scholarly journals Potential Yield Reduction of Sweet and Glutinous Corn Varieties Damaged by The Invasive Pest Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae): Field Trial Scale

Author(s):  
Anak Agung Ayu Agung Sri Sunari ◽  
I Ketut Sumiartha ◽  
I Wayan Supartha ◽  
I G Febri Mahaputra ◽  
I Kadek Wisma Yudha ◽  
...  
Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1074
Author(s):  
Bonoukpoè Mawuko Sokame ◽  
Boaz Musyoka ◽  
Julius Obonyo ◽  
François Rebaudo ◽  
Elfatih M. Abdel-Rahman ◽  
...  

The interactions among insect communities influence the composition of pest complexes that attack crops and, in parallel, their natural enemies, which regulate their abundance. The lepidopteran stemborers have been the major maize pests in Kenya. Their population has been regulated by natural enemies, mostly parasitoids, some of which have been used for biological control. It is not known how a new exotic invasive species, such as the fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera, Noctuidae), may affect the abundance and parasitism of the resident stemborers. For this reason, pest and parasitism surveys have been conducted, before and after the FAW invaded Kenya, in maize fields in 40 localities across 6 agroecological zones (AEZs) during the maize-growing season, as well as at 3 different plant growth stages (pre-tasseling, reproductive, and senescence stages) in 2 elevations at mid-altitude, where all maize stemborer species used to occur together. Results indicated that the introduction of the FAW significantly correlated with the reduction of the abundance of the resident communities of maize stemborers and parasitoids in maize fields; moreover, the decrease of stemborer density after the arrival of FAW occurred mostly at both reproductive and senescent maize stages. It also suggests a possible displacement of stemborers by FAW elsewhere; for example, to other cereals. However, since this study was conducted only three years after the introduction of the FAW, further studies will need to be conducted to confirm such displacements.


Author(s):  
Min Fang ◽  
Sihan Lu ◽  
Ling Yao ◽  
Renwen Zheng ◽  
Jianhua Huang ◽  
...  

Spodoptera frugiperda (Lepidoptera: Noctuidae) is an invasive pest that ravaging crops in many provinces of China. In order to specifically control this invasive pest, understanding of the relationship between the insect and the host is necessary. In this study, we have compared the biological and nutritional indexes of S. frugiperda by feeding it with five different host-plants (Zea mays, Triticum aestivum, Digitaria sanguinalis, Glycine max and Eleusine indica). The biological and nutritional indexes of Z. mays feeding S. frugiperda were the best. However, the pupa weight and fecundity of S. frugiperda fed with G. max and E. indica were significantly lower than those fed with other hosts, efficiency of conversion of digested food (ECD) and efficiency of conversion of ingested food (ECI) were also lower than others. The total phenol content was negatively correlated with the biological and nutritional indexes of S. frugiperda, while the C/N content was positively correlated. When fed on different host plants, the biological and nutritional indexes of S. frugiperda were different, but all of them could complete the life cycle. Therefore, in the absence of Z. mays, the S. frugiperda may also harm other host plants, and host plants with high C/N content can also with the risk of being infected.


2021 ◽  
Vol 13 (4) ◽  
pp. 1231-1237
Author(s):  
M. Priyanka ◽  
P. Yasodha ◽  
C.Gailce Leo Justin ◽  
J. Ejilane ◽  
Venugopal Rajanbabu

An invasive pest, fall armyworm, Spodoptera frugiperda (J.E.Smith) (Lepidoptera: Noctuidae) attacks maize at every stage of development, from seedling emergence up to cob formation. Early instar larvae were seen mostly on leaves of maize with characteristics pin or shot hole symptoms. Later instar larvae were confined to deep whorls, leaving typically ragged like appearance and fed on the reproductive stage of the crop especially tassels and developing cobs resulting in quality and quantity loss of maize produce. The effect of commercially available Bacillus thuringiensis subsp. kurstaki product, Dipel® against the second instar larvae of Fall Armyworm (FAW )was not promising under laboratory conditions. Hence, an effort was made to add an adjuvant along with B. thuringiensis to increase the virulence of commercially available B. thuringiensis.The Laboratory bioassays with B. thuringiensis and seven chemical additives ( T1- Bt + Boric acid, T2- Bt + Zinc oxide, T3- Bt + Sodium nitrate, T4- Bt + Peptone, T5- Bt + Urea, T6- Bt + EDTA, T7- Bt + Citric acid & T8-  Bt alone T9- Control) were tested against second instar larvae of Spodoptera frugiperda larvae. The results showed that B. thuringiensis plus sodium nitrate (T3) promoted maximum mortality 82.2 per cent with a minimum LC50 value of 54.620 mg/l. Sodium nitrate boosted B. thuringiensis activity at a concentration of 0.05 per cent by 2.128-fold than B. thuringiensis alone. Overall, sodium nitrate improved the efficacy of B. thuringiensis spray at the maximum level followed by boric acid, urea, EDTA and peptone.


2020 ◽  
Vol 4 (3) ◽  
pp. 149-153
Author(s):  
Ahmad Hassan Tahir ◽  
Muhammad Tariq ◽  
Aqsa Mazhar ◽  
Muhammad Shehzad

Spodoptera frugiperda (Lepidoptera: Noctuidae) commonly known as fall armyworm (FAW), is a pest that invaded the sub-tropical and tropical regions of America. In 2016, it was reported for the first time in central Africa and within a year it was reported from many countries of Africa. It then spread in Asia and in 2018 it was reported in India, and now its infestation was seen in Pakistan. Its strong flight, climatic adaptableness and large host range makes it a good colonizing agent as compared to other species of Spodoptera. In potential managing strategies we must know about its primary information such as its biology, host range, habitat and favorable conditions. Identification and life cycle is the most important process in the management of this pest. IPM strategies include physical and cultural control, botanical control, biological control and chemical control. These strategies will help in management of FAW. All these aspects have been reviewed in this article.


2021 ◽  
Vol 9 (3) ◽  
pp. 156-160
Author(s):  
Muhammad Ramzan ◽  

Fall armyworm, Spodoptera frugiperda is considered an important noctuid moth pest of agricultural crops all over the world and recently become an invasive pest in Pakistan. The crops belonging to Asteraceae, Fabaceae and Poaceae families are highly affected with this pest. The description of host plants is very important in understanding the biology, ecology and application of most effective techniques against the pest. By keeping in view, the importance of this pest, the current study was conducted to evaluate the most preferable host plant such as maize, potato, cabbage, cotton and lehli for this pest in the study area. The results showed that cabbage and maize were the most suitable hosts for larval feeding. The incubation period was recorded 2.00 and 2.12 days on cabbage and maize, respectively. The developmental period of larvae was found longer on cabbage as compared to maize. Potato, cotton and lehli were not found suitable for pest rearing. The study concluded that maize and cabbage are the most suitable hosts for S. frugiperda larvae under natural and controlled conditions.


Insects ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 157 ◽  
Author(s):  
Jannet Jaraleño-Teniente ◽  
J. Refugio Lomeli-Flores ◽  
Esteban Rodríguez-Leyva ◽  
Rafael Bujanos-Muñiz ◽  
Susana E. Rodríguez-Rodríguez

Spodoptera frugiperda (Smith) is the main maize pest in America and was recently detected as an invasive pest in some countries in Asia and Africa. Among its natural enemies presented in Mexico, Trichogramma pretiosum Riley is the only egg parasitoid used in Integrated Pest Management (IPM) programs regardless of its effectiveness. A search for natural enemies of S. frugiperda was then carried out to determine whether this parasitoid has been established, and to detect native egg parasitoids or predators associated with this pest. The sentinel technique (egg masses) was used, and then placed in maize and sorghum fields in the state of Guanajuato, Mexico. Trichogramma atopovirilia Oatman and Platner, an egg parasitoid, and Chelonus insularis Cresson egg-larva parasitoid were recovered from field surveys. Among the natural enemies that preyed on eggs of S. frugiperda, we found mites of the genus Balaustium, and Dermaptera of the genus Doru, both species in great abundance. Laboratory tests were performed to compare the potential parasitism of T. atopovirilia against T. pretiosum. T. atopovirilia obtained 70.14% parasitism while T. pretiosum, 29.23%. In field cages, three doses of the parasitoids were tested. Total parasitism did not exceed 8% in any of the two species, but T. atopovirilia parasitized a greater number of hosts using two and three parasitoids per pest egg. Then, the use of Trichogramma species needs to be reevaluated in biological control programs against S. frugiperda.


2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Elizabeth Njuguna ◽  
Phophi Nethononda ◽  
Karim Maredia ◽  
Ruth Mbabazi ◽  
Paul Kachapulula ◽  
...  

Abstract It has been over five years since the first report of an outbreak of the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in Africa. The highly invasive pest, native to the Americas, has since spread across the African continent attacking many crops and causing significant yield loss to Africa’s staple crop, maize. From the onset of the outbreak, there have been massive and varied responses from farmers, governments and nongovernmental organizations. This mini-review provides various perspectives on S. frugiperda control in sub-Saharan Africa, building on previously published evidence, and experiences of the authors. It also highlights new technologies and lessons learned so far from the S. frugiperda outbreaks in sub-Saharan Africa, based on which suggestions on possible integrated management approaches are proffered.


2019 ◽  
Vol 102 (3) ◽  
pp. 619 ◽  
Author(s):  
Sharanabasappa , ◽  
C. M. Kalleshwaraswamy ◽  
J. Poorani ◽  
M. S. Maruthi ◽  
H. B. Pavithra ◽  
...  

2020 ◽  
Vol 20 (2) ◽  
pp. 85-91
Author(s):  
Sempurna Ginting ◽  
Nadrawati Nadrawati ◽  
Agustin Zarkani ◽  
Teten Sumarni

Natural incidence of entomopathogenic fungus Nomuraea rileyi on Spodoptera frugiperda infesting corn in Bengkulu. Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) is a new invasive pest in corn. The intensive use of synthetic insecticides for pest control causing various problems such as resistance, pest resurgence, and environmental damage. To solve these problems, entomopathogenic fungi could be used as an alternative in pest management. Therefore, this study was aimed to determine the natural incidence of Nomuraea rileyi (Farlow) Samson (Hypocreales: Clavicipitaceae) entomopathogenic fungus on S. frugiperda in Bengkulu. The research was carried out by exploring the corn producing areas in Bengkulu for                N. rileyi incidence. The results showed that the N. rileyi was occurred naturally infected S. frugiperda larvae reached 79.0%. Meanwhile, the percentage of crops damage due to S. frugiperda was ranged from 40.0 to 96.0%. The highest natural incidence of N. rileyi  were found in the Village of Bukit Barisan and Tugu Rejo (79.0%), followed by Pulo Geto Baru (25.0%), and Taba Mulan (5.3%) while the lowest incidence was in Sidomulyo (1.0%). The infected larvae were not found in the Napal, Beringin Raya 1, and Beringin Raya 2, despite the percentage of S. frugiperda attacks was reached 50.0; 50.0 and 74.0%, respectively.


Sign in / Sign up

Export Citation Format

Share Document