scholarly journals Effect of Host Density on the Progeny Production of the Egg Parasitoids Ooencyrtus nezarae (Ishii) (Hymenoptera : Encyrtidae)

10.5109/19640 ◽  
2011 ◽  
Vol 56 (1) ◽  
pp. 71-74 ◽  
Author(s):  
Kyawt San Dar Aung ◽  
Masami Takagi ◽  
Yi Yi Myint ◽  
Kyaw Min Yun ◽  
Takatoshi Ueno
Keyword(s):  
Host Density ◽  
Egg Parasitoids ◽  
Progeny Production ◽  
Ooencyrtus Nezarae

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.

Parasitism, longevity and progeny production of six indigenous Kenyan trichogrammatid egg parasitoids (Hymenoptera: Trichogrammatidae) at different temperature and relative humidity regimes

2005 ◽  
Vol 15 (3) ◽  
pp. 255-270 ◽  
Author(s):  
A. Kalyebi ◽  
S. Sithanantham ◽  
W. A. Overholt ◽  
S. A. Hassan ◽  
J. M. Mueke
Keyword(s):  
Relative Humidity ◽  
Egg Parasitoids ◽  
Progeny Production

scholarly journals Masa hidup imago, progeni, dan kemampuan parasitisasi Anagyrus lopezi (De Santis) (Hymenoptera: Encyrtidae), parasitoid kutu putih singkong

2020 ◽  
Vol 16 (3) ◽  
pp. 138
Author(s):  
Juwita Suri Maharani ◽  
Aunu Rauf ◽  
Nina Maryana
Keyword(s):  
Adult Life ◽  
Host Density ◽  
Adult Emergence ◽  
Phenacoccus Manihoti ◽  
Adult Longevity ◽  
Host Feeding ◽  
Progeny Production ◽  
Males And Females ◽  
Feeding Development ◽  
Determine Effect

<p>Parasitoid <em>Anagyrus lopezi</em> (De Santis) (Hymenoptera: Encyrtidae) was introduced from Thailand into Indonesia in early 2014 to control the invasive cassava mealybug, <em>Phenacoccus manihoti</em> Matile-Ferrero (Hemiptera: Pseudococcidae). Research was conducted in laboratory with the objectives to determine effect of honey on adult longevity, to study fecundity, progeny production, and sex ratio, and to evaluate effect of increased host density to parasitization. Studies were carried out by exposing 3<sup>rd</sup> instar nymphs of mealybug to parasitoids. Effect of honey on adult longevity was done in the absence of hosts. Fecundity was measured by the number of mummies formed. Results showed that adult females lived for 3.7 days, while males lived for 3.2 days when only provided water. Adult longevity increased significantly when honey was provided. Parasitoids with access to 50% honey lived almost six to nine fold longer than those provided water. Over its adult life, <em>A. lopezi</em> parasitized 96–287 mealybugs with an average of 203.7 or 34.6% of hosts were parasitized, and 24.86% were killed through host feeding. Development from egg to adult emergence required 17.97 and 17.67 days for males and females respectively. The average number of offspring produced per female was 88.8 individuals, of which 56.9% were females. The number of hosts parasitized at densities varying from 2–100 cassava mealybugs corresponded to a type III functional response.</p>

scholarly journals Effect of Temperature on Egg Maturation and Longevity of the Egg Parasitoids Ooencyrtus nezarae(Ishii)(Hymenoptera: Encyrtidae)

10.5109/17807 ◽  
2010 ◽  
Vol 55 (1) ◽  
pp. 87-89
Author(s):  
Kyawt San Dar Aung ◽  
Keiji Takasu ◽  
Takatoshi Ueno ◽  
Masami Takagi
Keyword(s):  
Egg Parasitoids ◽  
Effect Of Temperature ◽  
Egg Maturation ◽  
Ooencyrtus Nezarae

scholarly journals Response of the egg parasitoids of the pine processionary moth to host density and forest cover at the southern edge of the range

