scholarly journals Study of Paddy Stem Borers Population Dynamics and Influencing Environmental Factors through Light Trap

2019 ◽  
pp. 1-10
Author(s):  
Mubashar Hussain ◽  
Muhammad Yasir Ali ◽  
Muhammad Umer ◽  
Numan Ejaz ◽  
Muhammad Bilal ◽  
...  
Keyword(s):  
Insect Pests ◽  
Light Trap ◽  
Weather Conditions ◽  
Stem Borer ◽  
Rice Crop ◽  
Stem Borers ◽  
Yellow Stem Borer ◽  
Insect Trap ◽  
Rice Stem Borers ◽  
Trap Catches

Rice crop is affected by many insect pests like White Stem Borer, Yellow Stem Borer and Pink Stem Borer. Rice stem borers are main pests affecting rice crop from nursery to physiological maturity including them in key pests. These studies had been carried out to discover the encouraging and antagonistic boundaries of weather parameters for the rice stem borers. As per result of studies, the population was recorded higher from mid-March to 1st week of May and then it escalated again from 2nd week of August to a maximum in September in case of Yellow Stem Borer (Scirpophaga incertulus) and White Stem Borer (Scirpophaga innotata) of rice during the both years 2017-2018; while in case of Pink Stem Borer population recorded from mid-September to the last week of April in 2017 and lasted till 4th week of May 2018. On evaluating the weather conditions specially temperature and relative humidity, it was detected that insect trap catches noted inside a certain range of temperature that varies from 18-35°C in case of White Stem Borer and 17-34°C for Yellow stem borer of rice. Extreme catches were documented in April and September inside a temperature range of 26-32°C considering it ideal series of temperature for insect light trap catches and activity of yellow and white stem borer. However, in case of pink stem borer above 32°C no catch was observed.

scholarly journals Population Dynamics of Rice Insect Pests through Light Trap Catches and Its Relation to Abiotic Factors in High Altitude Tribal Zone of Seethampeta in Andhra Pradesh, India

2021 ◽  
pp. 187-194
Author(s):  
P. Udayababu ◽  
P. Sowjanya ◽  
P. Jogarao
Keyword(s):  
Andhra Pradesh ◽  
Insect Pests ◽  
Gall Midge ◽  
Light Trap ◽  
Stem Borer ◽  
Maximum Temperature ◽  
Temperature Minimum ◽  
Yellow Stem Borer ◽  
Weather Parameters ◽  
Trap Catches

Studies were carried out at Agricultural Research Station, Seethampeta in Andhra Pradesh during the kharif season for three consecutive years starting from 2017 to 2019 on the population dynamics of insect pests occurring in paddy and also to assess the influence of weather parameters on insect pests. The insect pests observed in the light trap catches were, Yellow stem borer, Gall midge, Leaf folder, Green leafhopper, Plant hopper (BPH/WBPH) and Grasshoppers. The light trap catches of rice insect pests were recorded at weekly interval during 32nd Standard Meteorological Week (SMW) to 52nd Standard Meteorological Week (SMW) and the data were correlated with the weather parameters. The results revealed that more number of adults of Yellow stem borer were noticed during the year 2019 from 45th to 48th SMW and the correlation studies revealed that that maximum temperature, minimum and maximum relative humidities had significant positive influence and regression value of R2 (743, 638 and 726 during 2017, 2018 & 2019). The population of gall midge was negligible during the year 2017 and 2018. Whereas, in 2019 peak was notice during 38th SMW (15 No’s) maximum relative humidity has positive relation with increase in the gall midge population. Leaf folder adults were trapped more in the light traps during the year 2019 with peak catches of 11.00 No’s on 42nd SMW and were positively correlated with maximum temperature, minimum and maximum relative humidities. Similarly, leafhopper, brown leaf hopper, grass hoppers were positively correlated with the relative humidity.

scholarly journals Farmers’ Perceptions of Rice Production Constraints and Stem Borers Management Practices in Tanzania

2018 ◽  
Vol 10 (6) ◽  
pp. 57 ◽  
Author(s):  
Bonaventure January ◽  
Gration M. Rwegasira ◽  
Tadele Tefera
Keyword(s):  
Management Practices ◽  
Insect Pests ◽  
Group Discussion ◽  
Stem Borer ◽  
Rice Production ◽  
Stem Borers ◽  
Access To Credit ◽  
Cultural Methods ◽  
Rice Stem Borers ◽  
Rice Ecosystems

Rice farmers in Tanzania continue to experience losses due to stem borers. However, the information on farmers’ knowledge and perceptions of rice stem borers is limited and farmers’ efforts on managing this insect have been ineffective. The aim of this study was to investigate constraints affecting rice production and farmers’ approaches of stem borer management in irrigated low land rice ecosystems in Tanzania. Research method: A focus group discussion with farmers using a semi-structured questionnaire was used for data collection. The information collected included: farmers’ socio-economic profiles, farm characteristics, knowledge and perceptions of stem borers and their management practices.Farmers reported insect pests such as stem borers, white flies, leaf rollers and grasshoppers as major constraints of rice production. Other constraints reported were such as diseases, damage by birds, drought, weeds and lack of access to credit for purchasing inputs. Most of the farmers apply chemical insecticides against rice insect pests particularly stem-borers where number of health hazards have been reported. Very few farmers use cultural methods including crop residue disposal and split application of nitrogenous fertilizers for reduction of stem borer damages. The study revealed that, most farmers have limited knowledge on the recommended stem borer management practices and suggests that environmentally friendly pest management methods to be designed and implemented to minimize losses associated with rice stem borers.

scholarly journals Influence of abiotic factors on stem borer incidence and species distribution in rice (Oryza sativa L.)

