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Egyptian Journal of Biological Pest Control

Table 3 Toxicity values of DL2 and DL6 isolates to 4th instar nymphs of Schistocerca gregaria using leaf dipping bioassay technique

From: Phylogenetic characteristics of novel Bacillus weihenstephanensis and Pseudomonas sp. to desert locust, Schistocerca gregaria Forskål (Orthoptera: Acrididae)

Isolate

N

Slope (SE)

LC50ab

χ2 (df)c

95% FL

Toxicity indexd

DL2

180

2.19 (0.35)

35 × 106b

1.65 (3)

25 × 106–45 × 106

37.14

DL6

180

1.19 (0.26)

13 × 106a

1.92 (3)

60 × 105–20 × 106

100

  1. aLC50’s reported in cfu’s
  2. bLC50’s followed by the same letter are not significantly different based on overlap of their 95% fiducial limits (P < 0.05)
  3. cL.R. chi-square goodness-of-fit values. Tabular values at P = 0.05 for 3 df = 7.81
  4. dToxicity index (Sun, 1950) = (LC50 of the most efficient compound (as Standard)/LC50 of the other tested compound) *100
  5. N refers to total number of insects in treatment
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