How does pollination management differ between tomato and cucumber crops in greenhouses?

• A. Tomatoes are primarily wind-pollinated; cucumbers self-pollinate.
• B. Tomatoes often self-pollinate with vibration or warmth; cucumbers rely more on bees/entomophily; greenhouse pollination may require manual shaking or bumblebees.
• C. Both crops require no pollination in greenhouse.
• D. Cucumbers rely exclusively on wind pollination.

Answer: (B)

In greenhouses, pollination management reflects how each crop releases and transfers pollen. Tomatoes are typically self-pollinating, meaning the pollen from a flower can fertilize the same or nearby flowers without outside pollinators. To enhance this in a enclosed environment, growers use physical cues like gentle vibration or warmth to shake pollen loose and encourage contact with the stigma. That’s why pollination strategies often involve devices or methods that create vibration or warmth rather than relying on insects.

Cucumbers, however, rely more on proper pollinator activity. Their flowers require transfer of pollen from male to female flowers, and insects are the natural carriers. In a greenhouse, this usually means introducing pollinators such as bumblebees or honeybees, or employing manual pollination techniques (like brushing or shaking flowers) when insect activity is low, to ensure adequate fruit set.

So, the best approach is to harness self-pollination cues for tomatoes through vibration or warmth, while for cucumbers you emphasize insect-mediated pollination (with bees) and supplement with manual methods if needed.