Estudios biológicos de Trichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae), parasitoide de huevos de Tuta absoluta Meyrick (Lepidoptera: Gelechiidae)

Virgala, María Begoña Riquelme; Botto, Eduardo N.

doi:10.1590/s1519-566x2010000400023

Cited by 18 publications

(9 citation statements)

References 17 publications

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“…The longevity of T. bactrae varied from 1-15 days with mean longevity of 7.9±0.37 days, when fed on 50 % bees honey. Longevity was 6.2 on T. absoluta and 6.1 d on S. cerealla (Virgala and Botto, 2010). Longevity of T. bactrae is comparatively shorter than in other egg parasitoid species.…”

Section: Assessment Of the Longevity Of T Bactraementioning

confidence: 79%

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Trichogrammatoidea bactrae (Hymenoptera: Trichogrammatidae): a potential biocontrol agent of rice leaf folder

2015

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Rice leaf folder, Cnaphalocrocis medinalis is a major pest, in many rice growing areas of Sri Lanka. Biological control of this pest is encouraged due to ill effects of insecticide application on rice ecosystem. Use of egg parasitoids is advantageous over larval and pupal parasitoids, as they could destroy pests at the egg stage. Trichogrammatoidea bactrae present in rice fields in Sri Lanka, is an egg parasitoid of rice leaf folder. This study was conducted to assess the potential of T. bactrae as a biocontrol agent for the management of rice leaf folder. T. bactrae was reared on Cocyra cephalonica and its fecundity, longevity and parasitism were assessed. Acceptance of stored host eggs and parasitoid emergence from stored parasitized eggs were examined. Dispersal ability of parasitoid was also examined. T. bactrae adults showed a mean longevity of 7.9 days (range 1-15 days) and laid 55 eggs / female during first 5 days; of which, 56 % of eggs was laid on the first day. There was a significant reduction (F=5.26; df=14; 89; P< 0.001) in parasitism, 66-35 %, with increasing number of generations on C. cephalonica. Parasitism steadily decreased as the number of generations increased. Acceptance of C. cephalonica eggs varied significantly with temperature (F=187 df=1; 126 P<0.001). Mean acceptance at 4 and 8 ºC was 30 and 42 % respectively. Acceptance also significantly varied with the duration stored (F=385; df=6; 126; P<0.001). Parasitized eggs of T. bactrae could be successfully stored under low temperature (4 ºC) up to 40 d. Over 80 % parasitism was achieved with 150 parasitoids released within 25 cm radius circle. Hence, T. bactrae is a promising candidate to be promoted as a biocontrol agent of C. medinalis.

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Section: Assessment Of the Longevity Of T Bactraementioning

confidence: 79%

“…Fecundity of T. bactrae could change with the type of host eggs. Fecundity of T. bactrae was 48.9 eggs/female when T. absoluta was used and 39 when S. cereallela was used as the host (Virgala and Botto, 2010). T. bactrae shows lower fecundity compared with other trichogrammatid egg parasitoid species.…”

Section: Assessment Of the Fecundity Of T Bactraementioning

confidence: 88%

Trichogrammatoidea bactrae (Hymenoptera: Trichogrammatidae): a potential biocontrol agent of rice leaf folder

2015

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“…bactrae on an invasive pest, T. absoulta in an open tomato fields. These species are mainly used in biological control of T. absoluta in the South American and European countries (Cabello et al, 2009;Virgala and Botto, 2010). The emergence of T. achaeae and Tr.…”

Section: Resultsmentioning

confidence: 99%

Natural parasitism by trichogrammatids (Hymenoptera: Trichogrammatidae) on lepidopteran eggs under diverse cropping system

