Assessment of the impact of insecticides on Anagrus nilaparvatae (Pang et Wang) (Hymenoptera: Mymanidae), an egg parasitoid of the rice planthopper, Nilaparvata lugens (Hemiptera: Delphacidae)

2008 ◽  
Vol 27 (3-5) ◽  
pp. 514-522 ◽  
Author(s):  
Huai Yin Wang ◽  
Yang Yang ◽  
Jian Ya Su ◽  
Jin Liang Shen ◽  
Cong Fen Gao ◽  
...  
Keyword(s):  
Nilaparvata Lugens ◽  
Egg Parasitoid ◽  
The Impact

scholarly journals Pengaruh Residu Insektisida Deltametrin Pada Tanaman Padi terhadap Tingkat Parasitasi Parasitoid Anagrus Nilaparvatae (Hymenoptera: Mymaridae)

2018 ◽  
Vol 2 (1) ◽  
pp. 9
Author(s):  
Araz Meilin ◽  
Y. Andi Trisyono ◽  
Damayanti Buchori
Keyword(s):  
Natural Enemies ◽  
Nilaparvata Lugens ◽  
Egg Parasitoid ◽  
Rice Plants ◽  
Indirect Impact ◽  
Gravid Females ◽  
The Impact

The impact of deltamethrin on natural enemies can be determined directly through contact and oral applications or indirectly through residues on plants. This research was aimed to determine the indirect impact of deltamethrin on the egg parasitoid of Anagrus nilaparvatae.  The rice plants of Cisadane variety were infested with 10 gravid females of N. lugens. Deltamethrin was applied at two concentrations (12.5 and 6.25 ppm) and at 7, 3, 1 day and 3 hours before the parasitization. Deltamethrin residues on rice plants were decrease the number of Nilaparvata lugens, parasitoid and  parasitization level of A. nilaparvatae. This suggests that deltamethrin residue on rice plants could decrease the role of A. nilaparvatae in controlling N. lugens.

scholarly journals Impact of Abamectin on Anagrus nilaparvatae, An Egg Parasitoid of Nilaparvata lugens

2018 ◽  
Vol 21 (2) ◽  
pp. 80 ◽  
Author(s):  
Edi Eko Sasmito ◽  
Y. Andi Trisyono ◽  
Tri Harjaka
Keyword(s):  
Rice Plant ◽  
Rice Variety ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Egg Parasitoid ◽  
Test Tube ◽  
Laboratory Conditions ◽  
First Instar ◽  
Parasitism Level ◽  
The Impact

Anagrus nilaparvatae (Hymenoptera: Mymaridae) is an egg parasitoid potential for controlling the major pests on rice, the brown planthopper (Nilaparvata lugens [Hemiptera: Delphacidae]).Abamectin is one of insecticides registered for N. lugens. The research was aimed to investigate the impact of contact application of abamectin on the parasitism level of A. nilaparvatae under laboratory conditions. Adults of A. nilaparvatae and the first instars as well as adults of N. lugens were exposed to the residue of abamection inside the test tube. A. nilaparvatae was much more susceptible to abamectin compared to N. lugens. Application of abamectin at the recommended concentration (22.78 ppm) for 30 min caused 100% mortality, and it reduced to 85% when the concentration was decreased to 0.36 ppm. In contrast, the mortality for the first instar of N. lugens was only 15% at 22.78 and no mortality at 0.36 ppm. No N. lugens adults died even when they were exposed to 22.78 ppm. Furthermore, the parasitism test was conducted using 38 days after planting of IR-64 rice variety. Those plants were infested with 50 females of N. lugens for 2 days. A. nilaparvatae were exposed by contact to 0.02, 0.23, and 2.28 ppm of abamectin. The survivors were released to the rice plant containing eggs of N. lugens. Contact application of abamectin reduced parasitism level of A. nilaparvatae as much as 86.34, 70.01, and 28.43% with concentrations of 2.28 ppm, 0.23 and 0.02 ppm, respectively. In addition, the number of parasitoids emerged decreased with increasing concentration of abamectin. These results suggest that abamectin could be detrimental to A. nilaparvatae due to direct mortality, reduced the parasitism level, and decreased the number of progeny produced. IntisariAnagrus nilaparvatae (Hymenoptera: Mymaridae) merupakan salah satu parasitoid telur yang berpotensi untuk mengendalikan hama utama tanaman padi, wereng batang padi cokelat (Nilaparvata lugens [Hemiptera: Delphacidae]). Abamektin adalah salah satu insektisida yang terdaftar untuk pengendalian N. lugens. Penelitian ini bertujuan untuk mengetahui dampak aplikasi kontak abamektin terhadap suseptibilitas dan tingkat parasitasi A. nilaparvatae terhadap telur N. lugens pada kondisi laboratorium. Imago A. nilaparvatae serta instar satu dan imago N. lugens dipapar dengan residu abamektin di dalam tabung reaksi. A. nilaparvatae lebih peka terhadap abamektin dibandingkan N. lugens. Aplikasi abamektin pada konsentrasi anjuran (22,78 ppm) selama 30 menit menyebabkan mortalitas A. nilaparvatae 100%, dan mengurangi sampai dengan 85% pada konsentrasi yang lebih rendah 0,36 ppm. Sebaliknya, mortalitas instar satu N. lugens hanya sebesar 15% pada 22,78 ppm dan tidak menimbulkan kematian pada 0,36 ppm. Konsentrasi 22,78 ppm tidak menimbulkan kematian imago N. lugens. Selanjutnya, uji parasitasi dilakukan menggunakan media tanaman padi varietas IR-64 umur 38 hari setelah tanam. Tanaman diinfestasi dengan 50 ekor betina N. lugens selama dua hari. A. nilaparvatae dipapar abamektin dengan metode kontak pada konsentrasi 0.02, 0,23, dan 2,28 ppm. Parasitoid yang mampu bertahan hidup dilepaskan pada tanaman padi yang telah diinfestasi telur N. lugens. Aplikasi kontak abamektin mengurangi tingkat parasitasi A. nilaparvatae sebesar 86,34, 70.01, dan 28,43% pada konsentrasi 2,28; 0,23; dan 0,02 ppm. Selain itu, jumlah parasitoid yang muncul semakin menurun dengan peningkatan konsentrasi abamektin. Hasil ini menunjukkan bahwa abamektin dapat merugikan secara langsung terhadap mortalitas serta mengurangi tingkat parasitasi dan jumlah keturunan A. nilaparvatae.

