TABLE 1.
Combined toxicity between short-term heat pretrement at 30°C and fipronil on 2nd instar larvae of DBM, Plutella xylostella (Linn.)
| Treatment | Duration of heat-pretreatment (h) | fipronil concentration (mg/L) | Mortality (Average±SE) |
|---|---|---|---|
| CK | 0 | 0 | 6.67± 6.67c |
| Tr1 | 2 | 0 | 7.04±3.53c |
| Tr2 | 4 | 0 | 6.67±6.67c |
| Tr3 | 8 | 0 | 10.00±5.77bc |
| Tr4 | 12 | 0 | 10.00±5.77bc |
| Tr5 | 0 | 0.39 | 49.63±8.25a |
| Tr6 | 2 | 0.39 | 40.00±5.77ab |
| Tr7 | 4 | 0.39 | 40.74±9.26ab |
| Tr8 | 8 | 0.39 | 39.26±3.23ab |
| Tr9 | 12 | 0.39 | 53.33±4.63a |
| Tr10 | 0 | 0.78 | 57.04±1.48a |
| Tr11 | 2 | 0.78 | 43.33±8.82a |
| Tr12 | 4 | 0.78 | 41.48±1.48ab |
| Tr13 | 8 | 0.78 | 43.60±3.96a |
| Tr14 | 12 | 0.78 | 60.00±5.77a |
| Tr15 | 0 | 1.56 | 60.00±5.77a |
| Tr16 | 2 | 1.56 | 56.70±1.68a |
| Tr17 | 4 | 1.56 | 51.11±8.89a |
| Tr18 | 8 | 1.56 | 57.41±4.90a |
| Tr19 | 12 | 1.56 | 73.33±3.33a |
| Tr20 | 0 | 3.13 | 60.74±3.23a |
| Tr21 | 2 | 3.13 | 57.41±4.90a |
| Tr22 | 4 | 3.13 | 55.56±8.01a |
| Tr23 | 8 | 3.13 | 58.52±1.48a |
| Tr24 | 12 | 3.13 | 72.59±2.59a |
| Tr25 | 0 | 6.25 | 70.00±0.00a |
| Tr26 | 2 | 6.25 | 66.67±6.67a |
| Tr27 | 4 | 6.25 | 74.44±10.08a |
| Tr28 | 8 | 6.25 | 69.26±5.15a |
| Tr29 | 12 | 6.25 | 75.56±7.29a |
Note: Data followed with the same lower case letter are not significantly different (P=0.05, Tukey’s F test). Same as below.