Dolichopodidae abundance in different cover crop species

• Autor(a) principal: Bortolotto,Orcial Ceolin
• Data de Publicação: 2022
• Outros Autores: Hoshino,Adriano Thibes, Silva,Katyuscia Cristine Kubaski, Capellari,Renato Soares, Menezes Junior,Ayres de Oliveira
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Ciência Rural
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000500301
• topic: conservation biological control; environmental management; biodiversity; natural enemies; attractive crop species

ABSTRACT: This study evaluated the Dolichopodidae abundance in different cover crop species. For this, the following species were used in treatments: Crotalaria (Crotalaria spectabilis), cowpea (Vigna unguiculata), sunflower (Helianthus annuus), castor bean (Ricinus communis) and buckwheat (Fagopyrum esculentum). The survey was carried out in a field during two seasons 2012/2013 (November/December to March) and 2013/2014 (October/November to February). The Dolichopodidae abundance were evaluated weekly using a sweep net and Moericke traps. In addition, the phytophagous abundance (Thysanoptera: Thripidae; Hemiptera: Aleyrodidae and Hemiptera: Aphididae) was quantified, to allow for an inference about density-dependence. In total, 13,987 long-legged flies (96.5% in Moericke traps) were captured, represented only by the species Condylostylus erectus Becker, 1922 (Diptera: Dolichopodidae). In general, the higher abundance of C. erectus was observed in buckwheat and cowpea. Regarding the phytophagous species, 48,371 individuals [Thripidae (77.5%), Aleyrodidae (20.2%), and Aphididae (2.5%)] were quantified and a clear correlation with the C. erectus population was not evidenced. Thus, these results suggested that buckwheat and cowpea make resources available to long-legged flies, as discussed in our research. Finally, the buckwheat and cowpea sowing are options to increase the abundance of C. erectus predator populations in agroecosystems.