scholarly journals Effect of planting dates on stem borer incidence and its natural enemies in relation to weather variables in rice ecosystem

2020 ◽  
Vol 8 (5) ◽  
pp. 1423-1427
Author(s):  
M Baruah ◽  
BC Dutta
Keyword(s):  
Natural Enemies ◽  
Stem Borer ◽  
Weather Variables ◽  
Planting Dates ◽  
Rice Ecosystem

scholarly journals ANALISIS KORELASI DAN REGRESI DINAMIKA POPULASI HAMA DAN MUSUH ALAMI PADA BEBERAPA VARIETAS UNGGUL PADI SETELAH PENERAPAN PHT DI KABUPATEN BONE PROVINSI SULAWESI SELATAN

2015 ◽  
Vol 22 (1) ◽  
pp. 29
Author(s):  
Asriyanti Ilyas
Keyword(s):  
Regression Analysis ◽  
Natural Enemies ◽  
Stem Borer ◽  
Nilaparvata Lugens ◽  
Rice Varieties ◽  
Correlation And Regression Analysis ◽  
Arthropod Predators ◽  
Positive Correlation Coefficient ◽  
Rice Ecosystem ◽  
High Degree

<div data-canvas-width="788.5133333333328">Different types of rice pests, have been reported. The explosions and a potential pests are Rice Stem Borer (Tryporiza</div><div data-canvas-width="802.6483333333334">sp.), Brown Planthoppers (Nilaparvata lugens), Green Leafhoppers (Nephotettix virescens), and Rats (Rattus sp.), wich</div><div data-canvas-width="802.7016666666667">an obstacle in creating stability of rice production in Bone. In rice ecosystem, natural enemies of arthropod predators</div><div data-canvas-width="802.703333333333">are most instrumental in suppressing the pest population. Fluctuation in population density of natural enemies, affecting</div><div data-canvas-width="802.6466666666668">pests presence. Efforts to suppress pest proportions through IPM, is a strategy of lowering the level of pests and damage</div><div data-canvas-width="802.6933333333333">to rice crops. This study aims to identify and measure the relationship strength between pests and natural enemies</div><div data-canvas-width="802.6733333333332">populations in some rice varieties after IPM, using correlation and regression analysis. Observations conducted in Bone,</div><div data-canvas-width="802.6600000000001">from May to August 2012, with 2 observed variables, pests and natural enemies populations in Inpari 6, Inpari 10, Inpari</div><div data-canvas-width="802.6633333333332">16, Ciherang, Cigelis, and Mekongga. Data analysis were performed using correlation and regression analysis. The</div><div data-canvas-width="802.6833333333332">results showed a high degree of correlation between pest and natural enemies (predators) populalions, characterized by</div><div data-canvas-width="802.7066666666666">a positive correlation coefficient (0.957) and significant at the level of 0.01, where each increase in the intensity of pest</div><div data-canvas-width="564.7166666666665">populations, will be followed by increase in the number of natural enemies captured.</div>

Natural parasitism of eggs of yellow stem borer, Scirpophaga incertulas Walker (Lepidoptera: Crambidae) in rice ecosystem at Tiruchirappalli, Tamil Nadu

ENTOMON ◽  
2020 ◽  
Vol 45 (3) ◽  
pp. 181-188
Author(s):  
T. Sharmitha ◽  
C. Gailce Leo Justin ◽  
S. Sheeba Joyce Roseleen ◽  
P. Yasodha
Keyword(s):  
Field Study ◽  
Tamil Nadu ◽  
Host Density ◽  
Stem Borer ◽  
Scirpophaga Incertulas ◽  
Egg Masses ◽  
Yellow Stem Borer ◽  
Rice Ecosystem ◽  
Natural Parasitism

Three species of parasitoids viz., Telenomus dignus Gahan, Trichogramma japonicum, Ishii and Tetrastichus schoenobii Ferriere were recorded from the egg masses of rice yellow stem borer, Scirpophaga incertulas (Walker) in a field study. The extent of parasitism was high during Rabi (43.33 – 93.33 %) and low during Kharif (0 - 40.00 %). Parasitism by T. dignus was maximum in October (50.00 %), T. japonicum, in November (23.08 %) and T. schoenobii in February (55.55 %). dignus and T. schoenobii in combination parasitized maximum number of egg masses (41.82 %). Multiple parasitism by the three species was high in December (8.33 %) and January (7.14%). Parasitic potential was maximum, when T. schoenobii alone parasitised the egg masses followed by T. dignus and T. schoenobii in combination. Host density in the field influenced the extent of parasitism.

Relative Safety of Insecticides in Combination with Neem against Natural Enemies in Rice Ecosystem

2021 ◽  
Vol 33 (1) ◽  
pp. 114-119
Author(s):  
Shubhasree Dash ◽  
Sanjay Kumar Pradhan ◽  
Deepak Kumar Swain ◽  
Laxmi Narayan Mohapatra
Keyword(s):  
Natural Enemies ◽  
Relative Safety ◽  
Rice Ecosystem

Status of Insect Pests and Natural Enemies of Direct Seeded and Transplanted Rice

2017 ◽  
Vol 14 (4) ◽  
pp. 11-29
Author(s):  
K N Ashrith
Keyword(s):  
Natural Enemies ◽  
Insect Pests ◽  
Stem Borer ◽  
Cnaphalocrocis Medinalis ◽  
Green Leafhopper ◽  
Yellow Stem Borer ◽  
Transplanted Rice ◽  
Rice Leaf Folder ◽  
The Status ◽  
Direct Seeded

Studies were conducted on the status of insect-pests and natural enemies of direct seeded rice (DSR) in comparison with puddled transplanted rice (PTR) during rabi and kharif in 2013-14. The rice leaf folder and yellow stem required both the seasons. Maximum leaf folder Cnaphalocrocis medinalis (Guenee) (13.03%) damage and yellow stem borer damage (13.49%) of white ears was recorded during last week of October and second week of November in DSR under unprotected situation respectively. While sucking pests population mainly green leafhopper incidence was comparatively high in PTR (3.29 and 4.92/hill) also plant hoppers incidence (BPH and WBPH) (28.90 and 18.44 adults/hill) under unprotected situation during two seasons respectively. Population of predators at both the season remained high throughout the study period in PTR than the DSR except

scholarly journals Lepidopteran Stem Borer Species Abundance and Associated Damages on Irrigated Kilombero Low Land Rice Ecosystem in Tanzania

2017 ◽  
Vol 15 (1) ◽  
pp. 28-35 ◽  
Author(s):  
Bonaventure January ◽  
Gration M. Rwegasi ◽  
Tadele Tefera
Keyword(s):  
Species Abundance ◽  
Stem Borer ◽  
Rice Ecosystem

scholarly journals Struktur Komunitas Hymenoptera Parasitoid Pada Berbagai Lanskap Pertanian Di Sumatra Barat

2016 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Yaherwandi Yaherwandi
Keyword(s):  
Biological Control ◽  
Species Richness ◽  
Natural Enemies ◽  
Landscape Structure ◽  
Complex Problem ◽  
Agricultural Ecosystem ◽  
Species Richness And Diversity ◽  
Ecosystem Diversity ◽  
Rice Ecosystem

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.

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