Studies on the legume pod-borer, Maruca testulalis (Geyer)—I: Life cycle and behaviour

Okeyo-Owuor, J. B.; Ochieng, R. S.

doi:10.1017/s1742758400000503

Cited by 10 publications

(13 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At Tamil Nadu, India, the larvae periods for the 1st-5th instars were 13.9, 13.3 and 12.9 days at 24-27°C when larvae were reared on flowers and flower buds of cowpea, pigeonpea and hyacinth bean, respectively (Ramasubramanian and Sundara Babu, 1988). At Mbita, Kenya, the developmental period for the same stage, reared on potted cowpea at 25-30°C ranged from 8-14 days (Okeyo-Owuor and Ochieng, 1981). In the present experiments, the total periods from the 1st-5th instars at 24.3 and 29.3°C were 14.3 and 12.1 days, respectively (Table 1).…”

Section: Discussionmentioning

confidence: 49%

“…The life cycle and development of M. vitrata has been studied extensively in both the field and laboratory (e.g. Okeyo-Owuor and Ochieng, 1981;Ke et al, 1985;Atachi and Gnanvossou, 1989;Chang and Chen, 1989;Oghiakhe and Odulaja, 1993). Although Jackai and Inang (1992) reported the development of the third instar larvae and the pupae reared on pods of Vigna varieties at various temperatures, no such experiment precise enough to determine the thermal constant and thresholds for the development of M. vitrata has been conducted either in the laboratory or the field.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of temperature on development and survival of the legume pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Pyralidae) reared on a semi-synthetic diet

Adati

Nakamura

Tamò³

et al. 2004

Appl. Entomol. Zool.

View full text Add to dashboard Cite

The effect of temperature on the development and survival of the legume pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Pyralidae) was examined by rearing cohorts on a semi-synthetic diet containing cowpea grain and leaf at different constant temperatures in the laboratory. The developmental periods for eggs, larvae and pupae shortened with increasing temperatures from 14.4°C to 29.3°C. The thermal constants and lower thermal thresholds for the development in the egg, larval and pupal stages were 51.1, 234.7 and 116.5 degree-days and 10.5, 10.0 and 10.9°C, respectively. Development was delayed at higher temperatures for all the stages, and the upper thermal threshold was estimated to be in the range of 29.3-31.9°C depending on the developmental stage. At 34.3°C, the survival rates for eggs, larvae and pupae were below 10%, which were lower than those at other temperatures. The development of the larval population in the cowpea field of northern Nigeria was simulated based on daily temperature and the developmental data obtained from the laboratory experiments. The simulated dates of the midpoints in the 4th and 5th instars were concordant with the dates of 50% cumulative field collection for the respective instars. These results would be useful for forecasting pest incidence in the crop fields of the West African savanna.

show abstract

Section: Discussionmentioning

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Effect of temperature on development and survival of the legume pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Pyralidae) reared on a semi-synthetic diet

Adati

Nakamura

Tamò³

et al. 2004

Appl. Entomol. Zool.

View full text Add to dashboard Cite

show abstract

“…For instance, the eggs were laid on leaf surfaces and were usually unprotected (Okeyo-Owuor and Ochieng', 1981). The total real generation mortality ranged between 98.4-98.6% at site 1 and 98.7-99.4% at site 2, showing that, from the initial cohorts of eggs less than 2%, M. testulalis survived to the adult stage under field conditions.…”

Section: Discussionmentioning

confidence: 99%

Life tables, key factor analysis and density relations in natural populations of the legume pod borer Maruca testulalis Geyer (Lepidoptera: Pyralidae) in Western Kenya

Okeyo-Owuor

Oloo

1991

Int. J. Trop. Insect Sci.

