In order to evolve your Wurmple in Pokémon GO, you need to collect 12 Wurmple Candy – it will then evolve into either a Cascoon or Silcoon. After collecting 50 more Wurmple Candy, they evolve into a Dustox and Beautifly, respectively. The gender of your Wurmple does not effect its evolution and neither does the time of day. To learn more about this process, click here.
Source: The Sun
Pokémon Blog 
The gender absolutely IS the determining source of wurmple, I have purposely tested the theory several times over and over and every time it’s the same out come.. A female wurmple (the circle symbol with a cross on the bottom) every time turned into a cascoon…. and then same with the male wurmples, every time I evolved the male (the circle symbol with an arrow pointing up towards the right) it became a silcoon…. I tried evolving 4 male wurmples and all 4 turned to silcoon, I also evolved 4 female wurmples which all 4 became cascoons. Give it a try let me know your outcome and if it’s same conclusion or was I wrong, but be honest since there’s no way to prove it unless you record the entire process which I wish I did but will do just for these purposes!
Good luck!
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Very interesting – thanks for sharing!
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just did a female and got a silcoon so no
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Reblogged this on Nitwit's World.
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This Wurmple is so cute!
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But which path will it choose? XD
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The girly butterfly form. lol
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