As a result of environmental protection regulations and virus transmission, mesh in vents are a hot item right now. Harmonica netting and Insect Filter are the two most obvious options for this. 

Wijnen Square Crops turned to SchermNed for the insect filter system for their 9 ha of lit-cultivation mini cucumbers. The diseases and pests in lit-cultivation mini cucumbers - mainly aphids (in relation to virus), bugs, caterpillars and thrips - are quite a challenge in this regard. With the insect filter, Wijnen is hoping for less chemical pest control, better biological balance and zero to minimal failures due to virus infestations.

Interested in the whole article on 'Harmonica netting versus Insect filter system'? Read it here.