Yaherwandi Yaherwandi
Plant Pest and Diseases Department, Agriculture Faculty Andalas University, Padang, 25163, Indonesia

Published : 5 Documents

Found 5 Documents

Kajian Parasitoid: Eriborus Argenteopilosus Cameron (Hymenoptera : Ichneumonidae) pada Spodoptera. Litura fabricius (lepidoptera : Noctuidae)

Sainstek Vol 11, No 1 (2008): Vol. XI No. 1, September 2008
Publisher : Lembaga Penelitian Universitas Negeri Padang

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Study of parasitoid Eriborus argenteopilosus Cameron (Hymenoptera : Ichneumonidae) on S. litura Fabricius (Lepidoptera: Noctuidae) was conducted in laboratorium Entomology Departement Plant pest and desease Faculty of agriculture, Andalas University in January to March 2006. The study was used biological assay methode to known parasititation and potential fecundity of  parental parasitoid. The result showed that fluctuation parasititation (63 - 17,99 %) and superparasitisme (36,67 - 3,33%) E. argenteopilosus on S. litura Potential fecundity of E. argenteopilosus 182,3±72 and potential release  73,7±49 eggs. The survival of parental adult  E. argenteopilosus only 6 days in laboratorium. Key words : E. argenteopilosus, Parasititation,  S. litura

Struktur Komunitas Hymenoptera Parasitoid Pada Ekosistem Sayuran dan Vegetasi Non-Crop di Sumatera Barat

Jurnal Biologi Edukasi Vol 2, No 2 (2010): Jurnal Biologi Edukasi
Publisher : Jurnal Biologi Edukasi

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Hymenoptera parasitoids have an important role in agroecosystem because of their ability in suppressing pest population. Their presences in the field are seen as the key to agricultural ecosystem. Their presence can be influenced by the availability of non-crop vegetation. Some adult Hymenoptera parasitoids require food in the form of pollen and nectar of wild flowers to ensure effective reproduction and longevity. The objective of this research is to study Hymenoptera parasitoid communities in vegetable field and non-crop vegetation at Alahan Panjang and Kayu tanduak agricultural landscapes. Insects were sampled by two trapping techniques (farmcop and sweep net) in one lines of transect for each landscape. Total of 62species from 19 families of Hymenoptera parasitoid were collected invegetable field and  non-crop vegetation at Alahan Panjang and Kayu Tanduak landscape. Landscape structure affected the species richness, diversity and evenness of Hymenoptera parasitoid invegetable field and  non-crop vegetation.

BIOLOGI Nilaparvata lugens Stall (Homoptera : Delphacidae) PADA EMPAT VARIETAS TANAMAN PADI (Oryza sativa L.)

Jurnal Biologi Edukasi Vol 1, No 2 (2009): Jurnal Biologi Edukasi
Publisher : Jurnal Biologi Edukasi

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Biological parameters of insect pests is very important in testing the resistance of rice plants against brown plant hopper. This research aims to study the amount and duration of stage egg, nymph, imago, and the life cycle of brown plant hopper on four varieties of rice. The methods used in research was Complete Random Design  with four treatments (variety of IR 64, Batang Piaman, Cisokan, and IR 42) and eight replications. Research data were analyzed using variance analysis and continued with List Significant Different (LSD) at 5% level. The results of research showed that the number and duration of stage egg, nymph, imago, and cycle time of brown plant hopper in four rice varieties were different. Number of egg, nymph, and imago were lowest in 64 IR varieties, while the highest was IR 42 variety. Stage of eggs and nymphs were the shortest in IR 42 varieties, while the longest were IR variety 64. Imago stage was the shortest in IR 64 variety, while longest was the variety IR 42. The life cycle of brown plant hopper were shortest in IR 42 varieties, while longest was the variety IR 64. The results of this study can be concluded that the IR 64 varieties more resistant than the varieties IR 42, Cisokan, and Batang Piaman based on stage of egg, nymph, and imago.

Biologi dan Statistik Demografi Coccinella transversalis Thunberg (Coleoptera: Coccinellidae), Predator Aphis gossypii Glover (Homoptera: Aphididae)

Jurnal Perlindungan Tanaman Indonesia Vol 22, No 1 (2018)
Publisher : Universitas Gadjah Mada

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Biology and demographic statistics of lady beetle Coccinella  transversalis Thunberg (Coleoptera: Coccinellidae) using Aphis gossypii (Hemiptera: Aphididae) as prey was studied in laboratory. Development of  C. transversalis from egg to adult was 31.02±4.73 days. The egg stage lasted for 2.33±0.58 days. Larva stage has four instars, which lasted for 2.43±0.19 days (instar I); 2.53 days±0.19 (instar II); 2.64±0.04 days (instar III), and 2.77±0.21 days (instar IV). A female laid 90.44±14.38 eggs. Meanwhile, gross reproduction rate (GRR) of C. transversalis was 74.80 individuals per generation, the net reproduction rate (R0) was 18.22 individual per female per generation, the innate capacity for increase (rm) was 0.46 individual female per day, the mean generation time (T) 12.40 days, and the double population value (DT) was 1.51 days. IntisariMasa perkembangan pradewasa dan imago serta keperidian Coccinella  transversalis (Thunberg) (Coleoptera: Coccinellidae) telah diteliti di laboratorium dengan menggunakan Aphis gossypii (Glover) (Homoptera: Aphididae) sebagai mangsa. Masa perkembangan C. transversalis sejak stadium telur hingga menjadi imago adalah 31,02±4,73 hari. Perkembangan larva terdiri dari empat instar, masa perkembangan instar I sampai IV berturut-turut adalah 2,43±0,19 hari; 2,53±0,19 hari; 2,64±0,04 hari, dan 2,77±0,21 hari, dengan masa pupa 3,18±0,77 hari. Umur imago betina C. transversalis lebih panjang jika dibandingkan dengan imago jantan yakni 15,14±1,90 dan 13,63±1,00 hari. Imago betina meletakkan telur setelah melewati masa pra oviposisi selama 2,67±0,58 hari. Masa oviposisi C. transversalis yakni 8,97±0,89 hari dengan jumlah telur yang diletakkan yakni 90,44±14,38 butir. Parameter demografi C. transversalis adalah laju reproduksi kotor (GRR) adalah 74,80 individu per generasi; laju reproduksi bersih (Ro) 18,22 individu per induk per generasi; laju pertumbuhan intrinsik (rm) sebesar 0,46 individu per induk per hari; masa rata-rata generasi (T) selama 12,40 hari; dan nilai pelipatgandaan populasi (DT) adalah 1,51 hari. 

Struktur Komunitas Hymenoptera Parasitoid Pada Berbagai Lanskap Pertanian Di Sumatra Barat

Jurnal Entomologi Indonesia Vol 6, No 1 (2009): April
Publisher : Perhimpunan Entomologi Indonesia

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Understanding how the landscape structure affect the interaction between crops, pests and their natural enemies is a complex problem that can significantly impact on the success or failure of insect biological control. Hymenoptera parasitoids are particularly important natural enemies because of their great diversity and effectiveness as agents of biological control. The objective of this research is to study the diversity of Hymenoptera parasitoid on some vegetables and rice ecosystem in West Sumatera. Hymenoptera parasitoids were sampled using three trapping techniques (farmcop, insect net and yellow pan trap). Species accumulative curves, Jackknife-1 estimator, and indices of diversity were applied to analyze the data. Results indicated that there were 1522 specimen consist of 22 families and 148 species of Hymenoptera parasitoid on agricultural ecosystem in west Sumatera. Braconidae and Ichneumonidae were dominant Hymenoptera parasitoid family in vegetables ecosystem. Contrast, Mymaridae, Diapriidae, and Eulophidae were dominance of Hymenoptera parasitoid famili in rice ecosystem. Diversity of Hymenoptera parasitoid was influenced by the landscape structure. Species richness and diversity were higher in polyculture ecosystem than monoculture.