scholarly journals Egg cluster characteristics of fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidea) in Sri Lanka under laboratory conditions

2022 ◽  
Vol 17 (1) ◽  
pp. 200
Author(s):  
R. H. Kasige ◽  
C. D. Dangalle ◽  
N. Pallewatta ◽  
M. T. M. D. R. Perera
Keyword(s):  
Sri Lanka ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Laboratory Conditions

scholarly journals INSETICIDAL OILS FROM AMAZON PLANTS IN CONTROL OF FALL ARMYWORM

2016 ◽  
Vol 29 (3) ◽  
pp. 642-647 ◽  
Author(s):  
ANA CLÁUDIA VIEIRA DOS SANTOS ◽  
CARROMBERTH CARIOCA FERNANDES ◽  
LUCAS MARTINS LOPES ◽  
ADALBERTO HIPÓLITO DE SOUSA
Keyword(s):  
Plant Species ◽  
Spodoptera Frugiperda ◽  
Integrated Management ◽  
Fall Armyworm ◽  
High Efficacy ◽  
Carapa Guianensis ◽  
Laboratory Conditions ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Lepidoptera Noctuidae

ABSTRACT The potential insecticidal of oils from southwestern Amazon plants against Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) was investigated. Initial bioassays were performed with undiluted oils from 11 plant species. The efficacy of the oils was evaluated against eggs and third -instar caterpillars of S. frugiperda. The oils of Copaifera sp. (Leguminosae), Orbignya phalerata (Arecaceae), and Carapa guianensis (Meliaceae) displayed a high efficacy against the caterpillars and were used in subsequent concentration-response bioassays, at concentrations established through preliminary tests. The highest nonlethal concentrations of oils and the lowest lethal concentrations were calculated. A completely randomized design was adopted in both bioassays. The LC50 of the oils varied from 7.50 to 60.84% (v/v). Copaifera sp. oil had the highest toxicity and was 6.84-fold more toxic than O. phalerata oil and 8.11-fold more toxic than Carapa guianensis oil. In general, oils from Copaifera sp., O. phalerata, and Carapa guianensis were effective in controlling S. frugiperda caterpillars under laboratory conditions, and are good candidates for use in integrated management programs of corn pests.

ADULT CALOSOMA SAYI (COLEOPTERA: CARABIDAE) AS A PREDATOR ON FALL ARMYWORM PUPAE

1985 ◽  
Vol 20 (2) ◽  
pp. 220-224
Author(s):  
Orrey P. Young
Keyword(s):  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Soil Surface ◽  
Laboratory Conditions

Pupae of the fall armyworm, Spodoptera frugiperda (J. E. Smith), placed on the soil surface or partially buried under laboratory conditions, were readily consumed by adult Calosoma sayi DeJean. Predation did not occur when pupation in the soil occurred naturally or when pupae were artificially buried in the soil at various depths.

scholarly journals Fall Armyworm (FAW) Epidemic in Sri Lanka: Ratnapura District Perspectives

2019 ◽  
Vol 7 (1) ◽  
pp. 09-18
Author(s):  
Nadeeka Perera ◽  
Manjula Magamage ◽  
Aruna Kumara ◽  
Harshana Galahitigama ◽  
Kapila Dissanayake ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Spodoptera Frugiperda ◽  
Short Communication ◽  
Fall Armyworm ◽  
Small Scale ◽  
North Central ◽  
Pest Damage ◽  
Recent Outbreak ◽  
Farming Families ◽  
The Government

A recent outbreak of FAW (Spodoptera frugiperda) caused a substantial yield loss in corn was recorded in Sri Lanka especially from Uva, Eastern and North Central provinces. This was first reported in Sri Lanka in August 2018 and over the last six months, the livelihood of the majority of small-scale farming families was greatly affected. National mobilization of resources, agriculture related institutions together with university academia actively participated with the government campaign of combating the pest and improving the livelihood of affected people all over the country. The effort of this short communication is to describe the magnitude of FAW infestation, its implications in Ratnapura District, Sri Lanka and the contribution of the inter-institutional support towards the sustainable management of the Fall ArmyWorm epidemic in Sri Lanka. Amount of land extent used for corn cultivation in Ratnapura district was estimated as 292.65ha, while 32.95 ha were infected with the pest (11.3%). Highest provincial land extent use for corn in Sri Lanka was Uva province where considerable pest damage has been reported. In Uva, total 42436.7 ha were cultivated in maha season where 30998.3 ha has infected and destroyed (73%). Even though corn was cultivated in lower land extent in Ratnapura, effective and organized disaster management response in Ratnapura was able to minimize the pest impact to 11.3% from total losses.

scholarly journals Effect of Temperature on Life Cycle of Spodoptera frugiperda under Laboratory Conditions

2021 ◽  
Vol 9 (3) ◽  
pp. 32-38
Author(s):  
Muhammad Ramzan ◽  
Keyword(s):  
Life Cycle ◽  
High Temperature ◽  
Environmental Factors ◽  
Spodoptera Frugiperda ◽  
Growth And Development ◽  
Insect Pests ◽  
Larval Instar ◽  
Fall Armyworm ◽  
Effect Of Temperature ◽  
Laboratory Conditions

