Pests and diseases

Plant problems fall into three categories:

  1. Pests and parasites – any animals, birds or insects that actively damage plants
  2. Diseases – pathological conditions caused by micro organisms such as fungi, viruses or bacteria
  3. Cultural disorders – the effect of nutritional deficiencies
  • As a first step we recommend that all plotholders learn to distinguish and diagnose plant problems in order to treat the problem or prevent its re-occurrence.
  • As a second step we suggest plotholders seek advice from many available sources including neighbouring plotholders, informed gardening literature and the internet.
  • Look out for early warning signs – plants in distress, attack by pests or suffering disease or disorder
  • Check out poor growing conditions – lack of water, high/low temperatures, and insufficient light, damp, waterlogged soil
  • Control pests – remember it is often a fine line between friend and foe; there are ways to control pests that do not involve pesticides  – click here for an RHS document summarising such methods and include details where to source them from
  • Controlling disease – hygiene is the watchword from airborne and insect to human and equipment transmission

Pesticides and fungicides – organic and natural controls are preferred to synthetic regulated products

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