Navik

Jalali

Lalitha

2019

Journal of Biological Control

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The present study was conducted to collect and identify the species of trichogrammatids from eggs of lepidopteran pests infesting the diverse cropping systems in the country. A total of 28 plant species were inspected for the collection of lepidopteran eggs either through collection of insect eggs or by placing sentinel egg cards. The species such as Trichogramma chilonis Ishii, T. achaeae Nagaraja and Nagarkatti, T. danausicida Nagaraja, Trichogrammatoidea bactrae Nagaraja and Tr. armigera Manjunath were recorded naturally occurring with 12 species of lepidopteran insect pests. In nature, the parasitism rate varied from 5.35 to 82.25% by the associated trichogrammatids. A total of 596 sentinel trap cards were placed in the agricultural, vegetables, fruits crops, and grasses on the bunds of fields to trap the egg parasitoids present in the different habitat. Through sentinel cards, three species, viz., T. chilonis, T. achaeae and Tr. bactrae were found inhabit the vegetables and ornamental crops. The percentage of adult emergence from the sentinel trap cards ranged from 70.59 to 100.0%. Natural parasitism of Tr. bactrae recorded for the first time on the eggs of Lampides boeticus L. infesting wild species of Crotalaria. In addition, the natural parasitism of Tr. armigera and Tr. bactrae on the eggs of L. boeticus laid on either cultivated or wild relatives of Crotalaria in undisturbed habitat had higher natural parasitism due to their bright yellow flower attracts parasitoids to parasitize the eggs and conserve these egg parasitoids. Recently, natural parasitism of Trichogramma sp. was recorded on invasive fall armyworm, Spodoptera frugiperda (J.E. Smith) infesting maize in Karnataka. Based on the present work, there could be choice of selecting right species which occur naturally on individual crops.

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“…A recent paper 44 showed that the predation rates of nymphs and adults of the damsel bug Nabis pseudoferus Remane (Hemiptera: Nabidae) are similar to those of mirid predators, but the paper contained insufficient information to be able to calculate the pest kill rate. 50 , an exotic species initially introduced into Argentina for control of Pectinophora gossypiella Saunders (Lepidoptera: Gelechiidae) 45,50 . In South America, most studies on larval parasitoids of T. absoluta concern D. phthorimaea, Dolichogenidea (Apanteles) gelechiidivoris Marsh.…”

Section: Methodsmentioning

confidence: 99%

The pest kill rate of thirteen natural enemies as aggregate evaluation criterion of their biological control potential of Tuta absoluta

Lenteren

Lanzoni

Hemerik

et al. 2021

Sci Rep

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Ecologists study how populations are regulated, while scientists studying biological pest control apply population regulation processes to reduce numbers of harmful organisms: an organism (a natural enemy) is used to reduce the population density of another organism (a pest). Finding an effective biological control agent among the tens to hundreds of natural enemies of a pest is a daunting task. Evaluation criteria help in a first selection to remove clearly ineffective or risky species from the list of candidates. Next, we propose to use an aggregate evaluation criterion, the pest kill rate, to compare the pest population reduction capacity of species not eliminated during the first selection. The pest kill rate is the average daily lifetime killing of the pest by the natural enemy under consideration. Pest kill rates of six species of predators and seven species of parasitoids of Tuta absoluta were calculated and compared. Several natural enemies had pest kill rates that were too low to be able to theoretically reduce the pest population below crop damaging densities. Other species showed a high pest reduction capacity and their potential for practical application can now be tested under commercial crop production conditions.

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Estudios biológicos de Trichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae), parasitoide de huevos de Tuta absoluta Meyrick (Lepidoptera: Gelechiidae)

Cited by 18 publications

References 17 publications

Trichogrammatoidea bactrae (Hymenoptera: Trichogrammatidae): a potential biocontrol agent of rice leaf folder

Trichogrammatoidea bactrae (Hymenoptera: Trichogrammatidae): a potential biocontrol agent of rice leaf folder

Natural parasitism by trichogrammatids (Hymenoptera: Trichogrammatidae) on lepidopteran eggs under diverse cropping system

The pest kill rate of thirteen natural enemies as aggregate evaluation criterion of their biological control potential of Tuta absoluta

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