scholarly journals Floral Resources for Trissolcus japonicus, a Parasitoid of Halyomorpha halys

Insects ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 413
Author(s):  
Hanna R. McIntosh ◽  
Victoria P. Skillman ◽  
Gracie Galindo ◽  
Jana C. Lee
Keyword(s):  
Egg Parasitoid ◽  
Flowering Plant ◽  
Floral Resources ◽  
Halyomorpha Halys ◽  
Floral Nectar ◽  
Crimson Clover ◽  
Classical Biocontrol ◽  
Nectar Sources ◽  
Trissolcus Japonicus ◽  
The Impact

The egg parasitoid Trissolcus japonicus is the main candidate for classical biocontrol of the invasive agricultural pest Halyomorpha halys. The efficacy of classical biocontrol depends on the parasitoid’s survival and conservation in the agroecosystem. Most parasitoid species rely on floral nectar as a food source, thus identifying nectar sources for T. japonicus is critical. We evaluated the impact of eight flowering plant species on T. japonicus survival in the lab by exposing unfed wasps to flowers inside vials. We also measured the wasps’ nutrient levels to confirm feeding and energy storage using anthrone and vanillin assays adapted for T. japonicus. Buckwheat, cilantro, and dill provided the best nectar sources for T. japonicus by improving median survival by 15, 3.5, and 17.5 days compared to water. These three nectar sources increased wasps’ sugar levels, and cilantro and dill also increased glycogen levels. Sweet alyssum, marigold, crimson clover, yellow mustard, and phacelia did not improve wasp survival or nutrient reserves. Further research is needed to determine if these flowers maintain their benefits in the field and whether they will increase the parasitism rate of H. halys.

Impact of Selected Insecticides Used in Eggplant Production on Edovum puttleri Grissell (Hymenoptera: Eulophidae)

1996 ◽  
Vol 31 (4) ◽  
pp. 432-439 ◽  
Author(s):  
George C. Hamilton ◽  
James H. Lashomb ◽  
Joseph M. Patt
Keyword(s):  
Leptinotarsa Decemlineata ◽  
Egg Parasitoid ◽  
Management Program ◽  
Edovum Puttleri ◽  
Egg Masses ◽  
Potato Beetle ◽  
Leptinotarsa Decemlineata Say ◽  
Contact Exposure ◽  
Leaf Residue ◽  
The Impact

The impact of insecticides currently used in commercial eggplant fields to control the Colorado potato beetle, Leptinotarsa decemlineata (Say), on the egg parasitoid Edovum puttleri Grissell was evaluated. Mortality from contact exposure to leaf residues and ingestion of contaminated honey, and parasitoid emergence from treated egg masses were compared for the following insecticides: esfenvalerate alone and in combination with piperonyl butoxide (PBO), oxamyl, PBO, and rotenone alone and in combination with PBO. Studies were conducted using concentrations of 1.0X, 0.75X, 0.5X, and 0.25X of the maximum labeled rate. Mortality was high and significantly different from controls for all chemicals and rates in both the leaf residue tests and feeding studies. Emergence of E. puttleri from treated egg masses also was significantly impacted by all materials and rates with the exception of PBO. The data suggest that the use of these materials in a pest management program that utilizes E. puttleri may reduce the survival of adults and emergence from eggs, thereby slowing parasitoid establishment.

