Pyrethrum  is  a  member  of  the Chrysanthemum cinerariifolium and Chrysanthemum coccineum. family  the  head  are  dried  then  left  to  brew  for several  hours  until the  distilling  is  completed.


It is  best  to  buy  the  insecticide already  made  as  the  brewing  can  be  harmful to  humans

The chemical involved  is  called pyrethrins.One common example is permethrin. A common formulation of pyrethrin is in preparations containing the synthetic chemical piperonyl butoxide: this has the effect of enhancing the toxicity to insects and speeding the effects when compared with pyrethrins used alone. These formulations are known as synergized pyrethrins.

How  to  use

Pyrethum comes  in  many  forms

  • As  a  powder  esp  for  bed  bugs  and  ant  powder  to  get  into   nooks  and  crevices.
  • As  a  spray   for  plant  use  ( this  comes  with  a   another  chemical  that stops  the  insects  getting  immune  to  it )
  • or  a  smoke  bombs    for  green  houses


although  Pyrethin is  natural  product  the  mass  produced  pyrethrum  is  human made.Both  formed  can  form  side  affects  when  inhaled  like

  • respiratory  problem
  • rashes  on  the  skin   should    you  be  in  contact   with  it

Therefore  it  always  wise  to  use  protective  clothing    like

  • face mask
  • rubber  gloves
  • and  to  avoid  spraying  it  into  the  wind
  • and  to  avoid  spraying  around  any  water  supply
  • and  always  spray  last  thing  at  night  or  early  morning  before  the  bees  arrive

Now  you  can  get  Pyrethrins  mixed  DE  under  a  brand  name  called  perma -guard 21 perma-guard-d21-237x345 which  acts  as   bug  killer  and  insecticide   spray