Natural enemies for the cabbage webworm,Hellula undalis (Fabr.) (Lepidoptera: Pyralidae) in Malaysia

1997 ◽  
Vol 39 (1) ◽  
pp. 3-10 ◽  
Author(s):  
A. Sivapragasam ◽  
T. H. Chua
Keyword(s):  
Natural Enemies ◽  
Hellula Undalis ◽  
Lepidoptera Pyralidae

scholarly journals Effet des extraits aqueux de Calotropis procera sur les principaux ravageurs du chou en culture au Sénégal

2020 ◽  
Vol 14 (5) ◽  
pp. 1600-1610
Author(s):  
Saliou Ngom ◽  
Toffène Diome ◽  
Bocar Diop ◽  
Mbacké Sembene
Keyword(s):  
Plutella Xylostella ◽  
Spodoptera Littoralis ◽  
Calotropis Procera ◽  
P Value ◽  
Aqueous Extracts ◽  
Hellula Undalis ◽  
Lepidoptera Pyralidae ◽  
Extraits Aqueux ◽  
Cabbage Pests ◽  
Lepidoptera Noctuidae

Au Sénégal, le chou est l’un des légumes les plus cultivés et consommés, de par son cycle relativement court (60-90 jours après repiquage) et sa possibilité d’être cultivé toute l’année. Cependant il est attaqué par plusieurs ravageurs tels que Plutella xylostella (L.) (Lepidoptera, Plutellidae), Hellula undalis (F.) (Lepidoptera, Pyralidae) et Spodoptera littoralis (B.) (Lepidoptera, Noctuidae). L’objectif de cette étude était de contribuer à la lutte contre ces ravageurs du chou en culture dans la zone des Niayes en utilisant les extraits aqueux à base de feuilles de Calotropis procera (Apocynaceae). L’étude a été menée sur 28 parcelles élémentaires dans la zone des Niayes (durant la période du 3 janvier au 22 mars 2019). Les formulations d’extrait de feuilles de C. procera utilisant comme solvant l’eau de robinet et l’eau de puits (ER et EP), appliquées à des temps différents le matin (ERM, EPM) et le soir (ERS, EPS) ont montré leurs efficacités sur les larves de P. xylostella et H. undalis. Par contre, les extraits ne sont pas efficaces sur S. littoralis (P-value= 0,672). En plus de leurs effets biocides, les extraits à base de feuilles de C. procera semblent accélérer la croissance des plants de chou. La nature du solvant et la période du traitement n’ont pas montré une différence significative.Mots clés : Biocide, Brassicassée, Niayes, lutte biologique English title: Aqueous extracts effect of Calotropis procera on the principal cabbage pests in culture in Senegal In Senegal, the cabbage is one of the most cultivated and consumed vegetables, from its relatively short cycle (60-90 days after road repair) and the possibility of being cultivated all the year. However it is attacked by several pests such as Plutella xylostella (L.) (Lepidoptera, Plutellidae), Hellula undalis (F.) (Lepidoptera, Pyralidae) and Spodoptera littoralis (B.) (Lepidoptera, Noctuidae). The objective of this study was to contribute on protect against cabbage pests in culture in the zone of Niayes by using the aqueous extracts containing sheets of Calotropis procera (Apocynaceae). The study was undertaken on 28 elementary pieces to in the zone of Niayes (during the period of January 3 at March 22, 2019). The formulations of extract using as solvent the water of tap and the water of well (ER and EP), applied to different times morning (ERM, EPM) and evening (ERS, EPS) showed their effectiveness on larvae of P. xylostella and H. undalis. On the other part S. littoralis was resistant to treatment (P=0,672) confirms it. In addition to their biocides effects, the extracts containing sheets of C procera seem accelerated the cabbage patches growth. The nature of solvent and the treatment period did not show a significant difference.Keywords: Biocide, Brassicasseae, Niayes, biological control

scholarly journals Efficacy of Trichogrammatidae Species (Hymenoptera) Submitted to the Herbicide Glyphosate