2020 ◽  
Author(s):  
Khaled Bouzar‐Essaidi ◽  
Manuela Branco ◽  
Andrea Battisti ◽  
André Garcia ◽  
Maria Rosário Fernandes ◽  
...  
Keyword(s):  
Forest Cover ◽  
Host Density ◽  
Egg Parasitoids ◽  
Pine Processionary Moth ◽  
Processionary Moth

Parasitism potential of Diadegma argenteopilosa (Cameron) (Hymenoptera : Ichneumonidae), an internal larval parasitoid of Spodoptera litura (Fab.) (Noctuidae: Lepidoptera)

ENTOMON ◽  
2020 ◽  
Vol 45 (2) ◽  
pp. 123-128
Author(s):  
Akshay Mahesh Bhosale
Keyword(s):  
Spodoptera Litura ◽  
Host Density ◽  
Nutritional Requirement ◽  
Pest Species ◽  
Progeny Production ◽  
Mass Multiplication ◽  
Larval Parasitoid ◽  
Behavioral Studies ◽  
Percent Parasitism ◽  
Honey Solution

Diadegma argenteopilosa (Cameron) (Ichneumonidae: Hymenoptera) is an internal larval parasitoid of Spodoptera litura (Fab.) (Noctuidae: Lepidoptera), a notorious and polyphagus pest of pulses and vegetables in India. Attempt has been made to initiate their mass multiplication for successful biocontrol programme. Behavioral studies, food stuffs, host selection aspects plays a crucial role in mass multiplication of biocontrol agents. Therefore, present work was conducted to study the optimum host age, specificity and host density for maximum progeny production of the parasitoid under laboratory conditions and later their release in the field for the management of pest species. The parasitoid caused highest mortality in the pest larvae of second instars, 4 day old larvae were attacked most with high percent parasitism, 39.00%. Optimum density for maximum progeny production of D. argenteopilosa was 20, which generate maximum parasitism (43.00%). Host specificity by exposing the parasitoids towards different host species and analyse parasitoid preference by S. litura > Helicoverpa armigera (Hubner) > Mythimna separata Walker > Achaea janata (Linnaeus). Nutritional requirement of parasitoid was tested with different foodstuffs and found 50% honey best suited for maximum longevity 8.2 and 11.4 days for males and females respectively. The longevity ratio also female biased, 1: 1.39 (Male: Female). From the results it concludes that D. argenteopilosa fed with 50% honey solution, exposed to 3-5 day old caterpillars of S. litura at density of 20 gave maximum progeny production and effectively utilized in the biocontrol programme.

Natural parasitism of eggs of yellow stem borer, Scirpophaga incertulas Walker (Lepidoptera: Crambidae) in rice ecosystem at Tiruchirappalli, Tamil Nadu

ENTOMON ◽  
2020 ◽  
Vol 45 (3) ◽  
pp. 181-188
Author(s):  
T. Sharmitha ◽  
C. Gailce Leo Justin ◽  
S. Sheeba Joyce Roseleen ◽  
P. Yasodha
Keyword(s):  
Field Study ◽  
Tamil Nadu ◽  
Host Density ◽  
Stem Borer ◽  
Scirpophaga Incertulas ◽  
Egg Masses ◽  
Yellow Stem Borer ◽  
Rice Ecosystem ◽  
Natural Parasitism

Three species of parasitoids viz., Telenomus dignus Gahan, Trichogramma japonicum, Ishii and Tetrastichus schoenobii Ferriere were recorded from the egg masses of rice yellow stem borer, Scirpophaga incertulas (Walker) in a field study. The extent of parasitism was high during Rabi (43.33 – 93.33 %) and low during Kharif (0 - 40.00 %). Parasitism by T. dignus was maximum in October (50.00 %), T. japonicum, in November (23.08 %) and T. schoenobii in February (55.55 %). dignus and T. schoenobii in combination parasitized maximum number of egg masses (41.82 %). Multiple parasitism by the three species was high in December (8.33 %) and January (7.14%). Parasitic potential was maximum, when T. schoenobii alone parasitised the egg masses followed by T. dignus and T. schoenobii in combination. Host density in the field influenced the extent of parasitism.

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