Artículos INVAGROPECUARIAS FCAV

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Browsing Artículos INVAGROPECUARIAS FCAV by Author "Ana Damaris Avilés Quezada"

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    Carbamate and organophosphate residues in pineapple (Ananas comosus L.) fruits from a plantation in Sánchez Ramírez, Dominican Republic
    (2024) Ana Damaris Avilés Quezada; Pedro Antonio Núñez Ramos
    The main problem for pineapple (Ananas comosus L.) production in Sánchez Ramírez, Dominican Republic, is the high levels of applications of agrochemicals to improve the crop, increase productivity and control pests and diseases. The presence of pesticide residues in pineapple fruits is a matter of national interest, because it is a highly demanded product in the market. The accumulation of residues in pineapple demand more attention, since most of these fruits are consumed as fresh fruit and there is no information related to the presence or absence of pesticide residues in them. The study objective was to determine the effect of six management treatments of the pineapple plantation with and without application of growth hormone (Agrokin Plus®) on the presence of molecules and concentrations of carbamates and organophosphates. It was carried out on the farm of a producer from Las Cuevas, Cotuí, Sánchez Ramírez Province, Dominican Republic. A completely randomized design was used, with six treatments (Agrokin Plus® hormone at doses 0, 250, 400, 600, 800, and 1,000 mL ha-1 + agrochemical management for each treatment (T1, T2, T3, T4, T5 and T6, respectively) and four replications. The presence of pesticides was determined by the extraction of organophosphates and carbamates through the bioassay process. The data were analyzed with the InfoStat (2018) program, using the Kruskal Wallis test at 5%. The applied treatments significantly affected the pineapple fruit content of carbamates with a p (0.0202)<(alpha=0.05), but did not affect the organophosphate content with a value of p (0.0618)>(alpha=0.05). The results suggest the need to continue the monitoring processes for pesticide residues in pineapple fruits with an emphasis on maintaining the market and avoiding sanctions for exports.
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    Effect of the Agrokin Plus® hormone on the crop yield of pineapple (Ananas comosus L.) in Cotuí, Dominican Republic
    (2024) Ana Damaris Avilés Quezada; Pedro Antonio Núñez Ramos
    Pineapple (Ananas comosus L.) is one of the most important tropical fruits worldwide from an economic point of view. In Dominican Republic it is an export crop, using the required technologies and appropriate management techniques to satisfy its demand and conserve soil fertility. The objective of this study was to determine the effect of the Agrokin Plus® hormone on the performance and development of the ‘MD-2’ pineapple crop. A completely randomized design was used, with six treatments (Agrokin Plus® hormone at the doses 0, 250, 400, 600, 800, and 1,000 mL ha-1, for T1, T2, T3, T4, T5 and T6, respectively) and four replications. The data were analyzed using the InfoStat (2018) program, with an analysis of variance and a Duncan and Kruskal Wallis mean comparison test at 5%. The increasing dose of the Agrokin Plus® hormone significantly affected the length and number of leaves plant-1, the height of the plant (p>0.05), but did not affect the lengths of the peduncle and crown. The dose of the product applied affected the diameter and length of fruits, as well as yield. The results recommend the use of the higher doses studied – 800 and 1.000 mL ha-1. However, total soluble solids contents tend to reduce, requiring a special attention to the best fruit harvest point.