scholarly journals Influence of Cropping and Irrigation Systems on Population Fluctuation of the African White Rice Stem Borer (Maliarpha separatella Rag) and Damage on Rice

2015 ◽  
Vol 12 (2) ◽  
pp. 95-102
Author(s):  
V.M. Kega ◽  
J.H. Nderitu ◽  
M. Kasina ◽  
F. Olubayo
Keyword(s):  
Stem Borer ◽  
Population Fluctuation ◽  
Maliarpha Separatella ◽  
Irrigation Systems ◽  
White Rice ◽  
Rice Stem Borer

Maliarpha separatella (African white rice borer).

2021 ◽  
Author(s):  
Claire Beverley
Keyword(s):  
Indian Ocean ◽  
Stem Borer ◽  
Sub Saharan Africa ◽  
Maliarpha Separatella ◽  
Widespread Distribution ◽  
White Rice ◽  
Rice Stem Borer ◽  
Panicle Number ◽  
Plant Stage ◽  
Sub Saharan

Abstract M. separatella is a stem borer of sub-Saharan and Indian Ocean islands and is the only rice stem borer that has widespread distribution in sub-Saharan Africa. Damage by M. separatella includes reduced plant height, total number of grains per panicle, number of filled grains per panicle and grain weight, depending on the plant stage attacked.

scholarly journals Effectiveness Test of Parasitization by Parasitoid Tricogramma japonicum in Controlling White Rice Stem Borer (Scirphopaga innotata)

2021 ◽  
Vol 2 (1) ◽  
pp. 25-30
Author(s):  
Susilawati Astrodjojo ◽  
Suratman Sudjud ◽  
Sri Soenarsih DAS
Keyword(s):  
Block Design ◽  
Stem Borer ◽  
Plant Age ◽  
High Yield ◽  
Intensity Parameter ◽  
Factor B ◽  
White Rice ◽  
Rice Stem Borer ◽  
Randomized Block Design ◽  
Essential Food

Rice is an essential food crop besides corn and soybeans. The need for rice each year increases along with population growth. One of the pests affecting rice is the white rice stem borer. The present research aimed to test the effectiveness and to examine the interaction between plant age and the number of Tricogramma japonicum parasitoid. The research was carried out at the Agrotechnology Laboratory of the Faculty of Agriculture, Khairun University, Ternate, and the rice fields of Bumi Restu village SP I, East Wasile district. The research design operative was a randomized block design where factor A (A1 = 21 DAS, A2 = 42 DAS, A3 = 56 DAS) was the age of the plant, and factor B (B0 = 0, B1 = 50, B2 = 100, B3 = 150) was the number of eggs of Corcyra cephalonica. Biological control using different amounts of Trichogramma japonicum parasitoid led to different interactions and results for each tested parameter. For the number of egg groups, there was no interaction with plant age, but the treatments which were found effective in suppressing stem borer populations were B2 and B3 (100 and 150). The most effective pias as indicated by damage intensity parameter was B3 (150), which was applied to plants aged 21 DAP. Furthermore, for plant height, different number of parasitoids poses significantly effective results. Percentage unhulled grain of pias B3 (150) causes insignificant damage. For production there is no interaction with plant age, but pias B2 (100) shows high yield. The conclusion is that pias B3 (150) applied to 21 days of plants is very effective in controlling white rice stem borer.

scholarly journals UJI ATRAKTAN PADA EKSTRAK PURUN TIKUS (Eleocharis dulcis) SEBAGAI PERANGKAP HAMA PENGGEREK BATANG PADI PUTIH

2021 ◽  
Vol 9 (2) ◽  
pp. 381
Author(s):  
Kholifatu Rosyidah ◽  
Zacky Insan ◽  
Dahlena Ariyani
Keyword(s):  
Ethyl Acetate ◽  
Extraction Method ◽  
Stem Borer ◽  
Wild Plants ◽  
Linalyl Acetate ◽  
White Rice ◽  
Chinese Water ◽  
Citronellyl Acetate ◽  
Rice Stem Borer ◽  
Water Chestnut

Purun tikus (Eleocharis dulcis) are wild plants found on swamp land which are quite abundant in South Kalimantan. This research was conducted to find out the most active extract from Chinese water chestnut as an attractant of white rice stem borer (Scirpophaga innotata). Purun tikus were made into extracts using the stepwise extraction method using n-hexane, ethyl acetate, and methanol, with yields of 0.74%, 0.81%, and 7.58%, respectively. The results of the attractant test on purun tikus extract showed that the extract of n-hexane purun tikus was the most active extract as an attractant in white rice stem borer (Scirpophaga innotata). The results of the analysis using GC-MS showed that the extract of n-hexane purun tikus contained several compounds, namely 2-methyltetrahydrofuran, isopulegol, citronellal, citronellyl acetate, βcitronellol, Z-citral, 1-bromo-3,7-dimethyl-2,6-octadiene, citral, linalyl acetate, trans-caryophyllen, trans-phytol, verticellol.

