The effect of Auxigro ph® + Greenplants Zn + Greenplants B in doses of 300 g, 0.5 L and 0.25 L ha-1 respectively by
foliar application was evaluated at two different application intervals: 25-31 days after transplant (DDT) and 28-34 DDT. These
treatments were compared with a commercial practice in the same planting lot at the Pura Vida Melons farm, located in Nicoya,
Guanacaste, Costa Rica. At the time of harvest, ten randomized replicates were evaluated, using ten linear meters as an
experimental unit; the number of fruits, number of plants, fruits per plant, weight per fruit and brix degrees per fruit were counted
to determine the effect of each treatment.
The application of the mixture at 28-34 DDT increased the average weight of the
fruit by 100 g; moreover, the harvest was 4% more uniform, concentrating 56% of the sizes of fruit in 8s, 9s and 10s, unlike the
commercial treatment that concentrated 32% of the production in mentioned sizes. The benefit-cost ratio of the biostimulation
strategy applied to the 28-34 DDT is $29.28 for each dollar invested, while the application of the mixture at 25-31 DDT did not
have an effect on the variables evaluated. It is concluded that the biostimulation strategy used is effective, although the moment
of application is crucial to biostimulate the plant and obtain benefits in the melon yield.