Effectiveness of Tephrosia vogelii and Tephrosia candida Extracts against Common Bean Aphid (Aphis fabae) in Malawi

Table 1

Rating scale for aphid infestation and severity.

Rating	Incidence	Infestation/severity
1	0	No infestation
2	≤ 100	Slightly infested
3	≥ 200 but ≤ 300	Moderate
4	≥300 but ≤ 400	High infestation
5	≥ 400	Severe infestation

Source: adopted from Litsinger et al. [22].