Mudas de bananeira ‘williams’ tratadas com fertilizante protector nm®

Abstract

In the recent past, nematode control alternatives in the banana plantations consisted of highly toxic agricultural pesticides. In recent years, several products with greater environmental appeal have been launched, however, there is a lack of information on the effectiveness of new products. The objective of this work was to evaluate the vegetative characteristics of 'Williams' banana seedlings infested with nematodes and treated with Counter® and Fertilizer Protector NM®, three experiments were carried out. In experiment 1, meristem seedlings were planted in pots with six liters of soil naturally contaminated with nematodes, treated with different doses of fertilizer and conducted for 70 days. The four treatments, lack of application, Protector NM® 6 L ha-1 , 9 L ha1 and 12 L ha-1 , were arranged in a completely randomized design (CRD), with 11 replicates of one plant per plot. The application of 6 L ha-1 of Protector NM® , provided higher values of fresh and dry mass of the aerial part plus rhizome, diameter of the collar of the plant and height of the leaf rosette in the seedlings of 'Williams' banana tree compared to the absence of application.Fertilizer use did not influence the reduction of the nematode population. In experiment 2, meristem seedlings were planted in plastic bags with four liters of soil contaminated naturally with nematodes, treated with Terbufós and different doses of the fertilizer, and conducted in greenhouse for 81 days. The five treatments, lack of application, Terbufós (recommended dose by the manufacturer), Protector NM® 6 L ha-1 , 9 L ha-1 and 12 L ha-1 , were arranged in CRD, with seven replicates of one plant per plot. The plant height, number of leaves, pseudo stalk diameter, neck diameter and fresh mass were lower in the absence of application treatment in relation to the other treatments. The height of the plant was similar between the treatments Terbufós, Protector NM® 6 L ha-1 , 9 L ha-1 and superior to the treatment Protector NM® 12 L ha-1 . The diameter of the colon and the fresh mass were similar to each other in treatments Terbufós, Protector NM® 6 L ha-1 , 9 L ha-1 . For these variables, the Protector NM® treatment 9 L ha-1 , exceeded the Protector NM® treatment 12 L ha-1 . The dry mass was similar to each other in the non-application treatments and Protector NM® 12 L ha-1 . The amount of Helicotylenchus dihystera and Meloidogyne sp. (juveniles) in the soil and roots at the end of the experiment were similar to each other in all treatments. Experiment 3 consisted of four treatments, Terbufós (recommended dose by the manufacturer), Protector NM® 6 L ha-1 , 9 L ha - 1 and 12 L ha-1 , arranged in CRD, with four replicates of one plant per plot. Meristematic seedlings planted in plastic bags with four liters of naturally contaminated soil with nematodes, cultivated for 142 days, were used. The diameter of the plant collar, fresh shoot mass, fresh root mass and leaf rosette height were similar to each other in treatments Terbufós, Protector NM® 6 L ha-1 , 9 L ha-1 and above treatment Protector NM® 12 L ha-1 . For the number of leaves there was no difference between treatments. The amount of Helicotylenchus dihystera in roots was lower in the Counter® treatment compared to the other treatments, which were similar to each other. The amount of Meloidogyne sp. (juveniles) and eggs in roots was not influenced by the treatments.