Field Efficacy of Nicotiana tabacum L. var Virginia Extract against Coffee Borer Beetle (Hypothenemus hampei) Attacking Coffee Berries in Plantation Area

Table 4

The efficacy level of EHRE-Nt^† against coffee borer beetle attacks.

EHRE-Nt^† formulation	Efficacy level as a bioinsecticide (%)
E1^‡	66.14
E2^§	75.71
E3^⊥	85.42

^†The ethanolic heat reflux extract of N. tabacum L. var Virginia origin of Ponorogo. ^‡150 ml EHRE-Nt in 100 l of water. ^§300 ml EHRE-Nt in 100 l of water. ^⊥450 ml EHRE-Nt in 100 l of water.