New record of Aulacophora foveicollis on Clerodendrumindicum (L.) Kuntze from North East India

2016 ◽  
Vol 50 (6) ◽  
Author(s):  
Shimantini Borkataki ◽  
Purnima Das ◽  
I. C. Boruah ◽  
Abhijit Sharma
Keyword(s):  
Population Density ◽  
Significant Negative Correlation ◽  
Climatic Conditions ◽  
Maximum Temperature ◽  
Regression Equations ◽  
Seasonal Incidence ◽  
Correlation Studies ◽  
North East India ◽  
North East ◽  
Aulacophora Foveicollis

Aulacophora foveicollis, a polyphagous pest of more than 81 plant species is known for its voracious feeding habit. Studies on occurrence and population density of this pest were carried out under field conditions at Assam Agricultural University, Jorhat. Correlation studies revealed that population density of A. foveicollis showed significant negative correlation with maximum temperature and significant positive correlation with evening relative humidity. Multiple regression equations were developed for A. foveicollis to predict their seasonal incidence under the agro climatic conditions of Jorhat.

Seasonal Incidence of Major Sternorrhynchan Insect Pests Infesting Arecanut In South India

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Vinod Kumar Dubey ◽  
C.M. Kalleshwaraswamy ◽  
B.K. Shivanna
Keyword(s):  
South India ◽  
Field Experiments ◽  
Insect Pests ◽  
Transitional Zone ◽  
Maximum Temperature ◽  
Seasonal Incidence ◽  
Correlation Studies ◽  
Pseudococcus Longispinus ◽  
Sunshine Hours ◽  
Chrysomphalus Aonidum

Field experiments were conducted during 2019-20 to know the seasonal incidence of three species of sternorrhynchan insect pests infesting in arecanut viz., whitefly, Aleurocanthus arecae, armoured scale, Chrysomphalus aonidum and mealybug, Pseudococcus longispinus in two different locations under southern transitional zone. The study revealed that, all the three species infesting arecanut were active throughout the year. Correlation studies of whiteflies showed that, rainfall was significantly positively correlated and maximum temperature and sunshine hours were significantly negatively correlated. For armoured scales, non-significant positive correlation with minimum temperature and for the mealybug resulted that the maximum temperature was significantly positively correlated whereas the relative humidity was significantly negatively correlated.

scholarly journals Analysis of rainfall and temperature trends of selected stations over North East India during last century

MAUSAM ◽  
2021 ◽  
Vol 65 (4) ◽  
pp. 497-508
Author(s):  
S.I. LASKAR ◽  
S.D. KOTAL ◽  
S.K.ROY BHOWMIK
Keyword(s):  
Monsoon Season ◽  
Maximum Temperature ◽  
Rainfall Time Series ◽  
North East India ◽  
Post Monsoon ◽  
North East ◽  
The North ◽  
Increasing Trend ◽  
Post Monsoon Season ◽  
Increasing Trends

In this study, the trends of seasonal maximum and minimum temperatures and rainfall time series were investigated for 9 selected stations in the north eastern India with the available data stretching between the years 1913-2012.During the period under study the minimum temperature has increasing trends in almost all the stations of north east India except Cherrapunji where it shows decreasing trend in all the season of the year. In case of maximum temperature Cherrapunji, Guwahati and Imphal show increasing trends during all the seasons. Agartala and Shillong show increasing trend of maximum temperature during monsoon and post monsoon season. Dibrugarh and Pasighat show decreasing trend during pre monsoon season and increasing trend during all other seasons of the year. Gangtok shows decreasing trend of maximum temperature during all the seasons where as Silchar shows no trend in maximum temperature.Out of all the selected nine stations, most of the stations show either decreasing trend or no trend of rainfall except Guwahati which shows significant increasing trend of rainfall during post monsoon season.

scholarly journals Historical and Temporal Trends of Climatic Parameters in North East India

