scholarly journals Stem borer, Rupela albinella (Cramer), and stem rot, Sclerotium oryzae, in southwestern Colombia rice field.

1969 ◽  
Vol 78 (1-2) ◽  
pp. 17-22
Author(s):  
Alberto Pantoja ◽  
Julián Matta ◽  
Fernando Correa
Keyword(s):  
Fungal Infection ◽  
Rice Field ◽  
Stem Borer ◽  
Rice Fields ◽  
Plant Age ◽  
Stem Rot ◽  
Insect Larvae ◽  
Rice Stem Borer ◽  
Valle Del Cauca ◽  
The Relationship

The relationship between a rice stem borer Rupela albinella and stem rot, Sclerotium oryzae, was studied in commercial rice fields in the Valle del Cauca Department of Colombia. The insect larvae and their damage were found to be associated with stem rot, but the fungal infection was not dependent on the insect's presence. The number of R. albinella larvae, the wounds caused by them, and stems with fungal infection increased with plant age.

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 Pemanfaatan Refugia Dalam Meningkatkan Produksi Tanaman Padi Berbasis Kearifan Lokal

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Icuk Muhammad Sakir ◽  
Desinta Desinta
Keyword(s):  
Natural Enemies ◽  
Rice Field ◽  
Insect Pest ◽  
Stem Borer ◽  
Rice Production ◽  
Rice Grain ◽  
Leaf Roller ◽  
Nymphula Depunctalis ◽  
Rice Stem Borer ◽  
Rice Pest

Sakir et al, 2018. Utilization of Refugia in Increasing Rice Production Based on Local Wisdom. JLSO 7(1): The use of refugia as a habitat for natural enemies of rice pest organisms has not been widely used by farmers on an ongoing basis in preserving the environment.  Therefore, this research aimed to observe  the effect of utilizing refugia on rice production. Based on observations for 18 weeks in 3 hectares rice field, field with refugia harbored an abundance of natural enemies or predators including dome beetles (Micraspis sp.), Tomcat (Paederus littoralis), needle dragonflies (Zygoptera sp), praying grasshoppers (Stagmomantis carolina), spiders hunters (Oxyopes javanus), nets making spider (Tetragnatha maxillosa), and wasps (Polistes sp.). Insect pest infestations of white pest/leaf roller (Nymphula depunctalis), fake white pest/leaf folding (Cnaphlacorosis medinalis), white rice stem borer (Tryporyza innotata), and walang sangit (Leptocorisa acuta) was low. The rice field with plant refugia in 2018 produced 8.13 tons compared to 5.4 tons of rice grain/ha of the preceding year (2017) of yield without refugia. Plant refugia can be applied to increase swamp rice yield.

scholarly journals Incidence and relative abundance of rice stem borers in three selected rice fields in Lagos and Ogun States, Nigeria

Bio-Research ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 1258-1269
Author(s):  
Bolajoko Bolarinwa Adewoye ◽  
Joseph Chuks Anikwe ◽  
Winifred Ayinke Makanjuola
Keyword(s):  
Upland Rice ◽  
Insect Pest ◽  
Stem Borer ◽  
Rice Fields ◽  
Stem Borers ◽  
Mangrove Swamp ◽  
Rice Stem Borer ◽  
Rice Stem Borers ◽  
Significant Difference ◽  
Rainfed Lowland

This study was conducted to investigate the incidence of rice stem borer infestations and the species composition present in the selected rice fields. Data were collected between April 2017 and November 2018 across three locations, which include the upland rice field in Agbajege, Ogun state, rainfed lowland in Itoikin and Mangrove swamp in Igbogun, Lagos state, respectively. The incidence of rice stem borers was indicated by dead heart and white heads symptoms, while tillers were excised for rice stem borer identification and population. Results showed a high and low incidence of rice stem borers with no significant difference(p>0.05) at p= 0.29 and 0.37 between the early and late planting seasons in the rainfed lowland and upland rice fields respectively. Planting seasons were significant in the incidence of rice stem borers in mangrove swamp rice fields at p<0.05, p=0.01). This study showed that the predominant species of rice stem borers present in the three study sites were Chilo zacconius and Sesamia calamistis. C. zacconius was the most abundant species at 89% while S. calamistis was 11%. Rice stem borer populations were significantly higher at (p<0.05, p=0.000) in flooded zones while the highest rice stem borer populations were observed at the reproductive phase of the rice plants. Thisstudy showed that the planting seasons coincided with the peak period of the development of rice stem borers. Hence, conservation of natural enemies, monitoring and surveillance should be adopted in insect pest management in rice agroecosystems

scholarly journals KETIDAKBERDAYAAN PEMILIK SAWAH DAN KETIDAKADILAN TERHADAP MEREKA: Kasus Penanaman Tembakau di Klaten

Populasi ◽  
2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Faturochman Faturochman ◽  
Bimo Walgito
Keyword(s):  
Public Policy ◽  
Rice Field ◽  
Vantage Point ◽  
Point Of View ◽  
Rice Fields ◽  
The Government ◽  
The Relationship ◽  
Or History

Owners of rice fields in this research express their powerlessness/helplessness when their property is used by another party. This is so because right from the very beginning the government has been treating them unfairly. Such injustice/unfairness is manifested in the procedure, distribution, and the relationship between rice field owners and the government, especially PTPN. From the perspective of procedure, injustice arises from denying rice field owners the opportunity to become actively involved in the cooperation arrangement with the user of their fields (PTPN). From the perspective of distribution, the income of when the rice fields are operated by PTPN is generally lower than that obtained when the field owners operate them. From the vantage point of relationship, the feeling of injustice arises from the existence of a large social gap between the two parties. This research has emphasized on the farmers’ point of view. Nonetheless, results from other studies conducted in the same area, whether on the underlying public policy or history, came up with similar conclusions.

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.

Double ryanodine receptor mutations confer higher diamide resistance in rice stem borer, Chilo suppressalis

2021 ◽  
Author(s):  
Jing‐Mei Huang ◽  
Hao Sun ◽  
Lin‐Feng He ◽  
Chong Liu ◽  
Wen‐Chao Ge ◽  
...  
Keyword(s):  
Ryanodine Receptor ◽  
Stem Borer ◽  
Chilo Suppressalis ◽  
Rice Stem Borer
Sign in / Sign up

Export Citation Format

Share Document