2019 ◽  
Vol 37 ◽  
Author(s):  
G.L.D. LEITE ◽  
P.D. PAULO ◽  
L.D. TUFFI-SANTOS ◽  
A.C. ALVARENGA ◽  
M.A. SOARES ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Natural Enemies ◽  
Test Tube ◽  
Control Treatment ◽  
Distilled Water ◽  
Anagasta Kuehniella ◽  
Lepidoptera Pyralidae ◽  
Herbicide Glyphosate

ABSTRACT: Information on selective herbicide, including glyphosate that does not affect non-target organisms such as natural enemies, are important in integrated pest management programs in maize. The dose 13.94 L ha-1 of glyphosate was evaluated in females on 10 Trichogrammatidae species. A female of each Trichogrammatidae species was individually positioned per test tube with a card containing approximately 45 Anagasta kuehniella Zeller, 1879 (Lepidoptera: Pyralidae) eggs. For 48 h parasitism was allowed, and later the cartons were sprayed with the herbicide or with distilled water, for the control treatment. The glyphosate showed variable effects for parasitoids. The emergence of T. acacioi females was lower but that of T. atopovilia, T. demoraesi, and T. pretiosum higher with the glyphosate. The sex ratio of T. galloi was lower and that of T. bruni, T. brasiliensis, T. demoraesi, and T. soaresi higher with glyphosate. This glyphosate was innocuous to all Trichogrammatidae species females based on the classification adopted internationally.

scholarly journals A sex attractant of the cabbage webworm, Hellula undalis Fabricius (Lepidoptera: Pyralidae).

2003 ◽  
Vol 38 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Hajime Sugie ◽  
Junya Yase ◽  
Kiyotomo Futai ◽  
Yoichi Shirai
Keyword(s):  
Sex Attractant ◽  
Hellula Undalis ◽  
Lepidoptera Pyralidae

Natural enemies associated with rice stemborers in the Kou Valley, Burkina Faso

2015 ◽  
Vol 35 (04) ◽  
pp. 164-171 ◽  
Author(s):  
Minyèmba Souobou ◽  
Souleymane Nacro ◽  
Delphine Ouattara
Keyword(s):  
Burkina Faso ◽  
Natural Enemies ◽  
Animal Health ◽  
Good Alternative ◽  
Predator Species ◽  
Average Percentage ◽  
Cropping Season ◽  
Lepidoptera Pyralidae ◽  
Sustainable System ◽  
Lepidoptera Noctuidae

Stemborers are a major constraint to the production of rice in the Kou Valley, Burkina Faso. Biological control is a good alternative to the use of agrochemicals that are harmful to human and animal health, and the environment. A survey of natural enemies of stemborers was conducted during the 2014 rice-cropping season across three transplanting periods (P1, P2 and P3). Plant and insect samples were collected by mowing and trapping at weekly intervals until harvest, starting 21 days after transplanting, and examined microscopically. Immature stages of the parasitized stemborers were reared to maturity for a positive identification of the parasitoids. Three genera of stemborers were identified:Chilo(Lepidoptera: Pyralidae),Maliarpha(Lepidoptera: Pyralidae) andSesamia(Lepidoptera: Noctuidae). TheChilogenus was the most important with an average percentage of 41.4% of the pre-imaginal population in P2 followed byMarliarpha(1.1%) andSesamia(0%). A total of 15 hymenopteran parasitoid species that included nine genera and seven families were identified. All the parasitoids were associated withChiloand only two of the species parasitizedMaliarpha. The most frequent parasitoids encountered wereBracon testacerofatus,Goniozus indicus,Dolichogenidea oryzaeandBraconspp. A total of 28 predator species were recorded from 22 genera, 6 orders and 15 families.Leucaugesp.,Agriocnemissp.,Lycosa pseudoannulataandLycosasp. were the most important predators with frequencies reaching 15% of the arthropods caught in some fields. These results will be employed to develop a sustainable system to manage rice stemborers.

Sign in / Sign up

Export Citation Format

Share Document