Population Dynamics of Insect Pests and its Natural Enemieson Grain Amaranthin Relation with Weather Parameters

The experiment was conducted to know the abundance of major insect pests on 15 mungbean varieties viz., BARI Mung-1, BARI Mung-2, BARI Mung-3, BARI Mung-4, BARI Mung-5, BARI Mung-6, BINA Moog-4, BINA Moog-5, BINA Moog-6, BINA Moog-7, BINA Moog-8, BU Mug-1, BU Mug-2, BU Mug-4 and Patuakhali local Mung and the role of weather parameters on the population mobility of insects at the farmer’s field of sadar upazila of Patuakhali district, Bangladesh during late Robi season 2016. Variety BARI Mung-4 had the lowest number of leaf folder while variety BARI Mung-6 had the highest number of leaf folder indicating higher susceptibility to leaf folder. Variety BARI Mung-4 had the lowest number of gram pod borer and BARI Mung- 6 had the highest abundance of gram pod borer followed by BINA Moog-7. Variety BINA Moog-4 had the lowest number of legume pod borer and BARI Mung-6 had the highest abundance of legume pod borer followed by BINA Moog-7. Population of leaf folder showed a negative correlation (R2= -0.020) with temperature. Similarly, gram pod borer (R2= -0.317) and legume pod borer (R2= -0.014) showed a negative correlation with temperature. In case of relative humidity, population of leaf folder (R2= -0.175) showed a negative correlation while gram pod borer showed a positive correlation (R2= 0.031) but legume pod borer (R2= -0.086) showed a negative correlation.

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Mutants and weather parameters affecting the population dynamics of three major insect pests of Mungbean

SAARC Journal of Agriculture ◽

10.3329/sja.v16i2.40254 ◽

2019 ◽

Vol 16 (2) ◽

pp. 1-12

Author(s):

MMH Khan ◽

MM Islam ◽

M Asaduzzaman ◽

MN Uddin

Keyword(s):

Population Dynamics ◽

Insect Pests ◽

Science And Technology ◽

Flea Beetle ◽

Average Temperature ◽

Pod Borer ◽

Weather Parameters ◽

Agricultural Farm ◽

Aphid Abundance

The study was conducted to know the abundance of aphid, flea beetle and pod borer on the mutants viz., MBM-07-Y-1, MBM-07-Y-2, MBM- 656-51-2, MBM-527-114, MBM-07-(S)-2, MBM-347-13, MBM-390-94-Y, MBM-427-87-3, MBM-80 (Local) and a variety BARI moog-6 and the role of weather parameters on the population dynamics of insects at the Agricultural Farm of Patuakhali Science and Technology University from April to June, 2015. Results revealed that the tested mutants did not show resistance against aphid, flea beetle and pod borer. Mutant MBM- 347-13 had the lowest number of flea beetle while mutant MBM-427-87- 3, MBM-80(LCAL) and MBM-527-114 had the highest number of flea beetle indicating higher susceptibility to flea beetle. Mutant MBM-390-94- Y had the lowest abundance of aphid while BARI moog-6 had highest aphid abundance. Mutant MBM-347-13 had lowest number of pod borer and MBM-427-87-3 had highest abundance of pod borer followed by MBM-07(S)-2 and BARI moog-6. Flea beetle abundance gradually increased with decreasing average temperature while aphid and pod borer abundance gradually increased with increasing average temperature. In case of humidity, flea beetle abundance increased very slightly with increasing average humidity but aphid abundance increased very slightly with increasing average humidity. Pod borer abundance was low with high average humidity and then increased slightly due to decrease of humidity and finally declined with increasing humidity. SAARC J. Agri., 16(2): 1-12 (2018)

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Studies on population dynamics of major pests of Ailanthus excelsa Roxb

Journal of Environmental Biology ◽

10.22438/jeb/42/4(si)/mrn-1554a ◽

2021 ◽

Vol 42 (4(SI)) ◽

pp. 1168-1173

Author(s):

V. Manimaran ◽

◽

M. Suganthy ◽

A. Balasubramanian ◽

P. Pretheepkumar ◽

...