Effects of imidacloprid on the orientation behavior and parasitizing capacity of Anagrus nilaparvatae, an egg parasitoid of Nilaparvata lugens

BioControl ◽  
2010 ◽  
Vol 55 (4) ◽  
pp. 473-483 ◽  
Author(s):  
Fang Liu ◽  
Shan W. Bao ◽  
Ying Song ◽  
Hai Y. Lu ◽  
Jian X. Xu
Keyword(s):  
Nilaparvata Lugens ◽  
Egg Parasitoid ◽  
Orientation Behavior

Influence of original host on chemotaxic behaviour and parasitism in Telenomus podisi Ashmead (Hymenoptera: Platygastridae)

2014 ◽  
Vol 104 (6) ◽  
pp. 781-787 ◽  
Author(s):  
R. Tognon ◽  
J. Sant'Ana ◽  
S.M. Jahnke
Keyword(s):  
Egg Parasitoid ◽  
Control Agent ◽  
Stink Bug ◽  
Natural Control ◽  
Field Bioassay ◽  
Original Host ◽  
Synthetic Sex Pheromone ◽  
Control Programmes ◽  
Telenomus Podisi ◽  
The Impact

AbstractThe egg parasitoid Telenomus podisi is a natural control agent of pentatomids, including Euschistus heros and Tibraca limbativentris, and success of parasitism is dependent upon the parasitoid finding the host. We tested the influence of host egg volatiles and the synthetic sex pheromone (zingiberenol) of T. limbativentris on chemotaxic behaviour of T. podisi, as well as, the impact of the original host on parasitoid selection. We used mated female T. podisi (48 h old) that emerged from the eggs of T. limbativentris or E. heros. The bioassays related to chemotaxy were performed in a Y-tube olfactometer and, to parasitism success, in laboratory and semi-field conditions. Telenomus podisi females that emerged from either the stink bug eggs, chose the pheromone more than control, or the pheromone plus eggs of E. heros in the semi-field bioassay, led to greater parasitism. Females that emerged from E. heros eggs chose egg volatiles from their original host rather than those from T. limbativentris, while females emerging from T. limbativentris, chose the egg volatiles of both hosts equally. When T. limbativentris was the original host, T. podisi females parasitized T. limbativentris over E. heros, while those emerging from E. heros exclusively parasitized E. heros eggs. These results demonstrated that T. podisi is more likely to parasitize the host in which it developed and that the original host can exert influence on the choice by those parasitoids. Understanding how the factors that mediate host–parasitoid communication are interrelated can help biological control programmes establish more effective and reliable tools with T. podisi.

SIMULATION MODEL FOR THE POPULATION DYNAMICS OF THE CARROT WEEVIL, LISTRONOTUS OREGONENSIS (LECONTE) (COLEOPTERA: CURCULIONIDAE)

1991 ◽  
Vol 123 (1) ◽  
pp. 63-76 ◽  
Author(s):  
D.X. Zhao ◽  
G. Boivin ◽  
R.K. Stewart
Keyword(s):  
Population Dynamics ◽  
Simulation Model ◽  
Mortality Rates ◽  
Egg Parasitoid ◽  
Adult Density ◽  
Larval Population ◽  
Listronotus Oregonensis ◽  
The Mean ◽  
Carrot Weevil ◽  
The Impact

AbstractA simulation model was developed for the population dynamics of a carrot weevil, Listronotus oregonensis (LeConte), population on muck-grown carrots. The model includes mortality rates of eggs, larvae, and pupae for different sowing dates of carrots. It also incorporates the overwintered adult density, the temperature-dependent growth rates of the above-mentioned life stages, the age-, temperature-, and phenology-dependent oviposition rates, and the impact of an egg parasitoid, Anaphes sordidatus (Girault), on egg mortality rates. Model output was evaluated by comparing simulated results with observed results on the seasonal totals and time of population peaks of the egg and larval populations. The mean percentage differences between the simulated and observed seasonal egg totals were 3.1 ± 0.66 (SE) in 1987 and 1988, and 4.2 ± 0.05 in 1989. They were not statistically different. The mean percentage differences between the simulated and observed seasonal larval totals were 10 ± 3.33 in 1987 and 1988 and 29.8 ± 0.66 in 1989. Independent data sets (i.e. field data in 1989) showed a significant increase in the simulation error of the larval population. Sensitivity analysis indicated that A. sordidatus had a large influence on the population dynamics of L. oregonensis.

