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Biologia de Plutella xylostella L. (Lepidoptera: Plutellidae) em cultivaresde couve-flor Neotropical Entomology
Chagas Filho,Norton R; Boiça Jr,Arlindo L; Alonso,Tania F.
This work was conducted to evaluate biological parameters of Plutella xylostella L. reared on leaves of several cauliflower genotypes under laboratory conditions. The experiment was set in a randomized block design and arranged in a 6 x 2 factorial (genotypes x generations). Leaf disks of the cultivars Barcelona, Verona, Piracicaba Precoce, Sharon, Silver Streak, and Teresópolis Gigante were placed in Petri dishes with 12 newly-hatched larvae. Leaf disks were initially changed after the fourth day, but daily afterwards until the larvae reached the pupal stage. The same procedure was adopted for the second generation. Twenty adults of each sex were separated from each genotype to evaluate their longevity, and 10 couples from each treatment were used to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Diamondback Moth; Resistance type; Crucifer.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000200017
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Food availability and larval density affect ovarian development in Plutella xylostella (L.) (Lepidoptera: Yponomeutidae) Anais da SEB
Castelo Branco,Marina; Gatehouse,Alexander G..
The effect of Diamondback Moth (Plutella xylostella L.) population density and plant age on the rate of ovarian development was investigated. In tests carried out in Petri dishes, the density of larvae/leaf disk affected the rate of ovarian development. A high proportion of moths from larvae reared on leak disks from two or four-month-old spring cabbage at a density of seven or 14 larvae/leaf disk were mature at emergence. But moths reared at the same type of plant at a density of 28 larvae/leaf disk were largely immature at emergence. When the larvae were reared at a density of 30 larvae/plant on two or four-month-old spring cabbage plants, a high proportion of females were mature at emergence. Crowding has an important effect on the rate of ovarian...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Diamondback Moth; Ovarian development; Migration.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000400004
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