Factors studied

Positive effects

Negative effects

- Less application of insecticides or fungicides.

- For some procedures, the physical barrier must be removed first.

- Increase in the arduousness of work when it is very hot under the shelter.

- Less fuel and insecticide/fungicide used.

- Need for investments depending on the type of barrier chosen and its quality.

- Reduced risk of virus transmission.

- In some cases, creation of a favorable microclimate to limit certain pests.

- Temperature rise in cool climates.

- Under certain conditions, creation of a microclimate favorable to bioaggressors or unfavorable to plant physiology.

- Better visual appearance if there is no insect attack.

- Less insecticide residues.

- If treatment, limitation of product drift.

- Less beautiful visual appearance if disease development due to microclimates.

- Reduction in the transfer of pollutants to the air and water thanks to the reduction in the use of insecticides and fungicides.

- Increase in the amount of waste.

- Reduction of fuel consumption if phytosanitary treatments are avoided.

- Increase if necessary to better ventilate the greenhouse due to the presence of nets.