Efeito da escassez de alimento no desenvolvimento pós-embrionário e no potencial reprodutivo de Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) em laboratório

Angelini, Marina Robles; Freitas, Sérgio de

doi:10.1590/s0006-87052006000100017

Bragantia

2006

DOI: 10.1590/s0006-87052006000100017

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Efeito da escassez de alimento no desenvolvimento pós-embrionário e no potencial reprodutivo de Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) em laboratório

Marina Robles Angelini

Sérgio de Freitas

Abstract: RESUMOAs conseqüências da escassez alimentar no período pós-embrionário e potencial reprodutivo de Chrysoperla externa (Hagen) em laboratório foram avaliadas. Larvas de 1.°, 2.º e 3.° ínstares receberam alimento apenas no 1.°, 2.º ou 3.° dia após a ecdise. Nos períodos em que antecederam ou sucederam os testes com os respectivos ínstares, as larvas receberam uma, duas e três unidades de alimentação (UA) a cada dois dias para o 1.°, 2.º e 3.° ínstares, respectivamente. Cada UA constou de um disco de cartolina c… Show more

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“…Success of the lacewings in integrated pest management depends on the ability of the insect to survive and reproduce in the places where they are released (Angelini & Freitas 2006). This may explain why lacewing populations sometimes grow while the plants are in flower.…”

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confidence: 99%

Can larval lacewings Chrysoperla externa (Hagen): (Neuroptera, Chrysopidae) be reared on pollen?

Oliveira¹,

Souza²,

Auad³

et al. 2010

Rev. Bras. entomol.

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ABSTRACT. Can larval lacewings Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) be reared on pollen? The aim of this study was to verify the viability of exclusive use of elephant grass pollen, Pennisetum purpureum (Schum), to feed larvae of the lacewing Chrysoperla externa (Hagen, 1861). The insects were kept at 24ºC and the duration and survival rate of each instar and the larval and pupal phases were recorded. The diet provided complete development of the larvae. The average duration of the first and second instars was the same (6.9 days), while the third instar lasted an average of 10.0 days and the pupal phase 13.2 days. The average survival of the larvae was above 80% for the first, second and third instars, and 70.0% and 33.3% for the larval and pupal phase, respectively. These results indicate that the exclusive use of elephant grass pollen can provide complete development of the immature stages of this predator.KEYWORDS. Diet; green lacewing; mass rearing. RESUMO. Larvas de Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) podem ser criadas com pólen? O objetivo do presente estudo foi verificar a viabilidade do uso exclusivo de pólen de capim-elefante Pennisetum purpureum (Schum) como dieta para larvas de Chrysoperla externa (Hagen, 1861). Os insetos foram mantidos a 24ºC, avaliando-se a duração e a sobrevivência em cada instar e em todo o estágio larval e pupal. Verificou-se que a dieta proporcionou o desenvolvimento completo das larvas do crisopídeo, que apresentaram a mesma duração média para o primeiro e segundo ínstares (6,9 dias) e permaneceram 10,0 e 13,2 dias no terceiro instar e no estágio pupal, respectivamente. A sobrevivência média das larvas de C. externa foi superior a 80% para o primeiro, segundo e terceiro ínstares, e de 70,0% e 33,3% para o estágio larval e pupal, respectivamente. Verificou-se que o uso exclusivo de pólen de capim-elefante como alimento para larvas de C. externa proporcionou o completo desenvolvimento dos estágios imaturos do predador.

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mentioning

confidence: 99%

Can larval lacewings Chrysoperla externa (Hagen): (Neuroptera, Chrysopidae) be reared on pollen?

Oliveira¹,

Souza²,

Auad³

et al. 2010

Rev. Bras. entomol.

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Effect of temperature on the interaction between Chrysoperla externa (Neuroptera: Chrysopidae) and Sipha flava (Hemiptera: Aphididae)

Oliveira¹,

Auad²,

Souza³

et al. 2010

Eur. J. Entomol.

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Abstract. This paper examines some biological aspects and the predatory capacity of Chrysoperla externa fed nymphs of Sipha flava and reared at different temperatures. Recently hatched larvae were placed individually in Petri dishes, fed ad libitum with S. flava and reared at either 12, 16, 20, 24, 28 or 32 ± 1°C, a RH of 70 ± 10% and a 12-h photophase. The experiment was fully randomized with 30 replicates of each treatment. The duration and survival in each instar, and larval and pupal stages (pre-pupa + pupa) were analyzed. To determine the predatory capacity of larvae they were each provided daily with three-day-old nymphs of the aphid, in a number greater than they could consume. Ninety C. externa larvae were kept individually in Petri dishes at 24 ± 1°C, and their daily consumption recorded during development. Temperature influenced the rate of larval and pupal development. There was a decrease in the duration of development with increase in temperature. Regression analyses, based on quadratic equations, were used to describe the effect of temperature on the duration of development in the different instars of C. externa. This revealed that the base temperature increased as the larvae developed towards the adult phase. The survival of larvae in the first and second instars was similar at 12, 16, 20, 24, 28 and 32°C but none of the third instar larvae completed their development at 12°C and 32°C. The average daily and total consumption of aphids by third instar larvae was about 48 times greater than that of first instar larvae. The larvae ate an average of 10, 37 and 479 aphids in the first, second and third instars, respectively.

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Efeito da escassez de alimento no desenvolvimento pós-embrionário e no potencial reprodutivo de Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) em laboratório

Cited by 2 publications

References 5 publications

Can larval lacewings Chrysoperla externa (Hagen): (Neuroptera, Chrysopidae) be reared on pollen?

Can larval lacewings Chrysoperla externa (Hagen): (Neuroptera, Chrysopidae) be reared on pollen?

Effect of temperature on the interaction between Chrysoperla externa (Neuroptera: Chrysopidae) and Sipha flava (Hemiptera: Aphididae)

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