Parasitismo de ovos de Heliothis virescens por Trichogramma spp. pode ser afetado por cultivares de algodão

Andrade, Gilberto Santos; Pratissoli, Dirceu; Torres, Jorge B.; Barros, Reginaldo; Dalvi, Leandro Pin; Zago, Hugo Bolsoni

doi:10.4025/actasciagron.v31i4.808

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…Parasitoids such as Eulophidae (Hymenoptera) can be used to regulate populations of agricultural insect pests [17] , [18] . Effective use of these natural enemies in integrated pest management programs relies on good basic knowledge of the parasitoid's biology [19] , [20] , because the mass production of parasitoids for release depends on our being able to produce them in quantity within suitable hosts [21] .…”

Section: Introductionmentioning

confidence: 99%

Immunity of an Alternative Host Can Be Overcome by Higher Densities of Its Parasitoids Palmistichus elaeisis and Trichospilus diatraeae

et al. 2010

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Interactions of the parasitoids Palmistichus elaeisis Delvare & LaSalle and Trichospilus diatraeae Cherian & Margabandhu (Hymenoptera: Eulophidae) with its alternative host Anticarsia gemmatalis (Hübner) (Lepidoptera: Noctuidae) affect the success or failure of the mass production of these parasitoids for use in integrated pest management programs. The aim of this study was to evaluate changes in the cellular defense and encapsulation ability of A. gemmatalis pupae against P. elaeisis or T. diatraeae in adult parasitoid densities of 1, 3, 5, 7, 9, 11 or 13 parasitoids/pupae. We evaluated the total quantity of circulating hemocytes and the encapsulation rate versus density. Increasing parasitoid density reduced the total number of hemocytes in the hemolymph and the encapsulation rate by parasitized pupae. Furthermore, densities of P. elaeisis above 5 parasitoids/pupae caused higher reduction in total hemocyte numbers. The encapsulation rate fell with increasing parasitoid density. However, parasitic invasion by both species induced generally similar responses. The reduction in defensive capacity of A. gemmatalis is related to the adjustment of the density of these parasitoids to their development in this host. Thus, the role of the density of P. elaeisis or T. diatraeae by pupa is induced suppression of cellular defense and encapsulation of the host, even without them possesses a co-evolutionary history. Furthermore, these findings can predict the success of P. elaeisis and T. diatraeae in the control of insect pests through the use of immunology as a tool for evaluation of natural enemies.

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Section: Introductionmentioning

confidence: 99%

Immunity of an Alternative Host Can Be Overcome by Higher Densities of Its Parasitoids Palmistichus elaeisis and Trichospilus diatraeae

et al. 2010

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“…Parasitoids are studied because of their importance in the biological control of pests and are used in the development of population models and interactions with their hosts in the field (Hassel 2000, Andrade et al 2009Andrade et al , 2010a. Internal and external factors can influence the reproductive success and the strategy used by parasitoids, which are the basic components that should be considered for using these biological control agents (Ozkan 2007, Spataro and Bernstein 2007, Santolamazza-Carbone et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Oogenesis pattern and type of ovariole of the parasitoid Palmistichus elaeisis (Hymenoptera: Eulophidae)

Andrade

Sousa

Santos

et al. 2012

An. Acad. Bras. Ciênc.

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The knowledge on ovigeny in parasitoids is important for basic studies on physiology and applied biological control. The ovigeny pattern and type of ovariole of the parasitoid Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) were studied in newly-emerged females at seven, 14, 24 and 48 h intervals after their emergence from Tenebrio molitor L. pupae (Coleoptera: Tenebrionidae). Females of P. elaeisis presented ovaries composed by four ovarioles of the meroistic polytrophic type. The yolk accumulation and chorionogenesis in P. elaeisis were concluded 24 h after the female emergence. The 48 h-old females show a high quantity of egg ready for oviposition. These findings can help to improve the mass production of P. elaeisis and the augmentative biological control by using this natural enemy.

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“…These insects were reared at the Laboratory of Entomology in the Center of Agrarian Sciences at the University of Espirito Santo State (Centro de Ciências Agrárias da Universidade Federal do Espírito Santo-CCA-UFES), Alegre, Espírito Santo State, Brazil, with the alternative host, Anagasta kuehniella Zeller (Lepidoptera: Pyralidae), on a diet of integral wheat flour (67%), maize flour (30%) and beer yeast (3%), at 25± 1°C, 70±10% r.h. and 12:12 (L:D) photoperiod (Andrade et al 2009;Pratissoli et al 2005;Vianna et al 2009). …”

Section: Methodsmentioning

confidence: 98%

Effect of azadirachtin on the control of Anticarsia gemmatalis and its impact on Trichogramma pretiosum

et al. 2010

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Anticarsia gemmatalis has great potential to reduce soybean productivity, and the egg parasitoid Trichogramma pretiosum is a major agent in the biological control of this pest in soybean fields. We show that azadirachtin is able to control velvetbean caterpillars in soybean plants and also that it has no effects on the parasitoid T. pretiosum. Soybean plants were sprayed with solutions containing control (water), 50 and 100 mg.l −1 of azadirachtin (AzaMax™ 12 g a.i. l −1 ). Third instar larvae of A. gemmatalis were confined to soybean plants after the spraying. Leaf consumption and larval mortality of A. gemmatalis were evaluated. Newly emerged females of T. pretiosum were placed for 24 h in tubes with a piece of cardboard containing the same doses of azadirachtin used against velvetbean caterpillars. After 24 h, cardboard with 20 eggs of A. gemmatalis was offered for parasitism during 24 h, and the emergence and sex ratio of progenies were determined. Azadirachtin at 50 or 100 mg.l −1 reduced leaf consumption and caused 100% mortality in A. gemmatalis larva. Azadirachtin did not negatively affect the parasitism, emergence or sex ratio of the progeny. This indicates that the product can be used with mass release of T. pretiosum to control A. gemmatalis.

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Parasitismo de ovos de Heliothis virescens por Trichogramma spp. pode ser afetado por cultivares de algodão

Cited by 3 publications

References 8 publications

Immunity of an Alternative Host Can Be Overcome by Higher Densities of Its Parasitoids Palmistichus elaeisis and Trichospilus diatraeae

Immunity of an Alternative Host Can Be Overcome by Higher Densities of Its Parasitoids Palmistichus elaeisis and Trichospilus diatraeae

Oogenesis pattern and type of ovariole of the parasitoid Palmistichus elaeisis (Hymenoptera: Eulophidae)

Effect of azadirachtin on the control of Anticarsia gemmatalis and its impact on Trichogramma pretiosum

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