Survival, development and reproduction of Phenacoccus solenopsis em algodao tratado com caulim

The mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a cotton pest widespread in several cotton growing regions of Brazil, particularly in the semi-arid region of southwestern Bahia. The impact of kaolin on survival, development and reproduction of P. solenopsis was evaluated...

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Bibliographic Details
Published in:Brazilian journal of biology 2020-10, Vol.80 (4), p.711
Main Authors: Guedes, V.S, Silva, C.A.D, Zanuncio, J.C
Format: Article
Language:English
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Summary:The mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a cotton pest widespread in several cotton growing regions of Brazil, particularly in the semi-arid region of southwestern Bahia. The impact of kaolin on survival, development and reproduction of P. solenopsis was evaluated in the laboratory. The experiment was developed in a completely randomized design with two treatments: immature or newly emerged adults of P. solenopsis sprayed with kaolin and fed with cotton leaf discs treated with kaolin suspension (with kaolin) (T1) and immature or newly emerged adults of P. solenopsis sprayed with distilled water and fed with cotton leaf discs treated with distilled water (without kaolin) (T2). The kaolin suspension shortens the life cycle, increases the reproductive potential and population growth of the cotton mealybug, P. solenopsis and, therefore, it should be used with caution on cotton plants in regions with a history of occurrence of this pest. Keywords: biological traits, Gossypium hirsutum, mealybug, particle film, stimulatory effects. A cochonilha Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) e uma praga de algodao, amplamente, difundida em varias regioes produtoras do Brasil, particularmente, na regiao semiarida do sudoeste da Bahia. O impacto do caulim na sobrevivencia, desenvolvimento e reproducao de P. solenopsis foi avaliado em laboratorio. O delineamento experimental foi inteiramente casualizado com dois tratamentos: imaturos ou adultos recem-emergidos de P. solenopsis alimentados com discos foliares de algodao tratados com caulim (com caulim) e pulverizadas com este produto (T1) e imaturos ou adultos recem-emergidos de P. solenopsis alimentados com discos foliares de algodao tratados com agua destilada (sem caulim) e pulverizacao dos insetos com agua destilada (T2). A suspensao do caulim encurtou o ciclo de vida, aumentou o potencial reprodutivo e o crescimento populacional da cochonilha-do-algodoeiro, P. solenopsis e, portanto, deve ser utilizado com cautela em plantas de algodao em regioes com historico de ocorrencia desta praga. Palavras-chave: caracteristicas biologicas, Gossypium hirsutum, cochonilha, filme de particulas, efeito estimulante.
ISSN:1519-6984
1678-4375
DOI:10.1590/1519-6984.216184