scholarly journals The Biology of Fall Army Worm (Spodopterafrugiperda. J. E. Smith) in Sudan

2020 ◽  
Vol 4 (1) ◽  
pp. 1-5
Author(s):  
Nada Elsheikh M. Kona ◽  
Awad KhalafallaTaha ◽  
Mohammed E. E. Mahmoud ◽  
Abubaker Haroun Mohamed Adam
Keyword(s):  
Spodoptera Frugiperda ◽  
Control Measure ◽  
Block Design ◽  
Fall Armyworm ◽  
Invasive Pest ◽  
Effective Management ◽  
Egg Incubation ◽  
Randomized Complete Block Design ◽  
One Year ◽  
Army Worm

The Fall armyworm (Spodoptera frugiperda) is considered among the economic important pests in Sudan. Therefore, it became necessary to study and understand its biology and find out the appropriate control measure (s). To achieve the above objective, experiments based on Randomized Complete Block Design (RCBD) were carried out during the period from September 2018 to August 2019, where the Fall armyworm (FAW) was reared in the laboratory and fed on a nutrient médium composed of Corn leaves. The results displayed the ranges of eggs laid by a female was 890–1169. The egg incubation period ranged between 3-13 days. The larval duration ranged between (13-50) days and the pupal duration was between (7-20) days under a temperature of 21-300c and a Relative Humidity (RH) of 65 ± 5%. The longevity of the adults was 1-20 days, and the range of the full lifecycle was (24-100). However, six generations of FAW were obtained within one year. This study concludes that in Sudan FAW breeds continously throughtout the year and it recommends further studies on the biology and effective management of this invasive pest

scholarly journals Impact of an Exotic Invasive Pest, Spodoptera frugiperda (Lepidoptera: Noctuidae), on Resident Communities of Pest and Natural Enemies in Maize Fields in Kenya

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1074
Author(s):  
Bonoukpoè Mawuko Sokame ◽  
Boaz Musyoka ◽  
Julius Obonyo ◽  
François Rebaudo ◽  
Elfatih M. Abdel-Rahman ◽  
...  
Keyword(s):  
Natural Enemies ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Invasive Pest ◽  
Growth Stages ◽  
Insect Communities ◽  
Exotic Invasive Species ◽  
Before And After ◽  
Exotic Invasive ◽  
Lepidoptera Noctuidae

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.

Revisiting the sex pheromone of the fall armyworm Spodoptera frugiperda, a new invasive pest in South China

2021 ◽  
Author(s):  
Nan‐Ji Jiang ◽  
Bao‐Tong Mo ◽  
Hao Guo ◽  
Jun Yang ◽  
Rui Tang ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
South China ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Invasive Pest

scholarly journals EFFECT OF UNILATERAL NEPHRECTOMY ON KIDNEY FUNCTION IN FERAL DOMESTIC CATS (Felis catus)

2019 ◽  
Vol 7 (2) ◽  
pp. 101-107
Author(s):  
Dionesio A. Estopa
Keyword(s):  
Kidney Function ◽  
Block Design ◽  
Age Groups ◽  
Unilateral Nephrectomy ◽  
Domestic Cats ◽  
Experimental Animals ◽  
Operative Care ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
One Year

This experimental study was conducted to determine the effect of unilateral nephrectomy on kidney function through hematological and urological values after surgery using feral domestic cats.  Four (4) apparently healthy stray male cats were caught and used as experimental animals in this study. The animals were grouped into two (2) with two cats in each group. Grouping of the animals was based according to age, the 1st group – ages one year and above (>1 year) and the 2nd group – ages one year and below (<1 year).  A split plot randomized complete block design was used in the experiment. The result shows that rectal temperature and packed cell volume have been affected on both age group of cats and other urological values like the presence of urobilinogen, protein, leukocytes, erythrocytes and crystals were elevated twenty four hours after surgery. A significant increase on the level of creatinine and blood urea nitrogen has been noted from the 3rd and 15th post – operative day. However, no significant difference was noted between experimental animals and the two age groups, all of which have similar result. The findings of the study revealed that the remaining kidney could not completely compensate the function of the other kidney up to the 15th post – operative day, it may take longer than fifteen days. Hence, proper supportive treatment, post-operative care & management of animals subjected to unilateral nephrectomy is a must and should continue beyond fifteen days.

scholarly journals Occurrence and molecular identification of an invasive rice strain of fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) from Sindh, Pakistan, using mitochondrial cytochrome c oxidase I gene sequences

2021 ◽  
Author(s):  
Sumaira Yousaf ◽  
Abdul Rehman ◽  
Mariyam Masood ◽  
Kazam Ali ◽  
Nazia Suleman
Keyword(s):  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Coi Gene ◽  
Invasive Pest ◽  
Mitochondrial Cytochrome ◽  
Cytochrome C Oxidase I ◽  
Gene Sequences ◽  
Rice Strain

AbstractThe fall armyworm (FAW), an invasive pest of maize, is an emerging threat in Southern Asia after America and Europe. Recently, this notorious pest has also been found in different areas of Pakistan. To assess its presence in Pakistan, a survey was carried out in the provinces of Punjab, Sindh, and Khyber Pakhtunkhwa during May–October 2019. We observed the highest incidence of FAW in Sindh with maximum impact in districts Tando-Allahyar and Hyderabad. These samples were identified as Spodoptera frugiperda on the morphological and taxonomical bases. However, morphological identification of this pest is very difficult at early larval instars. Here, we use the mitochondrial cytochrome c oxidase I (COI) gene region for the precise identification of larva of this invasive pest at species level. Two different regions of COI gene (COI-5′ and COI-3′) were used as molecular markers for the identification of this species. DNA sequence similarity searches of the obtained COI gene sequences (NCBI GenBank Accession Nos. MW241537, MW241538, MW349515, MW349516, MW349493 and MW349494) revealed that genetically it is more than 99% identical to S. frugiperda. The phylogenetic analysis indicated it as the rice-strain (R-strain). Both 3′- and 5′-fragment tree topologies showed that the collected samples of the FAW species belong to the R-strain. To the best of our knowledge, this is the first report providing molecular evidence for the existence of R-strain of S. frugiperda that was found feeding on maize crop in Sindh, Pakistan, using COI gene sequences as a marker.

scholarly journals Examination of Acephate Absorption, Transport, Metabolism, and Accumulation in Maize After Root Irrigation for Spodoptera Frugiperda Control

2021 ◽  
Author(s):  
jiyingzi Wu ◽  
xianjia Li ◽  
ruiquan Hou ◽  
kunyu Zhao ◽  
yongqin Wang ◽  
...  
Keyword(s):  
Pest Control ◽  
Spodoptera Frugiperda ◽  
Control Method ◽  
Control Measure ◽  
Fall Armyworm ◽  
Extended Period ◽  
Field Trials ◽  
Pesticide Use ◽  
Control Efficacy ◽  
Maize Plants

Abstract BACKGROUND: Since the invasion of the fall armyworm moth (Spodoptera frugiperda) in China in January 2019, damage to maize crops has gradually intensified, and chemical control has become the main control measure. This study aimed to examine methods of effective pest control while monitoring the environmental impact of pesticide use. The effectiveness of S. frugiperda pest control by foliar spraying and root irrigation of maize plants with acephate was determined, and the absorption, distribution, and dissipation of acephate and methamidophos by maize were studied.RESULTS: Field trials showed that acephate treatment at 6000 g.a.i ha-1 was the most effective for controlling S. frugiperda. Acephate and methamidophos were absorbed from the roots, transported upward, and concentrated in the leaves, particularly new leaves. The terminal residues of acephate and methamidophos in maize grains were below detectable levels at 60 days after treatment.CONCLUSIONS: The results demonstrate that acephate treatment via root irrigation can more effectively control the infestation of S. frugiperda in maize than acephate treatment via foliar spraying. The translocation and distribution of acephate and methamidophos by root irrigation were more uniform, and the holding efficiency was higher than those in foliar spraying, suggesting an extended period of control efficacy. This pest control method could be utilized to reduce pesticide residues while safely and efficiently controlling S. frugiperda infestation.

scholarly journals PENGARUH PENYARUNGAN DENGAN BERBAGAI KETEBALAN PLASTIK DAN DIAMETER BUAH TERHADAP SERANGAN PENGGEREK BUAH KAKAO Conopomorha cramerella (Snellen) (LEPIDOPTERA : GRACILLARIDAE)

AGRICA ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 142-153
Author(s):  
NI MADE DELLY RESIANI
Keyword(s):  
Field Trial ◽  
Control Measure ◽  
Block Design ◽  
Medium Size ◽  
Pod Borer ◽  
Randomized Complete Block Design ◽  
Rot Disease

This research is aimed to find out the preference of cocoa pod borer to diameter, biophysical, and biochemistry cocoa pod; the percentage of infested pods, percentage of seed damaged, and percentage of yield lost. In addition, this research is also aimed to assess the effect of plastic thickness on cacao pod rot disease, the effect of sheathing on the black ant and mealybug populations on pods. This research was conducted at Selemadeg District, Tabanan Regency from October 2009 until January 2010. The field trial was arranged into randomized complete block design (RCBD) by 15 treatments were sheathing with various thickness of plastics (S0-S4) and cocoa pod diameters (B1-B3). The results indicated that, based on the percentage of the infested pod, cocoa pod borer has preferred the fruit with diameter > 4.5-7.5 cm. This condition may be contrasted, the smallest pod size (3,5-4,5 cm) was the healthiest pod, even though it contains more nutritionally compound. The smaller pod rot disease in red and green types. Sheathing by plastic of > 0.02 mm thick in medium size of pods was the most effective to prevent cocoa pod borer infestation. Sheathing with plastic was not affecting the population of both black ants and mealy bugs. Based on these results, it can be suggested that sheathing with plastic of > 0.02 mm thick on medium size of the pod is promising control measure to prevent yield lost caused by cocoa pod borer and cocoa pot rot disease.

scholarly journals The comparison of three models applied to the analysis of a three-factor trial on hybrid maize (Zea mays L.) cultivars

2016 ◽  
Vol 53 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Piotr Szulc ◽  
Iwona Mejza ◽  
Katarzyna Ambroży-Deręgowska ◽  
Kamila Nowosad ◽  
Jan Bocianowski
Keyword(s):  
Zea Mays L ◽  
Block Design ◽  
Treatment Combination ◽  
Experimental Station ◽  
Maize Cultivars ◽  
Randomized Complete Block Design ◽  
One Year ◽  
Hybrid Maize ◽  
Mixed Systems ◽  
Plot Design

SummaryThe aim of this paper is to present the comparison of three models applied to the analysis of a one-year study of protein yield for two types of hybrid maize cultivars under different forms of nitrogen fertilizer and doses of magnesium. The field trial was conducted in 2010 at the Agricultural Experimental Station in Swadzim (Poland). The results obtained were analyzed in terms of three randomization-derived models of observations. Consideration was given to three mixed systems, which are combinations of split-plot design, split-block design and randomized complete block design. The relative efficiency of the designs with respect to estimation of some comparisons among treatment combination effects was examined. Particular attention was paid to the interaction between cultivars and nitrogen fertilization.

scholarly journals Bioactivity of Common Pesticidal Plants on Fall Armyworm Larvae (Spodoptera frugiperda)

Plants ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 112 ◽  
Author(s):  
Kelita Phambala ◽  
Yolice Tembo ◽  
Trust Kasambala ◽  
Vernon H. Kabambe ◽  
Philip C. Stevenson ◽  
...  
Keyword(s):  
Pest Management ◽  
Plant Species ◽  
Plant Extracts ◽  
Spodoptera Frugiperda ◽  
Larval Mortality ◽  
Fall Armyworm ◽  
Invasive Pest ◽  
Toxicity Tests ◽  
Contact Toxicity ◽  
Foliar Damage

The fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae) is a recent invasive pest species that has successfully established across sub-Saharan Africa where it continues to disrupt agriculture, particularly smallholder cereal production. Management of FAW in its native range in the Americas has led to the development of resistance to many commercial pesticides before its arrival in Africa. Pesticide use may therefore be ineffective for FAW control in Africa, so new and more sustainable approaches to pest management are required that can help reduce the impact of this exotic pest. Pesticidal plants provide an effective and established approach to pest management in African smallholder farming and recent research has shown that their use can be cost-beneficial and sustainable. In order to optimize the use of botanical extracts for FAW control, we initially screened ten commonly used plant species. In laboratory trials, contact toxicity and feeding bioassays showed differential effects. Some plant species had little to no effect when compared to untreated controls; thus, only the five most promising plant species were selected for more detailed study. In contact toxicity tests, the highest larval mortality was obtained from Nicotiana tabacum (66%) and Lippia javanica (66%). Similarly, in a feeding bioassay L. javanica (62%) and N. tabacum (60%) exhibited high larval mortality at the highest concentration evaluated (10% w/v). Feeding deterrence was evaluated using glass-fibre discs treated with plant extracts, which showed that Cymbopogon citratus (36%) and Azadirachta indica (20%) were the most potent feeding deterrents among the pesticidal plants evaluated. In a screenhouse experiment where living maize plants infested with fall armyworm larvae were treated with plant extracts, N. tabacum and L. javanica were the most potent species at reducing foliar damage compared to the untreated control whilst the synthetic pesticide chlorpyrifos was the most effective in reducing fall armyworm foliar damage. Further field trial evaluation is recommended, particularly involving smallholder maize fields to assess effectiveness across a range of contexts.

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