Evaluation and validation of the polycultural system of tomatoes and beans as a part of an integrated pest management programme for tomatoes, in Nicaragua.
The results of field studies carried out in Nicaragua in 1982-83 on the use of a tomato and bean polyculture as part of an integrated pest management programme are presented. The use of beans as a companion crop did not affect the yield of tomatoes and the intercrop bean yield was 75% of monocultural production. The association of these crops reduced the attack of 3 principal tomato pests, Heliothis spp., Spodoptera spp. and Liriomyza sativae. The intercropping had no effect on tomato diseases. An economic analysis showed that the polyculture was 2.2-1.1 times more profitable than a tomato monoculture.