Latitudinal variation in the phenological responses of eastern tent caterpillars and their egg parasitoids

2018 ◽  
Vol 44 (1) ◽  
pp. 50-61 ◽  
Author(s):  
Mariana Abarca ◽  
John T. Lill
Keyword(s):  
Egg Parasitoids ◽  
Latitudinal Variation ◽  
Tent Caterpillars

Latitudinal variation in responses of a forest herbivore and its egg parasitoids to experimental warming

Oecologia ◽  
2017 ◽  
Vol 186 (3) ◽  
pp. 869-881 ◽  
Author(s):  
Mariana Abarca ◽  
John T. Lill ◽  
Pablo Frank-Bolton
Keyword(s):  
Egg Parasitoids ◽  
Latitudinal Variation ◽  
Experimental Warming

scholarly journals Ectomycorrhizal impacts on plant nitrogen nutrition: emerging isotopic patterns, latitudinal variation and hidden mechanisms

2014 ◽  
Vol 18 (1) ◽  
pp. 96-107 ◽  
Author(s):  
Jordan Mayor ◽  
Mohammad Bahram ◽  
Terry Henkel ◽  
Franz Buegger ◽  
Karin Pritsch ◽  
...  
Keyword(s):  
Nitrogen Nutrition ◽  
Latitudinal Variation ◽  
Plant Nitrogen ◽  
Plant Nitrogen Nutrition

scholarly journals Latitudinal Variation in Ayu Egg Size

1993 ◽  
Vol 59 (12) ◽  
pp. 2087-2087 ◽  
Author(s):  
Kei'ichiroh Iguchi
Keyword(s):  
Egg Size ◽  
Latitudinal Variation

scholarly journals Rearing Trissolcus japonicus and Trissolcus mitsukurii for Biological Control of Halyomorpha halys

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 787
Author(s):  
Giuseppino Sabbatini-Peverieri ◽  
Christine Dieckhoff ◽  
Lucrezia Giovannini ◽  
Leonardo Marianelli ◽  
Pio Federico Roversi ◽  
...  
Keyword(s):  
Biological Control ◽  
Control Method ◽  
Egg Parasitoids ◽  
Halyomorpha Halys ◽  
Progeny Production ◽  
Asian Origin ◽  
Frequent Use ◽  
Trissolcus Japonicus ◽  
Cumulative Curves

Halyomorpha halys is a severe agricultural pest of Asian origin that has invaded many countries throughout the world. Pesticides are currently the favored control methods, but as a consequence of their frequent use, often disrupt Integrated Pest Management. Biological control with egg parasitoids is seen as the most promising control method over the long-term. Knowledge of the reproductive biology under laboratory conditions of the most effective candidates (Trissolcus japonicus and Trissolcus mitsukurii) for optimizing production for field releases is strongly needed. Rearing of these egg parasitoids was tested by offering three different host supply regimes using new emerged females and aged, host-deprived females in different combinations. Results showed a mean progeny per female ranging from 80 to 85 specimens for T. japonicus and from 63 to 83 for T. mitsukurii. Sex ratios were strongly female biased in all combinations and emergence rates exceeded 94% overall. Cumulative curves showed that longer parasitization periods beyond 10–14 days (under the adopted rearing regimes) will not lead to a significantly increase in progeny production. However, ageing females accumulate eggs in their ovaries that can be quickly laid if a sufficient number of host eggs are supplied, thus optimizing host resources. Our data showed that offering H. halys egg masses to host-deprived female Trissolcus once a week for three weeks allowed its eggs to accumulate in the ovary, providing the greatest number of offspring within a three week span.

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