scholarly journals Notes on the Ovipositional Behavior ofTrichogramma fuentesi(Hymenoptera: Trichogrammatidae), an Egg Parasitoid ofCactoblastis cactorum(Lepidoptera: Pyralidae)

2013 ◽  
Vol 96 (4) ◽  
pp. 1606-1608
Author(s):  
Oulimathe Paraiso ◽  
Stephen D. Hight ◽  
Moses T. K. Kairo ◽  
Stephanie Bloem
Keyword(s):  
Egg Parasitoid ◽  
Ovipositional Behavior ◽  
Lepidoptera Pyralidae

scholarly journals Trichogramma chilonis, an effective egg parasitoid for control of white stem borer Scirpophaga innotata (Walker), (Lepidoptera: Pyralidae) in rice

2021 ◽  
pp. 51-60
Author(s):  
Muhammad Yousif Rahimoon ◽  
Abdul Ghani Lanja ◽  
Aslam Bukero ◽  
Babar Hussain Chang ◽  
Jamal-U-Ddin Hajano ◽  
...  
Keyword(s):  
Insect Pests ◽  
Field Studies ◽  
Stem Borer ◽  
Egg Parasitoid ◽  
Control Agent ◽  
Management Program ◽  
Trichogramma Chilonis ◽  
The World ◽  
Parasitoid Population ◽  
Lepidoptera Pyralidae

Rice an important staple food crop of the world, which is attacked by the various insect pests, among them the stem borers are the most destructive pests, distributed in all rice growing areas of the world and cause the severe losses. This research investigated the efficacy of the parasitoid Trichogramma chilonis (Ishii) to control the white stem borer (Scirpophaga innotata) in rice. In this respect the field studies were conducted in lower Sindh, Pakistan for the year, Kharif - 2017 and 2018. Trichogramma egg parasitoid over 230 species are reported to have been remained in biological control of insect pests of over 200 insect species belonging to 70 different families, mainly the order Lepidoptera, Hemiptera, Orthroptera and Thysnoptera, in order to manage the white stem borer of rice the Trichogramma chilonis (Ishii) was used as a bio-control agent. The Studies revealed that T. chilonis proved an effective biocontrol strategy against white stem borer of rice. The result of this study could be useful in an integrated pest management program for the management of white stem borer of rice the Trichogramma chilonis. Keywords: Stem borer, Biocontrol, Parasitoid, Population suppression.

scholarly journals Ovipositional Behavior of the Egg Parasitoid Gryon pennsylvanicum (Hymenoptera: Scelionidae) on Two Squash Bug Species Anasa tristis (Hemiptera: Coreidae) and Anasa armigera: Effects of Parasitoid Density, Nutrition, and Host Egg Chorion on Parasitism Rates

2020 ◽  
Vol 49 (6) ◽  
pp. 1307-1315
Author(s):  
Mary L Cornelius ◽  
Bryan T Vinyard ◽  
Joseph D Mowery ◽  
Jing S Hu
Keyword(s):  
Electron Microscopy ◽  
Laboratory Tests ◽  
Egg Parasitoid ◽  
Egg Masses ◽  
Anasa Tristis ◽  
Ovipositional Behavior ◽  
Squash Bug ◽  
Percent Parasitism ◽  
Transmission Electron ◽  
Parasitism Rates

Abstract This study examined the ovipositional behavior of Gryon pennsylvanicum Ashmead (Hymenoptera: Scelionidae) on egg masses of two squash bug species Anasa tristis DeGeer and Anasa armigera Say (Hemiptera: Coreidae) by evaluating how parasitoid density and access to nutrition influenced percent parasitism on egg masses of different sizes in laboratory tests. When three parasitoids were exposed to A. tristis egg masses with only three to five eggs, 72.7% of parasitoids became trapped in the eggs and failed to emerge successfully. These results suggest that competition between larvae within the egg may have reduced the fitness of the surviving parasitoid. Continual access to honey water did not significantly influence parasitism rates on A. armigera egg masses and only increased parasitism on A. tristis egg masses with 20–25 eggs. Overall, parasitism rates were higher on A. armigera egg masses than on A. tristis egg masses, and parasitoids were more likely to emerge successfully from A. armigera eggs than from A. tristis eggs. Parasitoids spent the same amount of time probing eggs of the two species, but they spent significantly more time drilling into A. tristis eggs than A. armigera eggs. Measurements taken using transmission electron microscopy determined that the average combined width of the epicuticle and exocuticle of the egg chorion was significantly greater for A. tristis eggs than for A. armigera eggs. This difference may account for the lower rates of parasitism and parasitoid emergence and for the increased time spent drilling into A. tristis eggs compared with A. armigera eggs.

scholarly journals Natural parasitism of the second generation European corn borer eggs Ostrinia nubilalis (Hübner) (Lepidoptera, Pyralidae) by Trichogramma spp. in sweet corn fields in Vojvodina, Serbia – short communication

2017 ◽  
Vol 53 (No. 1) ◽  
pp. 50-54 ◽  
Author(s):  
Tancik Ján
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Egg Parasitoid ◽  
Trichogramma Evanescens ◽  
Corn Borer ◽  
North West ◽  
Egg Parasitism ◽  
Lepidoptera Pyralidae ◽  
Corn Fields ◽  
Natural Parasitism

Natural parasitism of the European corn borer eggs (Hübner) by Trichogramma spp. (Hymenoptera, Trichogrammatidae) was assessed in sweet corn field in north-west Serbia, region Vojvodina at the localities of Ruski Krstur, from 2004 till 2007. The rate of egg parasitism in 2004 varied from 35.89% to 73.58%. The parasitism in 2005 was lower than in 2004. On four different sampling dates in 2005 parasitism varied from 28.48% to 57.05% and averaged 39.4%. In 2006 parasitism fluctuated between 9.31 and 62.9%, averaging 32.15%. In 2007 parasitism varied from 36.8% to 54.54% and averaged 43.48%. The egg parasitoid species was identified as Trichogramma evanescens (Westwood). The study showed that this natural enemy occurred constantly in sweet corn fields but its number greatly fluctuated from year to year.

