Research Papers: Effects of Furadan 5G on Caturra Coffee Productivity

Abstract

The work was conducted in the area of Sarchi, Costa Rica. The objective was to test a chemical in an effort to help solve the problem of nematode damage on coffee (Coffea arabica L.) With this purpose, the nematicide was applied manually, twice a year, to the ground and at the following a.i. rates per plant: 0.75g, 1.5g, 2.25g, 3.0g with two untreated checks per replication. Plants treated were 3 years old. Treatments were evaluated on a clay soil with a pH of 6.0 and under cool and humid weather conditions. Initially, natural populations consisted of only Pratylenchus coffeae and Pratylenchus sp., as the do minant plant parasitic forms. First year's treatment did not show any positive effects on yields. At the end of the second year the results showed that all treatments were superior to the untreated checks. Best yields were obtained with the 1.5g rate of Furadan 5% granules per plant, however the investment versus profit ratio was better at the 0.75g rate. Negative effects were ob