Uso de diferentes espécies de plantas de cobertura e de bionematicida na população de fitonematóides presentes no solo

Abstract

Nematodes cause damage to producers in all production chains. Population control with the use of nematicides is time consuming and requires more than one application, which becomes a relatively expensive operation and can lead to imbalances in the soil fauna. The adoption of non-host cover crops to the rotation system, in addition to collaborating in the suppression of the nematode population, presents several benefits to soil physics, chemistry and biology. Given this scenario, the objective of the experiment was to evaluate the action of different cover crops, associated or not with the use of a biological nematicide, in reducing the population of nematodes. The experiment was carried out in the field, in a randomized block design (CBD), in a 6 (cover crops) x 2 factorial scheme (with or without biological nematicide), totaling 12 treatments repeated in four blocks, totaling 48 plots. The treatments used were: T1- Crotalaria ochroleuca, T2- Crotalaria juncea, T3- Crotalaria spectabilis, T4- Cajanus cajan T5- Pennisetum glaucum, T6- fallow, T1N- C. ochroleuca + Nematicide (No- nema), T2N- C. juncea + Nematicide (No-nema), T3N- C. spectabilis + Nematicide (No-nema), T4N- Cajanus cajan + Nematicide (No-nema), T5NPennisetum glaucum + Nematicide (No-nema), T6N-fallow + Nematicide (No-nema). The population of nematodes we counted before the implementation of the experiment and when the cover crops started senescence. It was possible to verify that there was no reduction in the population of nematodes using different cover crops, associated or not with the use of a biological nematicide.