scholarly journals Spigelia longiflora (Mart. et. Gal.): actividad antialimentaria en tres especies de insectos fitófagos

2017 ◽  
pp. 135
Author(s):  
Miguel Ángel Villavicencio ◽  
Blanca E. Pérez-Escandón
Keyword(s):  
Spodoptera Frugiperda ◽  
Feeding Activity ◽  
Insect Species ◽  
Epilachna Varivestis ◽  
Pseudaletia Unipuncta

Insecto feeding activity of a fraction obtained from the leaves of Spigelia longiflora (Loganiaceae) was tested on the larvae of Pseudaletia unipuncta, Spodoptera frugiperda (Lepidoptera) and Epilachna varivestis (Coleoptera). All the three insect species refused to eat diets treated with the obtained fraction

scholarly journals Effectiveness of Entomopathogenic Fungi on Immature Stages and Feeding Performance of Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) Larvae

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1044
Author(s):  
Atif Idrees ◽  
Ziyad Abdul Qadir ◽  
Komivi Senyo Akutse ◽  
Ayesha Afzal ◽  
Mubasher Hussain ◽  
...  
Keyword(s):  
Spodoptera Frugiperda ◽  
Feeding Activity ◽  
Fall Armyworm ◽  
Post Treatment ◽  
Larval Feeding ◽  
Feeding Performance ◽  
Fungal Isolates ◽  
Aspergillus Sp ◽  
Staple Crop ◽  
Neonate Larvae

Maize is a major staple crop in China, and the sustainable productivity of this primary crop has been recently threatened by fall armyworm (FAW), Spodoptera frugiperda, invasion. The five fungal isolates, Aspergillus sp. BM-3 and SE-2-1, Cladosporium tenuissimum SE-10, Penicillium citrinum CTD-24, and Beauveria bassiana ZK-5 were assessed for their efficacy in causing mortality against first to sixth instar eggs and neonate larvae seven days post-treatment, and their effects on the feeding performance of sixth instar S. frugiperda larvae at 48 h post-treatment at three concentrations (1 × 106, 1 × 107, and 1 × 108 conidia mL−1) were also assessed. The six instar S. frugiperda larvae were not susceptible to the five tested fungal isolates. However, B. bassiana ZK-5 caused the highest egg mortality of 40, 70, and 85.6% at 1 × 106, 1 × 107, and 1 × 108 conidia mL−1, respectively, followed by P. citrinum CTD-24 (30.6, 50, and 75.6%) and C. tenuissimum SE-10 (25.6, 40, and 55.6%). In addition, B. bassiana ZK-5 caused the highest neonate mortality of 54.3% at 1 × 108 conidia mL−1. B. bassiana ZK-5 and P. citrinum CTD-24 caused cumulative mortality, including 93.3 and 83.3% mortality of eggs and neonates, respectively, at 1 × 108 conidia mL−1. Furthermore, B. bassiana ZK-5 reduced the feeding efficacy of first to third instar S. frugiperda larvae by 66.7 to 78.6%, while P. citrinum CTD-24 and C. tenuissimum SE-10 reduced larval feeding by 48.3 to 57.1% at 1 × 108 conidia mL−1. However, these fungal isolates were less potent in reducing the feeding activity of fourth to sixth instar S. frugiperda larvae (>46% with B. bassiana at 48 h post-treatment). The tested fungal isolates could play an essential role as microbial biopesticides in suppressing the S. frugiperda population in China after further investigations on their efficacy are obtained in the field.

The antifeedant effect of some new withanolides on three insect species,spodoptera littoralis, epilachna varivestis andtribolium castaneum

1987 ◽  
Vol 15 (1) ◽  
pp. 15-29 ◽  
Author(s):  
K. R. S. Ascher ◽  
Miriam Eliyahu ◽  
E. Glotter ◽  
A. Goldman ◽  
I. Kirson ◽  
...  
Keyword(s):  
Spodoptera Littoralis ◽  
Insect Species ◽  
Epilachna Varivestis ◽  
Antifeedant Effect

scholarly journals Uji Efektivitas Metabolit Sekunder Jamur Simplicillium sp. terhadap Spodoptera frugiperda J.E. Smith di Laboratorium

2021 ◽  
Vol 2 ◽  
pp. 160-164
Author(s):  
Nurtiati Nurtiati ◽  
Endang Warih Minarni ◽  
Puty Andini
Keyword(s):  
Secondary Metabolites ◽  
Secondary Metabolite ◽  
Spodoptera Frugiperda ◽  
Plant Protection ◽  
Feeding Activity ◽  
Larval Growth ◽  
Growth Time ◽  
Larval Feeding ◽  
Immersion Method ◽  
Spraying Method

This research aims to determine the effect of the secondary metabolites of the fungi Simplicillium sp. on mortality, larval feeding capacity, larval growth, percentage of pupae and imagos, fecundity and fertility, secondary metabolites of the fungi Simplicillium sp. which effectively kills Spodoptera frugiperda. This research was conducted in the Plant Protection Laboratory of Agriculture Faculty, Jenderal Soedirman University, Purwokerto from October 2020 until January 2021. The method used in this research was a factorial randomized block (RBD) with two factors. The first factor is the concentration of secondary metabolite of the fungi Simplicillium sp. consisting of control (K0), 10% concentration (K1), 20% concentration (K2), 30% concentration (K3); and a synthetic insecticide with an active ingredient Emmamectin benzoate and Lufenuron 1 ml/l (K4). The second factor is the application method which consists of the spraying method on the larvae (A1) and the feed immersion method (A2). The observed parameters were mortality, feeding capacity, growth time, percentage of pupae and imagos formed, fecundity and fertility, and effective concentration. The result showed that: 1) secondary metabolite of the fungi Simplicillium sp. with a concentration of 20 percent larvae spraying method caused larvae mortality by 36.67 percent and the food immersion method caused larvae mortality by 45.00 percent, and decreased feeding activity by 26.12 percent; 2) secondary metabolite of the fungi Simplicillium with a concentration of 20 percent was able to inhibit the growth of larvae by 3.83 percent, pupae by 5,40 percent and imagos by 14.19 percent, reduced the number of pupae and imagos formed by 49.17 percent and 37.33 percent, and reduced fertility at a concentration of 10 percent by 11.30 percent; 3) secondary metabolite of the fungi Simplicillium sp. has not been effectively used as a control for S. frugiperda since it has an efficacy value of less than 80 percent.

scholarly journals Host-seeking behavior of the Heterorhabditis amazonensis nematode in response to stimulant sources1

2017 ◽  
Vol 47 (3) ◽  
pp. 265-272
Author(s):  
Vanessa Andaló ◽  
Grazielle Furtado Moreira ◽  
Alcides Moino Junior
Keyword(s):  
Root Exudates ◽  
Spodoptera Frugiperda ◽  
Entomopathogenic Nematodes ◽  
Feeding Activity ◽  
Chemical Compounds ◽  
Volatile Chemicals ◽  
Tomato Seedlings ◽  
Host Seeking ◽  
Seeking Behavior ◽  
Volatile Chemical Compounds

ABSTRACT Several species of entomopathogenic nematodes have different host-seeking methods, and could be considered as "ambusher" or "cruiser". These differences may depend on how the nematodes detect the volatile signals used as cues for foraging. This study aimed to evaluate the locomotor response of Heterorhabditis amazonensis RSC5 to the compounds from root exudates of different plants, as well as to stimulants produced by the presence of insects or to the feeding activity of insects on plants. Arenas with agar-water substrates, containing root exudates from corn, bean, soybean, cucumber, garlic and tomato seedlings, were assembled to determine the substrates possibly preferred by H. amazonensis.Arenas with sand were also constructed to include, besides the seedling root exudates, treatments containing Spodoptera frugiperda, garlic seedlings and S. frugiperda feeding on garlic seedlings. The H. amazonensis species was attracted to the volatile chemicals emitted by all the root exudates tested, especially the exudate from garlic seedlings. However, it showed the greatest attraction to the combination of garlic seedlings and S. frugiperda, indicating that the search of H. amazonensis for its host is enhanced by the association between the insect and the volatile chemical compounds produced by plants, when attacked by insects.

RUBIDIUM AS A MARKER FOR MEXICAN BEAN BEETLES, EPILACHNA VARIVESTIS (COLEOPTERA: COCCINELLIDAE)

1976 ◽  
Vol 108 (4) ◽  
pp. 337-339 ◽  
Author(s):  
Merle Shepard ◽  
V. H. Waddill
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Chloride Solution ◽  
Feeding Activity ◽  
Epilachna Varivestis ◽  
Rubidium Chloride ◽  
Bean Plants ◽  
Normal Feeding

AbstractMexican bean beetles, Epilachna varivestis Mulsant, were marked with rubidium by allowing larvae and adults to feed on foliage of bean plants treated with a rubidium chloride solution. Detection of rubidium was effected by atomic absorption spectroscopy. Adults which had fed for 4 days on rubidium-chloride-treated plants then transferred to untreated plants contained elevated levels of rubidium up to 34 days. The presence of rubidium was not detectable in the progeny of treated beetles at levels significantly different from controls. Consumption of rubidium-chloride-treated foliage produced no observable detrimental effects on the beetles. The technique allowed them to acquire a relatively permanent label through their normal feeding activity.

Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

1978 ◽  
Vol 36 (2) ◽  
pp. 378-379
Author(s):  
J. R. Adams ◽  
G. J Tompkins ◽  
A. M. Heimpel ◽  
E. Dougherty
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Developmental Stages ◽  
Management Program ◽  
Acheta Domesticus ◽  
Epilachna Varivestis ◽  
House Cricket ◽  
Similar Morphology ◽  
Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

Partial characterization and post-feeding activity of midgut aminopeptidase in the human body louse,Pediculus humanus humanus

1998 ◽  
Vol 23 (4) ◽  
pp. 382-387 ◽  
Author(s):  
James O. Ochanda ◽  
Eva A. C. Oduor ◽  
Rachel Galun ◽  
Mabel O. Imbuga ◽  
Kosta Y. Mumcuoglu
Keyword(s):  
Human Body ◽  
Feeding Activity ◽  
Partial Characterization ◽  
Body Louse ◽  
Pediculus Humanus ◽  
Post Feeding ◽  
Human Body Louse
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