2017 ◽  
Vol 19 (4) ◽  
pp. 547-561 ◽  
Keyword(s):  
Meteorological Data ◽  
Temporal Trends ◽  
Maximum Temperature ◽  
Local Climate ◽  
Water Resources Systems ◽  
North East India ◽  
North East ◽  
Mk Test ◽  
Ne India ◽  
Increasing Trends

Accessing temporal trend of different meteorological parameters is essential for understanding the local climate changing pattern of a region. Quantitative estimates of the effect of climate change helps in understanding, planning, and management of water resources systems. In this study, monthly meteorological data were collected from 30 stations of north-east (NE) India for 1971–2010 and non-parametric Mann-Kendall (MK) test and Sen slope were employed for detection and quantification of significant temporal trends, respectively. An ESRI ArcGIS toolbar “ArcTrends” was used for the above mentioned tasks. The results obtained for rainfall were of mixed nature and both increasing and decreasing significant trends were found for different stations in different months. Most of the negative trends were found in the months of July–August (monsoon), whereas, more stations showed positive trends in April–May (pre-monsoon), and October–November (post-monsoon), indicating inter-seasonal shifting of rainfall without much change in the annual total. Number of rainy days was found to have positive trends in March–May (pre-monsoon) and negative trends in September–December. Except some positive trends during June–December in Manipur and Meghalaya, there were no significant trends in maximum temperature. In some stations, minimum temperature was found to have significant increasing trends throughout the year indicating a general rising trend in NE India. Some major towns like Guwahati, Imphal, Agartala and Kailashshahar showed significant positive trends in mean temperature, mostly during June–December. Mean relative humidity was, in general, found to be significantly increasing, especially during February–March. In some stations, wind speed was found to have significant negative trends throughout the year, with Agartala being the most affected.

SEASONAL INCIDENCE OF PLUME MOTH, EXELASTIS ATOMOSA (LEPIDOPTERA: PTEROPHORIDAE) ON LONG DURATION PIGEONPEA, CAJANUS CAJAN

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
RAHUL KUMAR RAWAT ◽  
RAM KEVAL ◽  
SABUJ GANGULY ◽  
SNEHEL CHAKRAVARTY
Keyword(s):  
Abiotic Factors ◽  
Insect Pest ◽  
Peak Level ◽  
Significant Negative Correlation ◽  
Weather Variables ◽  
Pest Population ◽  
Seasonal Incidence ◽  
Correlation Studies ◽  
Long Duration ◽  
Average Relative Humidity

The present research was aimed to study the incidence pattern of plume moth, Exelastis atomosa during Kharif 2015-16 and 2016-17 for long duration on pigeonpea cv. Bahar. The results revealed that the incidence of pod bug started from the 5th standard week during 2015-16 and from 6th standard week during 2016-17 and it remained active up to 15thstandard week of both the years. The E. atomosa population attained its peak level during 11th standard week of both the years i.e., 1.73 larvae/ plant and 1.6 larvae/ plant respectively. Correlation studies indicated that population of E. atomosa exhibited a significant positive correlation with maximum and minimum temperatures and wind velocity whereas a significant negative correlation was established with average relative humidity. Other abiotic factors had no significant effect on this insect pest population. The regression equation revealed that variations of different weather variables caused approximately 85.3 and 75.9 per cent variations in E. atomosa population during both years, respectively.

↵​​Transboundary Animal Diseases in the Perspective of North East India: A Review

2021 ◽  
Author(s):  
Sanjeev Kumar ◽  
T.K. Dutta ◽  
P. Roychoudhury
Keyword(s):  
African Swine Fever ◽  
Climatic Conditions ◽  
Arunachal Pradesh ◽  
North East India ◽  
Animal Diseases ◽  
North East ◽  
International Borders ◽  
Current Review ◽  
Natural Beauty ◽  
Geographical Locations

Transboundary animal diseases (TADs) are a serious threat to food security and human health. North-East India shares international borders with five countries that include China, Bangladesh, