scholarly journals A Mark-Recapture Experiment for Male Adult Cabbage Webworm, Hellula undalis : Lepidoptera : Pyralidae

1990 ◽  
Vol 25 (1) ◽  
pp. 127-129 ◽  
Author(s):  
Yoichi SHIRAI ◽  
Kenji KAWAMOTO
Keyword(s):  
Male Adult ◽  
Mark Recapture ◽  
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 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

First detection of a microsporidium in the crucifer pest Hellula undalis (Lepidoptera: Pyralidae)—a possible control agent?

2003 ◽  
Vol 26 (2) ◽  
pp. 202-208 ◽  
Author(s):  
Inga Mewis ◽  
Regina G Kleespies ◽  
Christian Ulrichs ◽  
Wilfried H Schnitzler
Keyword(s):  
Control Agent ◽  
Hellula Undalis ◽  
Lepidoptera Pyralidae

scholarly journals Mating Disruption of Chilo suppressalis From Sex Pheromone of Another Pyralid Rice Pest Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

2020 ◽  
Vol 20 (3) ◽  
Author(s):  
Yu-yong Liang ◽  
Mei Luo ◽  
Xiao-gang Fu ◽  
Li-xia Zheng ◽  
Hong-yi Wei
Keyword(s):  
Sex Pheromone ◽  
Rice Paddy ◽  
Stem Borer ◽  
Cnaphalocrocis Medinalis ◽  
Chilo Suppressalis ◽  
Commercial Sex ◽  
Male Adult ◽  
Rice Stem Borer ◽  
Lepidoptera Pyralidae ◽  
Potential Inhibitors

Abstract The rice stem borer, Chilo suppressalis (Walker), and the rice leaf folder, Cnaphalocrocis medinalis Guenée, are two of the most destructive lepidopteran pests in rice. Since these two pyralid insects overlap in their occurrence in rice paddy fields, farmers prefer to set their pheromone-baited traps together in the rice fields for their monitoring. However, our field observation demonstrated that no male adult of C. suppressalis was captured in traps baited with commercial sex pheromone of C. suppressalis (CCS) combined with commercial sex pheromone of C. medinalis (CCM). To confirm that the C. medinalis sex pheromone component(s) interfere with the attraction of males of the rice stem borers to their conspecific females, single components of C. medinalis sex pheromone combined with CCS in traps were tested in the laboratory and rice paddy field. The results revealed that the two alcohol components in CCM, i.e., (Z)-11-octadecen-1-ol (Z11-18: OH) and (Z)-13-octadecen-1-ol (Z13-18: OH) may cause a significant reduction in capturing C. suppressalis males caused by CCS. We recommend against using these sex pheromones together in the field and suggest that Z11-18: OH and Z13-18: OH could be potential inhibitors or antagonists of C. suppressalis sex pheromone to control the rice stem borer.

Potential Use of Trichogramma pintoi as a Biocontrol Agent Against Heortia vitessoides (Lepidoptera: Pyralidae)

2019 ◽  
Vol 113 (2) ◽  
pp. 654-659
Author(s):  
Zhen Yan ◽  
Jian-Jun Yue ◽  
Chun-Yong Yang
Keyword(s):  
Functional Response ◽  
Biological Control Agent ◽  
Natural Populations ◽  
Reproductive Potential ◽  
Adult Life ◽  
Control Agent ◽  
Average Lifetime ◽  
Male Adult ◽  
Potential Capacity ◽  
Lepidoptera Pyralidae

Abstract Heortia vitessoides Moore is the most serious insect defoliator of Aquilaria sinensis (Lour.) Gilg, an endangered and economically important plant that produces highly prized agarwood. Samples from recently identified indigenous natural populations of Trichogramma pintoi Voegele were collected from H. vitessoides eggs in A. sinensis forests in Yunnan Province, China. To assess the potential capacity of this parasitoid for use as a biological control agent, its functional response, female reproductive potential, and male insemination capacity were investigated in this study. Females successfully parasitized 1- to 4-d-old eggs of H. vitessoides but failed to parasitize 5- to 8-d-old eggs. The parasitoid exhibited a Holling type II functional response, and the estimated maximum numbers of 1- to 4-d-old H. vitessoides eggs parasitized by a single T. pintoi female were 38.1, 29.8, 26.0, and 22.2 eggs over a 24-h period, respectively. Additionally, the parasitoid’s average lifetime fecundity was 89.8 ± 2.5 eggs, of which 66.26% were laid within the first 2 d. The average number of total females that mated with a male in his lifetime (4.70 ± 0.13 d) was 10.4, and the average number of total daughters of a male was 292.1. On day 1 of male adult life, the greatest number of females were inseminated by males, and the most daughters were produced; however, the number of copulations and insemination ability decreased rapidly with male age. These results suggest that T. pintoi is a promising candidate for inundative release against H. vitessoides in China, and these findings will guide efforts in achieving mass production of this parasitoid.

Sign in / Sign up

Export Citation Format

Share Document