pests and diseases

Safety Equipment Image credit nexomundo.com ZIMSEC O Level Combined Science Notes: Safety wear

• Pesticides are dangerous and need to be handled with care.
• The following equipment ought to be used when handling chemicals depending on the instructions of each chemical’s label and its usage directions.

Tomato plant with red mite. Image credit thedemogadern.org ZIMSEC O Level Combined Notes: Pest Control

• Pests cause damage to plants and spread diseases.
• This results in a reduction in crop yields.
• Control measures can be taken to minimise this damage.
• The control measures can be either […]
  

Image credit incomdirect.com ZIMSEC O Level Combined Science Notes: Pesticide Warning Symbols

• Pesticides are graded according to their toxicity i.e.
• According to how harmful they are to humans.
• Every pesticide must have a label that clearly shows its “danger” level show.
• There are four common danger levels of chemicals.

Purple […]