Pests on Cucumbers

• Red spider mite can be a problem in a greenhouse.
• Avoid hot dry conditions when they will thrive.
• Treatments include spraying with fatty acid, oils and soaps as an insecticide.
• White fly and red spider mite may need a biological control of parasitic wasps or predatory mites respectively.

Powdery Mildew

• Powdery Mildew is the worst cucumber problem under glass badly affecting leaves
• Causes include Stressed plants by dry root conditions or high humidity.
• Excessive temperatures can create mildew.
• Use sulphur or fish oil fungicides and good husbandry.

Other Problems

• Water well and often but beware of rot on the roots. Soil should never be soggy
• All female varieties can be bitter and bloated if cross pollinated
• Do not grow Gherkins with cucumbers to Avoid cross pollination.
• Remove all male flowers without embryonic fruit at the base.

• Avoid splashing the fruit when you water
• Do not let cucumbers rest on the ground. Put on a tile or flat stone for them to rest on to avoid damage and rot

 

For vine weevil I am willing to use chemical treatment like Amazon’s Pbi Provado Vine Weevil treatment, if the squashing of the grubs is not good enough.