scholarly journals Virulence of Entomopathogenic Fungi Isolates against Green Ladybug Nezara viridula L. (Hemiptera: Pentatomidae) Eggs

2021 ◽  
Vol 1764 (1) ◽  
pp. 012146
Author(s):  
Muhammad Agung Permadi ◽  
Rafiqah Amanda Lubis ◽  
Mukhlis ◽  
Qorry Hilmiyah Harahap ◽  
Ulfa Sari Siregar
Author(s):  
Muhammad Agung Permadi ◽  
Rafiqah Amanda Lubis ◽  
Mukhlis Mukhlis ◽  
Imam Aryo Pahlawan ◽  
Sulaiman Abdi

Green ladybug (Nezara viridula L.) is an important pest in some plants, including soybeans. N. viridula attacks cause a decrease in yield of up to 80%. Environmental friendly pest control studies are needed to overcome the problem of resurgence caused by N. viridula, among others by utilizing entomopathogenic fungus as their natural enemies. This study discusses about the efficacy of entomopathogenic fungi against N. viridula imago. The research is conducted at the Agricultural Agrotechnology Laboratory, Muhammadiyah University of South Tapanuli. The study uses a completely randomized design, nine treatments (control and eight isolates of entomopathogenic fungus) with three replications. The conidia density used is 108 conidia / ml. The entomopathogenic fungus application was performed on N. viridula imago. The results shows that MetKP fungus isolates are able to kill N. viridula imago with the highest mortality rate of 78.33%. The isolates of MetKM fungi and M. anisopliae caused the lowest imago mortality of 61.67%. Isolate of B. bassiana fungus had the lowest LT50 with a time of 5.66 HSA and the isolate of the MetTmM fungus had the highest LT50 with a time of 7.27 HSA. In the immature body part of N. viridula infected with fungus is enveloped by entomopathogenic fungal mycelium.


2020 ◽  
Vol 4 (2) ◽  
pp. 178-187
Author(s):  
Ahmad Alwi Azhari ◽  
Muhammad Sayuthi ◽  
Hasnah Hasnah

Abstrak. Nezara viridula (L.) (Hemiptera: Pentatomidae) adalah serangga hama yang bersifat kosmopolit dan mempunyai banyak tanaman inang (polifagus) antara lain kacang-kacangan dan kubis-kubisan. Serangan serangan hama ini dapat menurunkan kualitas dan kuantitas hasil tanaman. Salah satu metoda pengendalian hama yang ramah lingkungan yaitu penggunaan cendawan entomopatogen Metarhizium anisopliae sebagai agen pengendalian hayati yang dapat menyebabkan penyakit green muscardin fungus pada serangga. Keefektifan cendawan entomopatogen sangat dipengaruhi oleh stadia perkembangan inang dan kerapatan konidia cendawan yang diaplikasikan. Tujuan dari penelitian ini adalah untuk mendapatkan konsentrasi yang efektif dari cendawan M. anisopliae dan stadia perkembangan serangga yang paling rentan terhadap cendawan M. anisopliae. Rancangan yang digunakan dalam penelitian adalah Rancangan Acak Lengkap faktorial yang terdiri dari 2 faktor yaitu konsentrasi cendawan M. anisopliae: K1 (4g/100 ml), K2 (6g/100 ml) dan K3 (8g/100 ml) serta stadia perkembangan serangga: N1 (Nimfa instar 2), N2 (Nimfa instar 4) dan N3 (Imago). Menghasilkan jumlah kombinasi perlakuan 9 dengan 3 ulangan sehingga terdapat 27 unit percobaan. Hasil penelitian menunjukkan bahwa aplikasi cendawan entomopatogen M. anisopliae berpengaruh nyata terhadap masa inkubasi, mortalitas, dan waktu kematian dari N. viridula. Masa inkubasi tercepat pada 8g/ 100 ml yaitu 1,33 hari dan terlama pada 4g/ 100 ml yaitu 1,44 hari. Masa inkubasi tercepat pada nimfa instar 2 yaitu 1,00 hari dan terlama pada imago yaitu 2,11 hari. Mortalitas tertinggi yaitu pada 8g/ 100 ml sebesar 97,67% dan terendah pada 4g/ 100 ml sebesar 87,78% pengamatan 8 HSA. Mortalitas tertinggi terjadi pada nimfa instar 2 sebesar 98,89% dan terendah pada imago sebesar 86,67% pengamatan 8 HSA. Waktu kematian tercepat pada perlakuan 8g/ 100 ml sebesar 4,49 hari dan terendah pada perlakuan 4g/ 100 ml sebesar 5,50 hari. Waktu kematian tercepat pada nimfa instar 2 sebesar 4,31 hari dan terendah pada imago sebesar 6,00 hari. Cendawan entomopatogen M. anisopliae efektif dalam mengendalikan N. viridula pada nimfa instar 2 dengan konsentrasi 8g/ 100 ml.Pathogenicity of Fungi Metarhizium anisopliae (Metsch) in controlling Green Stink bug (Nezara viridula L.) at Different Developmental Stages in LaboratoryAbstract. Nezara viridula (L.) (Hemiptera: Pentatomidae) is a cosmopolitan insect pest and has many host plants (polyphagus) such as beans and cabbage. Attack of the pests can reduce the quality and quantity of crops. One of the most environmentally friendly methods of pest control is the use of entomopathogenic fungus Metarhizium anisopliae as a biological control agent can cause green muscard fungus disease in insects. The effectiveness of entomopathogenic fungi is strongly influenced by the stadia of host development and the density of conidial fungi applied. The aim of this study is to obtain an effective concentration of the fungus M. anisopliae and the stages of development of the most vulnerable insects against the fungus M. anisopliae. The design used in the study was a Factorial Randomized Complete Random consisting of two factors: the concentration of fungus M. anisopliae: K1 (4g / 100 ml), K2 (6g / 100 ml) and K3 (8g / 100 ml) and stages insect development: N1 (instar nymph 2), N2 (instar nymph 4) and N3 (Adult). Produced a combined number of treatments 9 with 3 replications so that there were 27 experimental units. The result showed that the application of entomopathogenic fungi M. anisopliae had significant effect on the incubation period, mortality, and death time of N. viridula. The fastest incubation period at 8g / 100ml is 1.33 days and the longest at 4g / 100ml is 1.44 days. The fastest incubation period in nymph instar 2 is 1.00 days and the longest in adult is 2.11 days. The highest mortality is at 8g / 100 ml of 97,67% and the lowest at 4g / 100 ml equal to 87,78% observation 8 HSA. The highest mortality occurred in instar nymph 2 of 98.89% and the lowest in adult of 86,67% observation 8 HSA. The fastest death time in the 8g / 100 ml treatment was 4.49 days and the lowest in the 4g / 100 ml treatment was 5.50 days. The fastest death time in instar nymph 2 is 4.31 days and the lowest is adult at 6.00 days. The entomopathogenic fungus M. anisopliae is effective in controlling N. viridula in instar nymph 2 with a concentration of 8g / 100 ml.


1995 ◽  
Vol 48 (2) ◽  
pp. 89-96 ◽  
Author(s):  
Tove Steenberg ◽  
Jørgen Eilenberg

2005 ◽  
Vol 57 (3-4) ◽  
pp. 221-237 ◽  
Author(s):  
Alena Kubátová ◽  
Libor Dvořák

2020 ◽  
Vol 53 (1) ◽  
Author(s):  
Anam Mehwish Khanzada ◽  
Muhammad Ali Khanzada ◽  
Rehana Naz Syed ◽  
Abdul Mubeen Lodhi

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