A host egg aged between 0 and 24 h were more receptive to parasitization (89-90.1% parasitized) than a host egg aged between 36 and 48 h old (77.8% until 79.3% parasitized).
The first day was given over to the treatment of UI-4 eggs, the 2nd day to prepare for the treatment of UI-3, the 3rd day to prepare for the treatment of UI-2, the 4th day to prepare for the treatment of UI-1 and the 5th day to prepare for the treatment of UI-0. Male and female adult moths were captured using glass tubes, sized center-line (Ø) at 1.5 cm and with a length of 9 cm. A higher dose of parasitoids tended to result in a higher parasitization intensity, although the Tukey test α = 0.05 between Si-2500 and Si-5000 and therefore the two do not show a significant difference (p<0.05). : nombre d analyses. Trichogramma japonicum Taxonomic Tree; Domain: Eukaryota Kingdom: Metazoa Phylum: Arthropoda Subphylum: Uniramia Class: Insecta; Natural enemy of; Mythimna unipuncta; Naranga diffusa; Ostrinia nubilalis; Scirpophaga incertulas; Scirpophaga innotata If a host egg was always available for the T. japonicum parasitoid, its age would only ever be short: In this experiment, it reached a maximum of 1.9 days. The first factor consisted of five different life stages of parasitoids (UP), delineated from 0 up to 4 days (UP-0, UP-1, UP-2, UP-3 and UP-4). According to Carpenter et al.34, the effect of the host age difference between 1 until 3 days on the parasitization ability of Trichogrammatoidea cryptophlebiae (Hymenoptera:Trichogrammatidae) was not significantly different under conditions in which it could not choose the host egg age (in this case, the eggs of Cydia pomonella, (Lepidoptera: Tortricidae).
As females are all relatively similar, taxonomists rely upon examination of males to tell the different species apart, using features of their antennae and genitalia. The parasitoid release in a dosage of 250,000 parasitoids ha1 was more effective in reducing the population of S. incertulas in the field and successfully increased the intensity of parasitization by an average of 9.10 eggs parasitized/egg-mass (9.10/3.85 = 236% compared to control).
Background and Objective: One of the Trichogramma species commonly used to control rice stem borer is Trichogramma japonicum (T. japonicum). Pests of crops in Indonesia (revised). The opposite phenomenon occurs when the host eggs are abundant in the field and T. japonicum was absent. Multiplication of Trichogramma japonicum: The parasitoid T. japonicum used for later release were obtained from a collection of S. incertulas eggs that had developed at the research location.
This research was conducted in Karangdowo Sub-regency in Klaten Regency. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. This research aimed to know ability of parasitization, the pattern of dispersal and the effect of the release of T. japonicum against the intensity of parasitization. Observations were made every day, parasitoids that appeared were then cultivated using a host egg substitute (C. cephalonica) glued onto a card. Biological control of insect pests by insect parasitoids and predators: the BIOCAT database. According to Fleury and Bouletreau23, Trichogramma brassicaes parasitization ability aged 4 days old decreased from an average of 81.2 when younger to 34 eggs/parent.
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