It is likely your kiwis are suffering from damage by thrips. These tiny kiwi fruit pests generally don’t kill the plant, but they can do their fair share of leaf damage, causing stunted growth when they suck out the succulent plant juices. Slender insects with fringed wings, thrips are often kept in check by blasting the affected areas with a strong stream of water. Insecticidal soap sprays are usually effective but must be repeated regularly.

Thank you for your response. I will try blasting with strong stream of water and see if that helps. 

Barbara

Thanks for your question.