delete from pattern to pattern if it contains match

[harirammanohar at gmail.com]

HI All, 

can you help me out in doing below. 

file: 
<start> 
 guava 
fruit 
<end> 
<start> 
 mango 
fruit 
<end> 
<start> 
 orange 
fruit 
<end> 

need to delete from start to end if it contains mango in a file...

output should be: 

<start> 
 guava 
fruit 
<end> 
<start> 
 orange 
fruit 
<end> 

Thank you