Comparison of the farmers and families assigned to the two treatments showed the two groups were very similar in personal and family attributes and land resources (Table 1). The average age of farmers in the IPM and non-IPM treatments did not differ significantly (P ¼ 0.338). Mean farm sizes of the IPM and non-IPM groups did not differ significantly (P ¼ 0.030), nor did the area under vegetable cultivation (P ¼ 0.178). Family size, educational status and social group status are presented in Table 1, but were not compared statistically.