PARASITOLOGICAL ANALYSIS OF Lactuca sativa CULTIVATED WITH DIFFERENT ORGANIC FERTILIZERS

Abstract

Lettuce is commonly consumed in Brazil. It is mainly eaten in natura, and this is the reason why it is a vehicle of parasitic contamination. The objective of this work was to evaluate the parasitic contamination of three different organic fertilizers -filter cake (TF), manipueira (MA), and agricultural byproduct (RA) -, in Lactuca sativa cv. Valentina samples,using the following applications: TF/T1: no fertilizer, TF/T2: 3.6kg/m², and TF/T3: 7.2kg/m²; MA/T1: no fertilizer, MA/T2: 4.32L/m², and MA/T3: 8.64L/m²; and RA/T1: no fertilizer, RA /T2: 3.6 kg / m², and RA/T3: 7.2 kg/m². The leaves and capsules used in the research were washed with a 0.5% neutral detergent solution and these samples were subjected to Hoffman’s and Faust’s methods. The results of the analyses demonstrated that 100% of the samples were contaminated with Ancilostomydaelarvaeregardless of the fertilizer or concentration used. Ancilostomydaelarvae were only found with the following specifications: TF/T1 (83.33%), TF/T2 (66.66%), TF/T3 (50%), MA/T1 (66.66%), MA/T2 (83.33%), MA/T3 (33.33%), RA/T1 (80%), RA/T2 (60%), and RA/T3 (40.00%). Ancilostomydaelarvae associated with Ancilostomydaeeggs were found with TF/T1 (0%), TF/T2 (16.66%), TF/T3 (0%), MA/T1 (16.66%), MA/T2 (0%), MA/T3 (0%), RA/T1 (0%), RA/T2 (0%), and RA/T3 (0%). And Ancilostomydaelarvae associated with Taeniaeggs were found with TF/T1 (16.66%) TF/T2 (16.66%), TF/T3 (50%), MA/T1 (16.66%), MA/T2 (16.66%), MA/T3 (66.66%), RA/T1 (20%), RA/T2 (40%), and RA/T3 (60%). Considering the research results, we reinforce the need for sanitizing and controlling the means of contamination in vegetables grown for sale and consumed in naturato prevent parasitic infection in consumers.

Keywords

• lactuca sativa
• lettuce
• organic fertilizers