lines = 'Number_of_Infected_Plants Number_of_Quadrats
0 38
1 57
2 68
3 47
4 23
5 9 
6 10
7 7 
8 3
9 4
10 2
11 1
12 1
13 0'
con = textConnection(lines)
DF = read.table(con, header=TRUE)
close(con)