Respected Syed Sir,

Pumpkins, Double coconut and Watermelons also produce large fruits. I think the largest fruit is produced by pumpkin. Please check the links given below.

http://www.oddee.com/item_96650.aspx

http://www.bbc.com/earth/story/20150114-the-biggest-fruit-in-the-world

http://environment.harvard.edu/news/faculty-news/biggest-ever-fruit-world-0

http://waynesword.palomar.edu/pljan96.htm

https://en.wikipedia.org/wiki/List_of_world_records_held_by_plants

Regards,

Dr. Arvind Singh

1.  The sweet tasting fruit weighed 34.6kg (76lb 4.4oz), measured 57.46 cm (22. 625 in) long and had a circumference of 121.28 cm on 8 August 2003. It was grown by George and Margaret Schattauer of Captai Cook, Hawaii, USA. Native to Western India, the fruit spread throughout South East Asia and first came to Hawaii in 1888.

2. Weighting 268.8 pounds, this watermelon made the cut as the world's largest watermelon. Grown at the Hope Farm Store by Lloyd Bright, his family has a long history with watermelons: they set world records in melon size in 1979 with a 200 pound melon and again in 1985 with one that weighed 260 pounds.

Maybe Jack fruits syed sir......

Arvind and Chennakesavulu:

Thank you so much for providing exhaustive and precise details about some of the largest Pumpkins and Watermelons on Earth. Sorry, actually there is some mistake in the question asked and some misunderstanding has crept in. The question should have been : Is Jackfruit the largest tree-borne fruit known on our planet?

As long as the fruits lie on the ground and allowed to grow under Gravity, extremely giant sizes are possible. But when the Fruits of Jackfruit grow (including lying on ground) and hang on stalk of the main trunk or branches of the tree - full gravitational force is concentrated on the stalk. As the fruit grows its surface area grows by factor of square whereas volume or weight increases by a factor of cube. The cross sectional area of the stalk which supports the hanging fruit must be strong enough. Imagine we double the size of the fruit, the cross sectional area of stalk would increase by square, that is 4X and the volume or weight of the fruit would increase by factor of cube that is 8X. This disparity in Nature demands an explanation for a critical size which a tree can afford to support hanging of the fruit before it breaks away from the stalk. Any idea?

Best

Syed

Khan:

Thanks for your interest in Jackfruit. In nature everything is governed by Mathematics (Constructional- and Functional Morphology). Jackfruit is probably the largest tree-borne fruit on our planet. The tensile strength of the stalk as dictated by the microstructure of the stalk besides geometry would also play a role in successfully supporting such a heavy-weight fruit (largest known to weigh 144 pounds). 

Best

Syed

Dear Dr. Jafar

The jackfruit is the largest tree-borne fruit, reaching as much as 35 kg in weight, 90 cm in length, and 50 cm in diameter.