Efeito de diferentes dietas sobre o desenvolvimento pós-embrionário de Chrysoperla defreitasi Brooks (Neuroptera: Chrysopidae)
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Data
2001-06-01
Autores
BIAGIONI, ALEXANDRE [UNESP]
FREITAS, SÉRGIO DE [UNESP]
Título da Revista
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Editor
Sociedade Entomológica do Brasil
Resumo
Avaliou-se o período pós-embrionário do predador Chrysoperla defreitasi Brooks alimentada com ovos de Sitotroga cerealella (Olivier) e Diatraea saccharalis (Fabricius) em condições de laboratório à temperatura de 25±2ºC, UR de 70±10% e fotofase de 14h. Os ovos do crisopídeo foram individualizados em tubos de vidro e, após a eclosão, as larvas foram alimentadas com as respectivas presas e mantidas em sala climatizada, sob condições controladas. O delineamento estatístico utilizado foi inteiramente casualizado com 150 repetições para cada dieta. As durações do 1º, 2º e 3º ínstar e da fase pupal foram, respectivamente, 3,4, 2,7, 3,5 e 11,9 dias para larvas alimentadas com D. saccharalis e 3,6, 2,8, 2,7 e 9,3 dias, quando a dieta oferecida foi ovos de S. cerealella. Larvas de crisopídeos alimentados com ovos de D. saccharalis levaram em média 21,5 dias para completar o desenvolvimento pós-embrionário, com 34,0% de adultos emergidos, enquanto que os alimentados com ovos de S. cerealella levaram 18,4 dias com 55,3% de adultos. Pode-se, pois, constatar que a melhor dieta para o desenvolvimento pós-embrionário de C. defreitasi foram os ovos de S. cerealella, sendo que insetos alimentados com esta dieta apresentaram período mais curto de desenvolvimento, maior viabilidade nos três ínstares larvais e no período pupal, produzindo maior número de adultos.
The post-embryonic period of the predator Chrysoperla defreitasi Brooks, fed on eggs of Sitotroga cerealella (Olivier) and Diatrea saccharalis (Fabricius) was evaluated under laboratory conditions at 25±2ºC temperature, 70±10% RU, and 14h photophase. The chrysopidae eggs were individualized in glass tubes and after eclosion the larvae were fed on the respective preys and maintained under controlled conditions in a climatic chamber. The experimental design used was completely randomized with 150 replications for each diet. The duration of the 1st, 2nd, and 3rd instars as well as of the pupal phase were 3.4, 2.7, 3.5, and 11.9 days, respectively, for the larvae fed on D. saccharalis and 3.6, 2.8, 2.7, and 9.3 days, respectively, when the diet provided was S. cerealella eggs. Chrysopidae larvae fed on eggs of D. saccharalis took an average of 21.5 days to complete the post-embryonic development, with 34.0% of adults emerged, while the individuals fed on S. cerealella eggs took 18.4 days in average, with 55.3% of adults emerged. Data allowed to conclude that the best diet for post-embryonic development of C. defreitasi are eggs of S. cerealella, since insects fed on that diet had a shorter development period, higher viability of the three larval instars as well as of the pupal stage, producing higher number of adults.
The post-embryonic period of the predator Chrysoperla defreitasi Brooks, fed on eggs of Sitotroga cerealella (Olivier) and Diatrea saccharalis (Fabricius) was evaluated under laboratory conditions at 25±2ºC temperature, 70±10% RU, and 14h photophase. The chrysopidae eggs were individualized in glass tubes and after eclosion the larvae were fed on the respective preys and maintained under controlled conditions in a climatic chamber. The experimental design used was completely randomized with 150 replications for each diet. The duration of the 1st, 2nd, and 3rd instars as well as of the pupal phase were 3.4, 2.7, 3.5, and 11.9 days, respectively, for the larvae fed on D. saccharalis and 3.6, 2.8, 2.7, and 9.3 days, respectively, when the diet provided was S. cerealella eggs. Chrysopidae larvae fed on eggs of D. saccharalis took an average of 21.5 days to complete the post-embryonic development, with 34.0% of adults emerged, while the individuals fed on S. cerealella eggs took 18.4 days in average, with 55.3% of adults emerged. Data allowed to conclude that the best diet for post-embryonic development of C. defreitasi are eggs of S. cerealella, since insects fed on that diet had a shorter development period, higher viability of the three larval instars as well as of the pupal stage, producing higher number of adults.
Descrição
Palavras-chave
Insecta, Chrysopidae, Biology, diet, Insecta, Crisopídeo, Biologia, dieta
Como citar
Neotropical Entomology. Sociedade Entomológica do Brasil, v. 30, n. 2, p. 333-336, 2001.