Keyword(s):

Population Dynamics ◽

Insect Pests ◽

Seasonal Abundance ◽

Maximum Temperature ◽

Pest Population ◽

Peak Period ◽

Ailanthus Excelsa ◽

Major Pest ◽

Weather Parameters ◽

R Value

Aim: To study the peak period of incidence of major pest of Ailanthus excelsa. Methodology: Seasonal abundance of major insect pests of A. excelsa viz., ailanthus defoliator and ailanthus webworm were studied in 5-year-old plantation at Forest College and Research Institute, Mettupalayam from April, 2018 to March, 2019. Weekly observations were made on the abundance of major insect and pest population which were correlated with weekly weather parameters. Results: Monitoring the population dynamics of insect pests revealed that the major key pests were ailanthus defoliator and webworm. The highest number of ailanthus defoliator (38.00 larvae per tree) and webworm (33.90 larvae per tree) were recorded during 44th standard week in 5-year-old plantation. Correlation analysis revealed that maximum temperature (Tmax) was negatively correlated with ailanthus defoliator with the r value of -0.299. Regarding webworm, wind velocity and evaporation rate were negatively correlated with the r value of -0.412 and -0.361 and was found to be statistically significant at 1% level. Interpretation: Seasonal abundance of this information helps us to take decision for the management of A. excelsa pests.

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Population dynamics of important insect pests of soybean in relation to weather parameters

Indian Journal of Entomology ◽

10.5958/0974-8172.2019.00033.6 ◽

2019 ◽

Vol 81 (1) ◽

pp. 51

Author(s):

M. M. Sonkamble ◽

B. S. Rana

Keyword(s):

Population Dynamics ◽

Insect Pests ◽

Weather Parameters

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Seasonal Incidence of Pulse Aphid (Aphis craccivora Koch.) and its Natural Enemies on Field Pea (Pisum sativum L.) in Relation to Some Abiotic Factors in Alluvial Zone of West Bengal

Legume Research - An International Journal ◽

10.18805/lr-4464 ◽

2021 ◽

Author(s):

S. Pal ◽

S. Samanta ◽

A. Banerjee

Keyword(s):

Relative Humidity ◽

Pisum Sativum ◽

Natural Enemies ◽

West Bengal ◽

Insect Pests ◽

Field Pea ◽

Pest Population ◽

Pisum Sativum L ◽

Aphis Craccivora Koch ◽

Weather Parameters

Background: Field pea, Pisum sativum L. is an important winter-season pulse crop. It is subjected to damage by both field and storage insect pests and approximately 10-15 per cent reduction in yield was reported due to the infestation of different insect pests. Among these, pulse aphid (Aphis craccivora Koch.) affects plant physiology directly by removal of nutrients or indirectly by dispersal of various viral diseases. The present investigation has been aimed to study the seasonal fluctuations of aphids and their natural enemies as well as their correlation. Another objective was to know the effect of various weather parameters on pulse aphids and their natural enemies which ultimately would be helpful to develop a forewarning model.Methods: The field experiment was conducted at the A-B Block Farm of Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal using two varieties of field pea (KPMR 935 and IFPD 122) during rabi seasons of two consecutive years of 2017-18 and 2018-19 following a Randomized Block Design with three replications. After recording the total population of both pests (nymphs and adults) and their natural enemies across the season, the mean population was worked out and used for correlation and regression studies along with the weather parameters. Result: Maximum aphid population was noticed during the peak pod formation stage of the crop irrespective of the varieties. The pest population was very strongly correlated with the incidence of coccinellid and ant population in both test varieties. Among the weather parameters, both maximum and minimum temperature and sunshine hour showed a positive correlation with the pest population and their natural enemies but relative humidity and rainfall showed a negative correlation. Regression studies indicated that temperature and relative humidity were the most influencing factors over the incidence of aphid in both the seasons.

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Influence of sowing date and weather parameters on the relative abundance and damage of major insect-pests of wheat in North-Western plains of India

Agricultural Research Journal ◽

10.5958/2395-146x.2021.00114.9 ◽

2021 ◽

Vol 58 (5) ◽

pp. 801-807

Author(s):

Beant Singh ◽

Pritpal Singh

Keyword(s):

Relative Abundance ◽

Insect Pests ◽

Sowing Date ◽

Weather Parameters ◽

North Western

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Monitor surveying for migrant insect pests

Outlook on Agriculture ◽

10.1177/003072707300700305 ◽

1973 ◽

Vol 7 (3) ◽

pp. 109-116 ◽

Cited By ~ 26

Author(s):

L R Taylor

Keyword(s):

Population Dynamics ◽

Insect Pests ◽

Spatial Dimension ◽

Effective Control ◽

Crop Pests ◽

Insect Populations ◽

Insect Survey ◽

Local Assessment

Effective control of erratic crop pests requires accurate timing of treatments, and the dynamics of insect populations are inadequately understood. Aerial monitoring for many species simultaneously, instead of sampling each crop separately, enables the Rothamsted Insect Survey to provide accurate, quantitative, synoptic information on current levels of pest populations; this gives continuity to local assessment for advisory purposes, and adds a spatial dimension to population dynamics.

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