What humidity range is generally recommended to reduce fungal diseases in greenhouses?

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Multiple Choice

What humidity range is generally recommended to reduce fungal diseases in greenhouses?

Explanation:
Maintaining a moderate humidity level helps keep leaf surfaces from staying wet long enough for fungi to germinate and infect. A relative humidity around 60-70% provides a balance: it supports healthy plant transpiration and growth without creating the consistently damp conditions that many fungal pathogens need to establish themselves. Pushing humidity up toward 80-90% keeps surfaces damp longer, boosting fungal disease risk, while dropping toward 20-40% or 40-50% can stress plants and still not reliably minimize disease pressure. So, the 60-70% range is generally recommended to reduce fungal diseases while keeping plants healthy.

Maintaining a moderate humidity level helps keep leaf surfaces from staying wet long enough for fungi to germinate and infect. A relative humidity around 60-70% provides a balance: it supports healthy plant transpiration and growth without creating the consistently damp conditions that many fungal pathogens need to establish themselves. Pushing humidity up toward 80-90% keeps surfaces damp longer, boosting fungal disease risk, while dropping toward 20-40% or 40-50% can stress plants and still not reliably minimize disease pressure. So, the 60-70% range is generally recommended to reduce fungal diseases while keeping plants healthy.

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