Effects of Temperature on Eggs, Fecundity, and Adult Longevity of Hylobius transversovittatus Goeze (Coleoptera: Curculionidae), a Biological Control Agent of Purple Loosestrife

1999 ◽  
Vol 15 (2) ◽  
pp. 162-167 ◽  
Author(s):  
T.J McAvoy ◽  
L.T Kok
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Control Agent ◽  
Purple Loosestrife ◽  
Adult Longevity ◽  
Hylobius Transversovittatus ◽  
Effects Of Temperature

Parasitism of a successful weed biological control agent, Neogalerucella calmariensis

2009 ◽  
Vol 141 (6) ◽  
pp. 609-613 ◽  
Author(s):  
Kathryn Norman ◽  
Naomi Cappuccino ◽  
Mark R. Forbes
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Parasite Load ◽  
Control Agent ◽  
Purple Loosestrife ◽  
Weed Biological Control ◽  
Eastern Ontario

AbstractWe investigated parasitism of the purple loosestrife beetle, Neogalerucella calmariensis (L.) (Coleoptera: Chrysomelidae), an introduced weed biological control agent, at 13 sites in eastern Ontario and western Quebec, Canada. Beetles were parasitized by gregarine gut protozoans (Apicomplexa: Eugregarinida) and much less commonly by nematodes (Nematoda: probably Mermithidae) and ectoparasitic mites (Acari: Erythraeidae). Female beetles had more gregarines than did males and the gregarine load was marginally higher in individuals from the original release sites than in individuals from recently colonized sites. Despite its overall success as a biological control agent, N. calmariensis harbours a substantial parasite load.

Oviposition Site Preferences ofGalerucella calmariensisandG. pusilla, Biological Control Agents of Purple Loosestrife (Lythrum salicaria)

1997 ◽  
Vol 11 (4) ◽  
pp. 824-827 ◽  
Author(s):  
Cory John Lindgren
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Control Agent ◽  
Lythrum Salicaria ◽  
Oviposition Site ◽  
Purple Loosestrife ◽  
Biological Weed Control ◽  
Flower Buds ◽  
Egg Masses ◽  
Site Preferences

Oviposition site preferences forGalerucella calmariensisandG. pusilla, biological weed control agents against purple loosestrife, were examined in 1994 and 1995. The leaves, stems, axils, and flower buds (G. pusilladid not oviposit on flower buds) were found to be the preferred oviposition sites. Oviposited egg masses may be used as a parameter within a biological control monitoring plan, providing information onGalerucellaestablishment and/or presence, estimating future population size, and providing biological control agent dispersal information. Monitoring for egg masses should concentrate on host plant leaves, where over 56% of all egg masses were oviposited.

scholarly journals Effect of Temperature on Life History and Parasitization Behavior of Trichogramma achaeae Nagaraja and Nagarkatti (Hym.: Trichogrammatidae)

Insects ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 482
Author(s):  
Modesto del Pino ◽  
Juan Ramón Gallego ◽  
Estrella Hernández Suárez ◽  
Tomás Cabello
Keyword(s):  
Biological Control ◽  
Life Table ◽  
Biological Control Agent ◽  
Control Agent ◽  
Intrinsic Rate Of Increase ◽  
Adult Longevity ◽  
Type I ◽  
Net Reproductive Rate ◽  
Rate Of Increase ◽  
Trichogramma Achaeae

Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) is currently used as biological control agent for several lepidopteran pests. Knowledge of thermal requirements is essential to optimize its rearing procedures and inundative releases. The biological characteristics and two-sex life table parameters of T. achaeae were determined at five constant temperatures (15, 20, 25, 30, and 35 °C) using Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs. T. achaeae was able to develop and survive from 15 °C to 30 °C, but not at 35 °C. Temperature significantly affected the preadult development time and adult longevity, decreasing when temperature increased from 15 °C to 30 °C. Temperature significantly altered the sex ratio, being female biased between 15 °C and 25 °C. Age-stage, two-sex life table analysis indicated that net reproductive rate (R0) was highest at 20 °C. Both the intrinsic rate of increase (r) and finite rate of increase (λ) increased with increasing temperature, while the mean generation time (T) decreased significantly. In addition, functional response of T. achaeae was studied, being significantly affected by temperature and host egg density, displaying a Holling type-I at 15 °C and a Holling type-II at 25 °C. The relevance of these results is discussed for the use of T. achaeae as biological control agent.

scholarly journals Insecticidal activity of isolated essential oils from three medicinal plants on the biological control agent, Habrobracon hebetor Say (Hymenoptera: Braconidae)

2019 ◽  
Vol 63 (1) ◽  
pp. 63-68
Author(s):  
Mohammad Asadi ◽  
Hooshang Rafiee-Dastjerdi ◽  
Gadir Nouri-Ganbalani ◽  
Bahram Naseri ◽  
Mahdi Hassanpour
Keyword(s):  
Biological Control ◽  
Essential Oil ◽  
Essential Oils ◽  
Biological Control Agent ◽  
Control Agent ◽  
Piper Nigrum ◽  
Adult Longevity ◽  
Offspring Sex Ratio ◽  
Habrobracon Hebetor ◽  
Glycyrrhiza Glabra L

The effects of Allium sativum L. (Alliaceae), Piper nigrum L. (Piperaceae) and Glycyrrhiza glabra L. (Fabaceae) essential oils were investigated on the biological control agent, Habrobracon hebetor Say. The female wasps of H. hebetor were treated by LC30 concentrations of the tested essential oils for 24 h and their demography was investigated. Results indicated that the adult longevity, survival, fecundity, fertility, hatch rate, offspring sex ratio and the other demographic parameters negatively were affected by these essential oils. At the same time, our findings indicated that G. glabra essential oil has the less severe effect on H. hebetor. Accordingly, G. glabra essential oil seems to be a compatible botanical compound with H. hebetor for applying in integrated pest management programs.

scholarly journals Biological Studies on Dipha aphidivora Meyrick (Pyralidae: Lepidoptera): A Potential Predator of Coconut Mealybugs in the Philippines

CORD ◽  
2010 ◽  
Vol 26 (2) ◽  
pp. 6
Author(s):  
J.C. Orense ◽  
M.L.R. Imperial
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Control Agent ◽  
The Philippines ◽  
Adult Longevity ◽  
Potential Predator ◽  
Larval Instars ◽  
Biological Studies ◽  
History Of ◽  
First Time

Dipha (Conobathra) aphidivora Meyrick (Pyralidae: Lepidoptera) is recorded for the first time as a predator of coconut mealybug, Sangicoccus sp. (Eriococcidae: Homoptera)) in the Philippines.  Some aspects of its biology and ecology were studied to determine its suitability as a biological control agent against Sangicoccus sp. The life history of D. aphidivora was investigated following the establishment of a rearing procedure. The incubation period of the egg was 4.64±0.70 days. The four larval instars larva were completed in 5.52±0.92, 3.40±0.91, 2.83±0.72 and 3.40±1.04 days, respectively. Adults emerged from pupae after 7.68± 0.99 days.  Adult longevity was 6.83 ± 2.30 days. The life cycle of D. aphidivora lasted for 32.42±3.63 days. Voracity tests showed that the four larval instars of the predator consumed an average of 150 mealybugs.

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