scholarly journals Kerusakan Lima Varietas Padi Akibat Serangan Hama Penggerek Batang di Desa Savanajaya, Kecamatan Waeapo, Kabupaten Buru

2020 ◽  
Vol 16 (2) ◽  
pp. 180-186
Author(s):  
Muhamad F Umakamea ◽  
John A Patty ◽  
Ria Y Rumthe
Keyword(s):  
Yield Loss ◽  
Insect Pests ◽  
Population Data ◽  
Stem Borer ◽  
Survey Method ◽  
Rice Varieties ◽  
Larval Population ◽  
White Rice ◽  
Rice Productivity ◽  
Rice Stem Borer

 One of the obstacles in efforts to increase rice productivity is the damage caused by the attack of the rice stem borer. Annual yield loss caused this insect pests is quite high, reaching 10-30%. The attack of stem borer has long been encountered and is a problem in rice producing areas on Buru Island, such as in Savanajaya Village. This study aimed to obtain data on the types of pests, population levels and the intensity of damage in five rice varieties due to stem borer attact and to determine the varieties that had the lowest population and damage intensity in the Saavanajaya Village, Waeapo District, Buru Regency. The method used was a survey method that focused on five varieties of rice cultivated by farmers, to obtain population data and the intensity of damage. The results showed that the type of pest that attacked the five rice varieties of IR-64 variety in Savanajaya Village was the white rice stem borer (Scirpophaga innotata), with the highest larval population (per cluster) of 1.27 individuals and the intensity of damage 5.20%, followed by Cigeulis variety with a larval population of 1.17 individuals and damage intensity of 4.70%, the Ciherang variety with a larval population of 1.07 individuals and damage intensity of was 4.25%, the Mekongan variety with a larval population of 1.1 individuals and damage intensity of 4.15%, and the lowest was the Membramo variety with a larval population of 1.03 larvae and damage intensity of 4.12%. The damage intensity of at the study site, although different between varieties, could all be classified into the category of mild attack. Keywords: damage intensity, rice varieties, Savanajaya, stem borer   ABSTRAK Salah satu kendala dalam upaya peningkatan produktivitas padi adalah kerusakan yang disebabkan oleh serangan penggerek batang padi. Kehilangan hasil setiap tahun yang disebabkan oleh serangga hama ini padi cukup tinggi, bisa mencapai 10-30%. Serangan hama penggerek batang telah lama ditemui dan menjadi masalah di daerah produsen padi di Pulau Buru, seperti di Desa Savanajaya. Penelitian ini bertujuan untuk mendapatkan data jenis hama, jumlah populasi serta intensitas kerusakan pada lima varietas padi akibat serangan hama penggerek batang serta menentukan varietas yang memiliki populasi dan intensitas kerusakan terendah di Desa Savanajaya, Kecamatan Waeapo, Kabupaten Buru. Metode yang digunakan adalah survey yang difokuskan pada lima varietas padi yang diusahakan petani, untuk mendapatkan data populasi dan ntensitas kerusakan. Hasil penelitian menunjukkan bahwa jenis hama yang menyerang lima varietas padi varietas IR-64 di Desa Savanajaya adalah penggerek batang padi putih (Scirpophaga innotata), dengan populasi larva (per rumpun) tertinggi 1,27 ekor dan intensitas kerusakan 5.20%, diikuti oleh varietas Cigeulis dengan populasi larva 1,17 ekor dan internsitas kerusakan 4.70%, varietas Ciherang dengan populasi larva 1.07 ekor dan intensitas kerusakan 4.25%, varietas Mekongan dengan populasi larva 1.1 ekor dan intensitas kerusakan 4.15 %, dan yang terendah varietas Membramo dengan populasi larva 1.03 ekor dan intensitas kerusakan 4.12%. Intensitas kerusakan di lokasi penelitian, walaupun berbeda antar varietas tetapi semuanya dapat diklasifilasikan ke dalam kategori serangan ringan. Kata kunci: intensitas kerusakan, penggerek batang, Savanajaya, varietas padi,

Electron microscope study of the effects of radiation on insect fertility

1990 ◽  
Vol 48 (3) ◽  
pp. 72-73
Author(s):  
Judy Ju-Hu Chiang ◽  
Robert Kuo-Cheng Chen
Keyword(s):  
Electron Microscopy ◽  
Germ Cell ◽  
Germ Cells ◽  
Electron Microscope Study ◽  
Radiation Treatment ◽  
Light And Electron Microscopy ◽  
Stem Borer ◽  
Metabolic Energy ◽  
Rice Stem Borer ◽  
Effects Of Radiation

Germ cells from the rice stem borer Chilo suppresalis, were examined by light and electron microscopy. Damages to organelles within the germ cells were observed. The mitochondria, which provide the cell with metabolic energy, were seen to disintegrate within the germ cell. Lysosomes within the germ cell were also seen to disintegrate. The subsequent release of hydrolytic enzymesmay be responsible for the destruction of organelles within the germ cell. Insect spermatozoa were seen to lose the ability to move because of radiation treatment. Damage to the centrioles, one of which is in contact with the tail, may be involved in causing sperm immobility.

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