Effect of nitrogen fertilization on giant-missionary-grass on the spittlebugs population dynamics

• Autor(a) principal: Chiaradia, Luís Augusto
• Data de Publicação: 2020
• Outros Autores: Miranda, Mario, Fedatto, Valter J., Nesi, Cristiano N.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Agropecuária Catarinense (Online)
• Texto Completo: https://publicacoes.epagri.sc.gov.br/rac/article/view/585
• topic: Axonopus catharinensis; adubação; Cercopidae

Spittlebug insects (Hemiptera: Cercopidae) reduce the yield and pastures quality. To study the effect of nitrogen fertilization on giant-grass-missionary (Axonopus catharinensis Valls) on population dynamics of these pests an experiment was carried in Epagri/Cepaf in Chapecó, Santa Catarina State, Brazil, from October 2008 to September 2011. The experimental design was a randomized block with seven treatments and five replications. The treatments were applications of pig manure (DLS) equivalent the doses of 100, 200, 300, 400 and 500 kg of N.ha-1 and two mineral fertilization with P2 O5 + K2 O (control) and N + P2 O5 + K2 O (standard) following the soil analysis recommendation. The evaluations were carried in the pasture two times a month counting nymph “foams” and spittlebug adults captured with entomological net. Fertilization of the giant-missionarygrass increases the spittlebugs population. Fertilization with annual doses ≥ 100kg of N.ha-1 favors the development of these insects.