Data/hora: 02/06/2024 07:08:25

Provedor de dados: | 82
País: | Brazil
Título: | Influência da densidade de ovos de Diaphania hyalinata (L.) (Lepidoptera: Crambidae) na capacidade de parasitismo de Trichogramma exiguum Pinto &amp;amp; Platner e Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae)
Autores: | Polanczyk,RA; Barbosa,WF; Celestino,FN; Pratissoli,D; Holtz,AM; Milanez,AM; Cocheto,JG; Silva,AF da.
Data: | 2011-04-01
Ano: | 2011
Palavras-chave: | Natural enemy; Egg parasitoid; Host and biological aspect.
Resumo: | The effects of the egg density of Diaphania hyalinata (L.) on several biological parameters of Trichogramma exiguum Pinto &amp;amp; Platner and T. pretiosum Riley were investigated. For that, 24h-old egg masses were isolated in glass tubes (15 replicates; 1 egg mass = 1 replicate), and offered to parasitization by a newly-emerged female of T. pretiosum or T. exiguum 24h at the proportion of one female to 5, 10, 15, 20, 25, 30, 35 and 40 eggs of D. hyalinata. The following parameters were evaluated: number of parasitized eggs, number of individuals per egg, viability and sex ratio. Trichogramma exiguum parasitized more eggs than T. pretiosum when more than 25 eggs were available per female. The percentage of emergence was satisfactory to T. pretiosum in densities up to 15 eggs/female and up to 20 eggs/female for T. exiguum. The number of individuals per egg was not statistically different in both species except in the density of 25 eggs/female. It can be concluded that T. exiguum performed better than T. pretiosum at larger clutch sizes, as T. exiguum parasitization capacity increased as a result of the size of the host clutch size.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000200013
Editor: | Sociedade Entomológica do Brasil
Relação: | 10.1590/S1519-566X2011000200013
Formato: | text/html
Fonte: | Neotropical Entomology  v.40 n.2 2011
Fonte: | info:eu-repo/semantics/openAccess