Incidence of a New Pest, the Cotton Mealybug Phenacoccus solenopsis Tinsley, on Sesame in North Ethiopia

Table 7

Means of cotton mealybug severity for oxen and tractor plowed sesame fields with 95% confidence limits.

Tillage device		Severity; (Grades 1–4)	s.e.	CV	95% confidence limits
					Lower	Upper
Oxen	48	3.24	0.14	4.35	2.96	3.51
Tractor	132	2.49	0.14	5.64	2.21	2.77
Total	180