2021 ◽  
Vol 42 (4(SI)) ◽  
pp. 1136-1133
Author(s):  
T. Sharmitha ◽  
◽  
C.G.L. Justin ◽  
S.S.J. Roseleen ◽  
◽  
...  
Keyword(s):  
Relative Humidity ◽  
Wind Velocity ◽  
Relative Abundance ◽  
Abiotic Factors ◽  
Light Trap ◽  
Stem Borer ◽  
Seasonal Incidence ◽  
Yellow Stem Borer ◽  
Rice Ecosystem ◽  
Trap Catches

Aim: To evaluate the effect of abiotic factors such as temperature, relative humidity, wind velocity, sunshine hours and rainfall on the distribution and relative abundance of stem borer species in rice ecosystem. Methodology: Seasonal incidence of stem borer species was monitored using light trap catches and were correlated with the weather parameters. The relative abundance of stem borer species during Kharif and Rabi was estimated based on light trap catches and larval incidence. Results: Seasonal incidence revealed the occurrence of three stem borer species (yellow stem borer, pink stem borer and dark headed borer) populations in rice ecosystem. Yellow stem borer was found to dominate in rice ecosystem during Kharif, (80.61%) whereas during Rabi, pinkstem borer was found to be dominant (72.60%) than yellow stem borer (21.92%) and dark headed borer (5.48%). Weather parameters such as temperature, rainfall and wind velocity negatively influenced the occurrence of stem borer species in rice, whereas relative humidity and sunshine hours had positive effect. Regression analysis revealed the increased effect of abiotic factors such as temperature, relative humidity and wind velocityon the population of pink stem borer against yellow stem borer and dark headed borer. Interpretation: The present study reveals that, the change in weather parameter during seasons, such as temperature (25 - 27°C), relative humidity (69 - 80 %) and wind velocity (3 - 4 km hr-1) increased the fitness of pink stem borer species population than yellow stem borer and dark headed borer species in rice ecosystem, which was evidenced by the occurrence and relative abundance of pink stem borer population during Kharif 2018 and Rabi 2019 respectively.

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 Design and Development of BRRI Solar Powered Light Trap

2021 ◽  
Vol 11 (2) ◽  
pp. 12-16
Author(s):  
Md Mizanur Rahman ◽  
◽  
Bidhan Chandra Nath ◽  
Subrato Paul ◽  
Md. Golam Kibria Bhuiyan ◽  
...  
Keyword(s):  
Low Cost ◽  
Light Trap ◽  
Ultra Violet ◽  
Stem Borer ◽  
Solar Panel ◽  
Solar Light ◽  
Yellow Stem Borer ◽  
Solar Intensity ◽  
Solar Powered ◽  
Main Component

This research intends to design, assemble and evaluate the performance of an eco-friendly solar light trap to reduce the insect population in rice fields as well as to minimize the use of harmful chemical pesticides. An AutoCAD drawing tool 2016 was used to sketch the design of solar light trap. The main component of this light trap was bulb, solar panel and battery. Design of solar panel and battery was done considering by 5W LED bulb. A total of five bulbs with different colors were selected to test the insect’s reaction by visible light. Study indicated that ultra violet-blue bulb showed the best performance compare to others based on the high percentage of insect trap (31.22%). A 20-watt solar panel and two 4.5 ah batteries of 6 volts were used to operate the solar light trap. The current, voltage, solar intensity was recorded to check overall performance of solar panel. The solar panel generated more power in April than May due to higher solar radiation in the study area. Study suggested that only 4.26 sunshine hours were required to full charge the battery. The solar light trap was operated 5.5 hour in night which was sufficient to reduce the insects in rice field. Moreover, the light sensor was showed 100% functional for ON/OFF purposes. The dominant insects like yellow stem borer (YSB), green leafhopper (GLH) were mostly observed. The average largest numbers of YSB and GLH were 900 and 600 respectively. In conclusion, the solar light trap is eco-friendly, low cost, easy and self-sufficient in term of solar energy. Finally, the newly developed light trap could be helpful for manufactures, decision makers, and engineering community as well as farmers as a best tool to protect nature in comparison to other pesticide using practices.

