scholarly journals PENGARUH UKURAN PARTIKEL KAOLIN TERHADAP MORTALITAS, PERTUMBUHAN DAN PERKEMBANGAN ULAT GRAYAK JAGUNG Spodoptera frugiperda (J.E. SMITH)

2021 ◽  
Vol 26 (2) ◽  
Author(s):  
Widia Herhayulika ◽  
Yusup Hidayat ◽  
Agus Susanto
Keyword(s):  
Spodoptera Frugiperda ◽  
Wetting Agent ◽  
Lepidoptera Noctuidae

Hama penting pada tanaman jagung yang baru-baru ini dilaporkan serangannya di Indonesia adalah Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae). Ukuran partikel mineral mempunyai peranan penting pada keefektifan pengendalian serangga hama. Mineral yang digunakan dalam penelitian ini adalah kaolin. Penelitian ini bertujuan untuk mengetahui pengaruh ukuran partikel mineral kaolin terhadap mortalitas, pertumbuhan dan perkembangan larva S. frugiperda. Metode penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 7 perlakuan dan 4 ulangan. Perlakuan terdiri atas formulasi mineral kaolin konsentrasi 4% dengan ukuran saringan 100, 200, 300, 400 dan 500 mesh, kontrol air dan kontrol wetting agent+dispersant agent. Hasil penelitian menunjukkan bahwa ukuran partikel mineral kaolin berpengaruh terhadap mortalitas, lama perkembangan, berat pupa dan kemunculan imago S. frugiperda. Mineral kaolin ukuran partikel 500 mesh menghasilkan mortalitas larva S. frugiperda (28,75%) yang berbeda nyata dengan kontrol (0,00%) pada 48 jam setelah perlakuan. Sementara itu, pada pengamatan 23 hari setelah perlakuan, semua ukuran partikel mineral kaolin yang diuji menyebabkan mortalitas larva S. frugiperda sebesar 31,25 – 51,25%, yang berbeda nyata dengan kontrol (0,00%). Perlakuan mineral kaolin 500 mesh menghasilkan total perkembangan larva dan pupa yang terlama yaitu 22,25 hari, berat pupa paling rendah yaitu 0,1506 g serta kemunculan imago normal yang terendah yaitu 8,00 ekor (dari 20 larva yang diberi perlakuan).

scholarly journals Exigências térmicas e estimativa do número de gerações dos biótipos "milho" e "arroz" de Spodoptera frugiperda

2005 ◽  
Vol 40 (4) ◽  
pp. 329-335 ◽  
Author(s):  
Gustavo Rossato Busato ◽  
Anderson Dionei Grützmacher ◽  
Mauro Silveira Garcia ◽  
Fabrizio Pinheiro Giolo ◽  
Moisés João Zotti ◽  
...  
Keyword(s):  
Spodoptera Frugiperda ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Lepidoptera Noctuidae

O objetivo deste trabalho foi avaliar o efeito da temperatura sobre a biologia dos biótipos "milho" e "arroz" de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) e estimar o número de gerações por ano em laboratório e campo. Foram coletadas lagartas de quatro populações de S. frugiperda no Estado do Rio Grande do Sul, identificadas eletroforeticamente como os biótipos "milho" e "arroz", em áreas isoladas, distanciadas entre si em mais de 300 km, produtoras de milho e arroz irrigado e em áreas adjacentes, que produzem milho e arroz irrigado lado a lado. A temperatura mais adequada para o desenvolvimento dos dois biótipos foi 25ºC. Em laboratório, podem ser obtidas 11,0 e 11,3 gerações ano-1 do biótipo "milho" proveniente de áreas isoladas e adjacentes, respectivamente. Foram estimadas 12,1 gerações ano-1 do biótipo "arroz" quando proveniente de áreas isoladas e 12,2 gerações ano-1 quando proveniente de áreas adjacentes. Em campo, estimou-se a ocorrência de 8,3 e 6,1 gerações ano-1 do biótipo "milho", respectivamente, em áreas isoladas e áreas adjacentes e 8,4 e 7,0 gerações ano-1 do biótipo "arroz", respectivamente, em áreas isoladas e áreas adjacentes. Em áreas adjacentes, o biótipo "arroz" apresenta uma geração a mais ao longo de um ano em relação ao biótipo "milho".

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.

scholarly journals First record of a parasitoid, Megaselia (M) scalaris (Diptera: Phoridae) of fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) from India

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Sharanabasappa S. Deshmukh ◽  
S. Kiran ◽  
Atanu Naskar ◽  
Palam Pradeep ◽  
C. M. Kalleshwaraswamy ◽  
...  
Keyword(s):  
Outer Surface ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
First Record ◽  
Instar Larva ◽  
Major Threat ◽  
Megaselia Scalaris ◽  
Maize Cultivation ◽  
First Time ◽  
Lepidoptera Noctuidae

AbstractThe fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), has become a major threat in maize cultivation since its invasion to India in 2018. The humpbacked fly, Megaselia scalaris (Loew) (Diptera: Phoridae), was recorded as a laboratory parasitoid of FAW, for the first time in India. Initially, 30–40 maggots of M. (M) scalaris emerged out from the dead pre-pupa and pupa of laboratory-reared FAW. The fly laid up to 15 eggs on the outer surface of 6th instar larva or pre-pupa of the FAW. The incubation period was 1–2 days. The fly had 3 larval instars which lasted 3–4 days and a pupal period of 10–11 days. The adults survived for 6–7 days.

Biochemical Analysis of a Castor Bean Leaf Extract and its Insecticidal Effects Against Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae)

2012 ◽  
Vol 41 (6) ◽  
pp. 503-509 ◽  
Author(s):  
G D Rossi ◽  
C D Santos ◽  
G A Carvalho ◽  
D S Alves ◽  
L L S Pereira ◽  
...  
Keyword(s):  
Spodoptera Frugiperda ◽  
Castor Bean ◽  
Leaf Extract ◽  
Biochemical Analysis ◽  
Lepidoptera Noctuidae

scholarly journals Frequency of Cry1F Non-Recessive Resistance Alleles in North Carolina Field Populations of Spodoptera frugiperda (Lepidoptera: Noctuidae)

PLoS ONE ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. e0154492 ◽  
Author(s):  
Guoping Li ◽  
Dominic Reisig ◽  
Jin Miao ◽  
Fred Gould ◽  
Fangneng Huang ◽  
...  
Keyword(s):  
North Carolina ◽  
Spodoptera Frugiperda ◽  
Recessive Resistance ◽  
Lepidoptera Noctuidae
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