What is the ideal temperature range for fruit set?

What is the ideal temperature range for fruit set?

• A. 18-24C
• B. 26-32C
• C. 34-38C
• D. 40-45C

Answer: (B)

Temperature during flowering and fruit set strongly influences pollen viability and fertilization. Pollen and pollen-tube growth work best in warm, moderate conditions, roughly in the mid-20s to low-30s Celsius. If it's cooler, fertilization slows and set drops; if it gets too hot, pollen viability and stigma receptivity can decline, leading to poor fruit set. So the range around 26–32°C provides the best balance for successful fruit set, while cooler ranges are less favorable and very hot ranges reduce set.

Temperature during flowering and fruit set strongly influences pollen viability and fertilization. Pollen and pollen-tube growth work best in warm, moderate conditions, roughly in the mid-20s to low-30s Celsius. If it's cooler, fertilization slows and set drops; if it gets too hot, pollen viability and stigma receptivity can decline, leading to poor fruit set. So the range around 26–32°C provides the best balance for successful fruit set, while cooler ranges are less favorable and very hot ranges reduce set.