Fall armyworm, Spodoptera frugiperda (Diptera:Lepidoptera) is a destructive pest of agricultural crops especially maize in many countries including Pakistan. The environmental factors like temperature play significant role in the growth and development of insect pests. It is very important to know the proper knowledge about effect of temperature on the development of Spodoptera frugiperda before managing this pest. For this purpose, the current study was conducted to check the effect of temperature (20 and 26◦C) on the life cycle of S. frugiperda under laboratory conditions. The results showed that the developmental times of all stages (eggs, larvae and pupae) were inversely related to temperature. The incubation period of eggs was 4.01±0.00b and 2.00±0.00b at 20 and 26◦C, respectively. The development time of first, second, third, fourth, fifth and sixth larval instar was 3.51±0.10b, 3.04±0.15b, 2.33±0.10b, 2.97±0.14b, 3.45±0.19b and 4.99± 0.22b, respectively at 20◦C while 2.77±0.13c, 2.89±0.20bc, 2.09±0.12bc, 2.22±0.17bc, 2.90±0.23c and 3.56±0.19b, respectively at 26◦C. The time of growth and development was increased at low temperature while reduced at high temperature. The food consumption rate and molting period of larvae can increase at high temperature for complete their growth and development. The current study concluded that environmental factors like temperature are highly effect the insect pests morphology and biology.

scholarly journals Toxicity of entomopathogenic fungi against Spodoptera frugiperda larvae under laboratory conditions

2021 ◽  
pp. 355-358
Author(s):  
Shahzad Muhammad Ayaz ◽  
Irfan Muhammad ◽  
Wahab Ahmad Abdul ◽  
Zafar Farhan ◽  
Abdulrehman Abdulrehman ◽  
...  
Keyword(s):  
Entomopathogenic Fungi ◽  
Spodoptera Frugiperda ◽  
Larval Mortality ◽  
Fall Armyworm ◽  
Effective Control ◽  
Laboratory Conditions ◽  
Important Pest ◽  
Early Instar ◽  
Field And Laboratory Conditions ◽  
Lepidoptera Noctuidae

Maize Fall Armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae) is considered an economically important pest and becoming the main threat to food security. This polyphagous pest is widely distributed in various countries of the world especially tropical and subtropical regions. The toxicity of two entomopathogenic fungi such as Metarhizium anisopliae and Beauveria bassiana were evaluated against 2nd instar larvae of FAW under controlled conditions. The results showed that among tested entomopathogenic fungi, B. bassiana was found more toxic than M. anisopliae. B. bassiana caused 79% larval mortality while M. anisopliae 59%. M. anisopliae and B. bassiana were showed LT50 of 84.01 h and 80.99 h, respectively. M. anisopliae and B. bassiana were showed LC50 of 1.3×107 and 1.8×107 spores ml−1, respectively. The current study concluded that Entomopathogenic fungi can give effective control against early instar and further studies are needed to check the efficacy against older instars under field and laboratory conditions.

scholarly journals Insecticide resistance monitoring for the invasive populations of fall armyworm, Spodoptera frugiperda in China

2021 ◽  
Vol 20 (3) ◽  
pp. 783-791 ◽  
Author(s):  
Dan-dan ZHANG ◽  
Yu-tao XIAO ◽  
Peng-jun XU ◽  
Xian-ming YANG ◽  
Qiu-lin WU ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Resistance Monitoring

scholarly journals Effectiveness of Push–Pull Systems to Fall Armyworm (Spodoptera frugiperda) Management in Maize Crops in Morelos, Mexico

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 298
Author(s):  
Ouorou Ganni Mariel Guera ◽  
Federico Castrejón-Ayala ◽  
Norma Robledo ◽  
Alfredo Jiménez-Pérez ◽  
Georgina Sánchez-Rivera ◽  
...  
Keyword(s):  
Spodoptera Frugiperda ◽  
Insect Pest ◽  
Fall Armyworm ◽  
Maize Yield ◽  
Morphological Development ◽  
Main Method ◽  
Development Of Resistance ◽  
Pull Systems ◽  
Complex Scenario ◽  
Block Experiment

Chemical control is the main method used to combat fall armyworm in maize crops. However, its indiscriminate use usually leads to a more complex scenario characterized by loss of its effectiveness due to the development of resistance of the insect pest, emergence of secondary pests, and reduction of the populations of natural enemies. For this reason, efforts to develop strategies for agroecological pest management such as Push–Pull are increasingly growing. In this context, the present study was carried out to evaluate field effectiveness of Push–Pull systems for S. frugiperda management in maize crops in Morelos, Mexico. In a randomized block experiment, the incidence and severity of S. frugiperda, the development and yield of maize were evaluated in nine Push–Pull systems and a maize monoculture. The Push–Pull systems presented incidence/severity values lower than those of the monoculture. Morphological development and maize yield in the latter were lower than those of most Push–Pull systems. Mombasa—D. ambrosioides, Mulato II—T. erecta, Mulato II—C. juncea, Tanzania—T. erecta and Tanzania—D. ambrosioides systems presented higher yields than those of monocultures.

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