scholarly journals Egg parasitoid exploitation of plant volatiles induced by single or concurrent attack of a zoophytophagous predator and an invasive phytophagous pest

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Letizia Martorana ◽  
Jacques Brodeur ◽  
Maria Cristina Foti ◽  
Alfonso Agrò ◽  
Stefano Colazza ◽  
...  
Keyword(s):  
Broad Bean ◽  
Feeding Activity ◽  
Egg Parasitoid ◽  
Plant Volatile ◽  
Bean Plants ◽  
Defence Signalling ◽  
Insect Predators ◽  
Telenomus Podisi ◽  
Defence Strategies ◽  
The Impact

AbstractZoophytophagous insect predators can induce physiological responses in plants by activating defence signalling pathways, but whether plants can respond to facultative phytophagy by recruiting natural enemies remains to be investigated. In Y-tube olfactometer bioassays, using a system including a Vicia faba plant, the zoophytophagous predator Podisus maculiventris and the egg parasitoid Telenomus podisi, we first demonstrated that T. podisi females are attracted by broad bean plants damaged by feeding activity of P. maculiventris and on which host egg masses had been laid, while they are not attracted by undamaged plants or plants damaged by feeding activity alone. In a second experiment, we evaluated the impact of the invasive phytophagous pest Halyomorpha halys on this plant volatile-mediated tritrophic communication. Results showed that the invasive herbivorous adults do not induce plants to recruit the native egg parasitoid, but they can disrupt the local infochemical network. In fact, T. podisi females are not attracted by volatiles emitted by plants damaged by H. halys feeding alone or combined with oviposition activity, nor are they attracted by plants concurrently infested by P. maculiventris and H. halys, indicating the specificity in the parasitoid response and the ability of the invasive herbivore in interrupting the semiochemical communication between plants and native egg parasitoids. To the best of our knowledge, this is the first study showing that zoophytophagous predator attacks induce indirect plant defences similarly to those defence strategies adopted by plants as a consequence of single or concurrent infestations of herbivorous insects.

Combinations of applications of a chitin synthesis inhibitor and inundative releases of egg parasitoids against the false codling moth, Cryptophlebia leucotreta (Meyrick) (Lepidoptera: Tortricidae), on citrus

1989 ◽  
Vol 79 (3) ◽  
pp. 507-519 ◽  
Author(s):  
Philip J. Newton
Keyword(s):  
Codling Moth ◽  
Significant Degree ◽  
Egg Parasitoid ◽  
Chitin Synthesis ◽  
Synthesis Inhibitor ◽  
Chitin Synthesis Inhibitor ◽  
False Codling Moth ◽  
The Impact ◽  
Cryptophlebia Leucotreta ◽  
Inundative Releases

AbstractA commercial trial of different strategies for suppressing damage by Cryptophlebia leucotreta (Meyrick) to citrus was made in the Transvaal lowveld, South Africa. Different regimes tested were applications of the chitin synthesis inhibitor teflubenzuron at 60 mg a.i./litre and ca 30 litres/tree, inundative releases of the egg parasitoid Trichogrammatoidea cryptophlebiae Nagaraja, and a combination of the two. One objective was to examine whether application of the insecticide earlier in the season than usually recommended would enhance the subsequent impact of parasitoids, native or released. It was found that parasitoid releases throughout the season (1.3 million/ha in total) produced the best overall reduction in damage by C. leucotreta. This was due largely to their better performance than that of any other strategy early in the season. Their impact in the later part of the season was not significantly different from that of release programmes which had begun at a later stage (0·6 million/ha). Very early applications of the teflubenzuron had no apparent impact on crop losses and did not enhance the impact of subsequent parasitoid releases to a significant degree. Teflubenzuron application at a recommended time later in the season was the most successful short-term approach, but its overall impact on crop loss was diminished by damage during the unprotected period before its application. A more appropriate management programme against C. leucotreta might therefore be to combine inundative releases of parasitoids early in the season with later applications of teflubenzuron if economic thresholds show they are required. The two approaches should not be concurrent since parasitoid activity was suppressed by the chitin synthesis inhibitor.

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