Behavior of cowpea genotypes (Vigna unguiculata L. Walp., Fabaceae) under Empoasca sp. (Hemiptera: Cicadellidae) and Liriomyza sp. (Diptera: Agromyzidae) infestation in Redenção, Ceará state, Brazil

Abstract

Cowpea (Vigna unguiculata L. Walp.) is an important Fabaceae used as a food source in several countries in Africa, Asia and the Americas. The objective of this research was to evaluate the susceptibility of 15 cowpea genotypes to the attack of green leafhopper Empoasca sp. and serpentine leaf miner (Liriomyza sp.). The experiment was conducted at the Experimental Piroás Farm (FEP) of the University of International Integration of Afro-Brazilian Lusophony (Unilab) from August to October 2018, where the experimental design was used in a randomized block design with fifteen treatments and four repetitions. For the leafhopper, the number of individuals per plant, randomly, in the useful plot, were evaluated once a week for nine weeks. For the mining company, the presence or absence of mines, in the useful and random part, was evaluated over four weeks. The data accumulated on the last date were transformed [(x + 0.5) ^1/2] and subjected to analysis of variance, the means being compared by the Scott-Knott test.The genotypes BRS Juruá, BRS Marataoã, Rabo de Soin, BRS Guariba, BR 17 Gurguéia, BRS Xiquexique, BRS Potengi, BRS Aracê, BRS Cauamé, BRS Imponente, BRS Itaim, BRS Tumucumaque and Vita-7 were less susceptible to the attack by Empoasca sp., while BRS Aracê, Rabo de Soin and Vita-7 were less attacked by Liriomyza sp.