Self Cite

View full text Add to dashboard Cite

Data from regular field samples throughout the life cycle for five generations of the legume pod borer, Maruca testulalis on cowpea crops at one site, and three generations at another, were used to construct life tables and through key factor analysis to determine the key mortality factor. The total mortality from egg to adult was 98.4-98.6% at site 1 and 98.2-99.4% at site 2. At both sites the highest mortality occurred between the eggs and the third instar larvae, whilst the fourth instar larvae suffered the lowest mortality. The commonest cause of mortality was classified as disappearance, followed by disease. Parasitism contributed minimally to M. testulalis mortality. At site 1 disappearance at the egg stage was the key mortality factor and was significantly correlated with the total generation mortality. At site 2, disappearance operating at the larva 1 and 2 stage was tentatively identified as the key mortality factor. The data from site 1 showed no significant correlation between population density and mortality at the same stage. This study provides the first detailed analysis of M. testulalis populations and should contribute towards developing control strategies for this important pest of cowpea. Resume-Les donnees receuillies a partie des echantillons reguliers le long du cycle de vie de cinq generations des insectes terebrants de cosses de pois Maruca testulalis, donnees en registrees grace a la recolte faite dans un site, et sur 3 generations dans un autre, etaient utilisees pour etablir des tables de longevite et a travers des analyses des facteurs-cles en vuede determiner le facteur cle de mortalite. Le taux de mortalite entre l'ovulation et I'etat adult etait de 98.4 a 98.6% au site 1 et 98.2 a 99.4% au site 2. Dans tous les 2 sites la mortalite la plus elevee a eu lieu entre l'ovulation et la 3eme phase a I'etat pupal, tandis que la 4eme phase pupate connaissait le taux de mortalite le plus bas. La cause la plus commune de mortalite envisaged etait la disparition, suivie par la maladie. Le parasitisme contribuait tres peu a la mortalite chez le M. testulalis. Au site 1, la disparition a la phase ovulaire etait le facteur cle de mortalite et etait etroitement liee a la mortalite giobale de la generation. Au site 2, la disparition se passant lors des phases 1 et 2 etait identified comme la raison principale de la mortalite. Les donnees obtenues du site n'ont montre aucune correlation entre la densite de la population et la mortalite au meme phase. Cette etude fournit la premiere analyse detaillee des populations M. testulalis et devrait contribuer au developpement des strategies de controle de cette bete qui detruit les cosses de pois.

show abstract

“…Hu¨lsen geschu¨tzt vor natu¨rlichen Feinden und dem Kontakt mit Insektiziden. Letztendlich findet die Verpuppung geschu¨tzt im Boden statt ( Okeyo‐Owour and Ochieng , 1981).…”

Section: Introductionunclassified

Kombinierter Einsatz von synthetischen Insektiziden und Bacillus thuringiensis sowie Trichogramma evanescens gegen ausgewa¨hlte Scha¨dlinge an Vigna sesquipedalis unter tropischen Tieflandbedingungen

2001

View full text Add to dashboard Cite

Field experiments with the synthetic insecticides, Methomyl and Carbaryl, alone and in combination with the biological control agents, Bacillus thuringiensis (Bt) and Trichogramma evanescens, were conducted to control pests in yardlong beans, Vigna sesquipedalis, during the dry season 1998/1999. The experimental area was located at the Central Luzon State University in the province of Nueva Ecija on the Philippine main island Luzon. Carbaryl was applied against bean flies 5 days after plant emergence. Methomyl was sprayed against pod sucking insects and the bean podborer, Maruca vitrata, 45 days after plant emergence. The biological control agents were applied with the beginning of the flowering stage of V. sesquipedalis, when plants were first attacked by M. vitrata.Major insect pests on V. sesquipedalis were cowpea aphid (Aphis craccivora), leafminer (Liriomyza sp.), and bean podborer (M. vitrata). Both, Bt and T. evanescens had no significant impact on yield. M. vitrata eggs, exposed for 48 hours in the fields to augmented T. evanescens, were used to measure field efficacy of the parasitoid. Highest parasitism rate was 13.3 %, thus, generally low.Highest yield was obtained from plots treated with both synthetic insecticides. No significant difference in fresh pod yield was observed when, in addition to the synthetic insecticides, Bt and/or T. evanescens was applied. However, all treatments significantly out-yielded the untreated control.

show abstract

Studies on the legume pod-borer, Maruca testulalis (Geyer)—I: Life cycle and behaviour

Cited by 10 publications

References 2 publications

Effect of temperature on development and survival of the legume pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Pyralidae) reared on a semi-synthetic diet

Effect of temperature on development and survival of the legume pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Pyralidae) reared on a semi-synthetic diet

Life tables, key factor analysis and density relations in natural populations of the legume pod borer Maruca testulalis Geyer (Lepidoptera: Pyralidae) in Western Kenya

Kombinierter Einsatz von synthetischen Insektiziden und Bacillus thuringiensis sowie Trichogramma evanescens gegen ausgewa¨hlte Scha¨dlinge an Vigna sesquipedalis unter tropischen Tieflandbedingungen

Contact Info

Product

Resources

About