Quality control of Telenomus remus (Hymenoptera: Platygastridae) reared on the factitious host Corcyra cephalonica (Lepidoptera: Pyralidae) for successive generations

2017 ◽  
Vol 107 (6) ◽  
pp. 791-798 ◽  
Author(s):  
A.P. Queiroz ◽  
A. de Freitas Bueno ◽  
A. Pomari-Fernandes ◽  
M.L.M. Grande ◽  
O.C. Bortolotto ◽  
...  
Keyword(s):  
Quality Control ◽  
Egg Parasitoid ◽  
The Body ◽  
Corcyra Cephalonica ◽  
Factitious Host ◽  
Lepidoptera Pyralidae ◽  
Successive Generations ◽  
Lepidoptera Noctuidae ◽  
Telenomus Remus

AbstractEgg parasitoid rearing on factitious hosts is an important step to reduce costs and increase availability of the biocontrol agent but it requires quality control to achieve success in field conditions. To this end, this study evaluated the quality of Telenomus remus (Hymenoptera: Platygastridae) reared on Corcyra cephalonica (Lepidoptera: Pyralidae) for until 45 generations. In the first bioassay, we evaluated the body size of the laboratory-produced parasitoids. In the second bioassay, flight activity was examined, measuring the percentage of ‘flyers’, ‘walkers’ and ‘deformed’ parasitoids. The third bioassay assessed parasitism on Spodoptera frugiperda (Lepidoptera: Noctuidae) eggs. Our data indicate that the laboratory-reared parasitoid neither lost its ability to fly nor to parasitize S. frugiperda eggs. In conclusion, quality did not decrease significantly during 45 generations, and therefore rearing of T. remus on C. cephalonica as factitious host promises to be successful.

scholarly journals Selectivity of registered pesticides for the corn crop on immature stages of Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)

2019 ◽  
Vol 43 ◽  
Author(s):  
Tatiele Pereira dos Santos ◽  
Claubert Wagner Guimarães de Menezes ◽  
Carlos Henrique Batista ◽  
Eliane Souza Gomes Brito ◽  
Wagner de Souza Tavares ◽  
...  
Keyword(s):  
Biocontrol Agent ◽  
Zea Mays L ◽  
Positive Control ◽  
Egg Parasitoid ◽  
Negative Control ◽  
Trichogramma Pretiosum ◽  
Anagasta Kuehniella ◽  
Lepidoptera Pyralidae ◽  
Low Toxicity ◽  
Chemical Products

ABSTRACT Trichogramma pretiosum Riley, 1879 (Hymenoptera: Trichogrammatidae) is an egg parasitoid of lepidopteran pests in corn, Zea mays L. (Poaceae), in Brazil. Chemical products used in agriculture can be toxic to this biocontrol agent. The objective of the present study was to evaluate the longevity, parasitism and emergence of T. pretiosum parasitizing Mediterranean flour moth, Anagasta kuehniella Zeller, 1879 (Lepidoptera: Pyralidae), eggs treated with herbicide solutions with the active ingredients (chemical group) atrazine (triazines), paraquat dichloride (bipyridylium) and nicosulfuron (sulfonylurea). Pure distilled water was used as a negative control, and a solution of a product with λ-cyhalothrin + thiamethoxam (pyrethroid + neonicotinoid, respectively) was used as the positive control. The experimental design was completely randomized, with five treatments and 10 replicates. Anagasta kuehniella eggs were stored for two periods after treatment, 24 and 48 hours. These eggs were subjected to parasitism for two subjecting periods, 24 and 48 hours. The results were analysed statistically and classified according to the International Organization for Biological Control (IOBC). Atrazine and nicosulfuron reduced the longevity of T. pretiosum females. Nicosulfuron and the combination λ-cyhalothrin + thiamethoxam reduced the parasitism and emergence of this natural enemy. The paraquat dichloride-based herbicide was the least toxic and therefore represents a potential option for controlling weeds with low toxicity to the T. pretiosum parasitoid.

scholarly journals Laboratory Biological Parameters ofTrichogramma fuentesi(Hymenoptera: Trichogrammatidae), an Egg Parasitoid ofCactoblastis cactorum(Lepidoptera: Pyralidae)

2012 ◽  
Vol 95 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Oulimathe Paraiso ◽  
Stephen D. Hight ◽  
Moses T. K. Kairo ◽  
Stephanie Bloem ◽  
James E. Carpenter ◽  
...  
Keyword(s):  
Egg Parasitoid ◽  
Biological Parameters ◽  
Lepidoptera Pyralidae
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