Studies in the effect of weather conditions on the activity and abundance of insect populations

1961 ◽  
Vol 244 (713) ◽  
pp. 331-378 ◽  
Keyword(s):  
Light Trap ◽  
Population Level ◽  
Weather Conditions ◽  
Logarithmic Scale ◽  
Scottish Highlands ◽  
Activity Effect ◽  
The Family ◽  
Insect Populations ◽  
South East England ◽  
Trap Catches

This paper is a statistical analysis of captures of insects every night for over 4 years in traps in a locality in the Scottish Highlands. It should be considered in relation to a similar account of work in south-east England (Williams 1951 a ). From the trap catches (on a logarithmic scale), and meteorological records taken alongside the traps, statistical analyses, chiefly by multiple regressions, were made to show (1) the relation between day to day changes in log catch and corresponding changes in temperature and wind, and (2) the relation between changes in mean log catch in the same month in different years and changes in rainfall and temperature in the three previous months. The former is an activity effect, and the latter a population effect. Details are given for total Diptera, for the bloodsucking flies of the family Simuliidae, and for total Lepidoptera in a light trap, and for total Diptera in a suction trap, this latter for activity only. The results show quantitatively the very high dependance, more so in some groups and at certain seasons, of the activity of insects on the current weather conditions, and of the population level on the previous weather. A fuller summary is included in the paper, pp. 367 to 369.

scholarly journals Relative abundance of stem borer species and natural enemies in rice ecosystem at Madhupur, Tangail, Bangladesh

2016 ◽  
Vol 12 (2) ◽  
pp. 267-272 ◽  
Author(s):  
MM Rahaman ◽  
KS Islam ◽  
M Jahan ◽  
MAA Mamun
Keyword(s):  
Relative Abundance ◽  
Natural Enemies ◽  
Wolf Spider ◽  
Stem Borer ◽  
Carabid Beetle ◽  
Growth Stages ◽  
Stem Borers ◽  
Ladybird Beetle ◽  
Yellow Stem Borer ◽  
Mirid Bug

The relative abundance of different stem borer species and their natural enemies with interaction effects were studied at three growth stages of irrigated Boro rice at Madhupur under the district of Tangail, Bangladesh during January to April, 2013. Five stem borer species viz; Yellow stem borer (Scirpophaga incertulas), Pink stem borer (Sesamia inferens), Dark headed stem borer (Chilo polyhcrysus), Stripped stem borer (Chilo suppressalis), White stem borer (Scirpophaga innotata), and nine different natural enemies were collected from the rice fields and recorded. The population of stem borers and natural enemies was highest in tillering stage and lowest in seedling stage. The relative abundance of stem borer species under investigation showed ranking order; yellow stem borer >dark headed stem borer>pink borer>white borer>stripped stem borer and natural enemies as ladybird beetle >long jawed spider>wolf spider>damselfly>carabid beetle>green mirid bug>lynx spider>dragon fly>ear wig. Populations of all five stem borers were positively correlated with ladybird beetle, wolf spider, long jawed spider, lynx spider, damsel fly, dragon fly, green mirid bug and negatively correlated with carabid beetle and earwig.J. Bangladesh Agril. Univ. 12(2): 267-272, December 2014

scholarly journals Screening for Sarawak Paddy Landraces with Resistance to Yellow Rice Stem Borer, Scirpophaga incertulas (Walker) (Lepidoptera: Crambidae)

2020 ◽  
Vol 43 (4) ◽  
Author(s):  
Alvin Xian Rong Ling ◽  
Freddy Kuok San Yeo ◽  
Nur Najwa Hamsein ◽  
Hieng Ming Ting ◽  
Mogeret Sidi ◽  
...  
Keyword(s):  
Leaf Surface ◽  
Stem Borer ◽  
Paddy Fields ◽  
Egg Mass ◽  
Resistance Screening ◽  
Stem Borers ◽  
Scirpophaga Incertulas ◽  
Rice Stem Borer ◽  
Rice Stem Borers ◽  
Abaxial Leaf Surface

The yellow rice stem borer, Scirpophaga incertulas (Walker) is a prevalent pest in paddy fields worldwide. In Sarawak, a survey on pest of paddy carried out from 2009 to 2011 covering 166 paddy fields revealed that rice stem borers caused 11.4% of total paddy damage. In order to reduce the damage, identifying resistance paddy variety is crucial. The objective of this study was to screen Sarawak paddy landraces with resistance to S. incertulas. Twelve Sarawak paddy landraces were selected randomly for this study. Antixenosis resistance screening was performed in aquariums (60 x 28 x 33 cm). Three replications of one-month-old seedlings were randomly arranged in aquarium and exposed to adult S. incertulas. The number and position of egg mass on each plant were recorded. Egg mass abnormalities were also observed. For antibiosis, rice culms of two-month old seedlings from each landrace were infested with larvae. The length of surviving larvae from five rice culms was measured. The experiment revealed variations in landrace of preference for ovipositing. Among the twelve Sarawak paddy landraces, Kanowit was more preferred by S. incertulas for ovipositing in comparison to other paddy landraces suggesting susceptibility towards the pest. Abaxial leaf surface was the preferred oviposition site. There was no clear antibiosis response of the paddy landraces towards S. incertulas larvae in this study.

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