Concentration (ppm) |
Concentration difference |
No. of alive larvae |
No. of dead larvae |
Mean death |
Mean death Concentration difference |
00 (control) 00 (check) 100 200 300 400 500 |
0 0 100 100 100 100 100 |
20 20 19 15 12 9 0 |
0 0 1 5 8 11 20 |
0 0 0.5 3 6.5 9.5 11,5 |
0 0 50 300 650 950 1150 |
Total 3100 |
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The LC50 value of the seed extract of Annona squamosa for 48 h has been determined according to the arithmetic method of Karber (1931). The calculation was done as following:
LC50 = 500 – 155
LC50 = 345ppm
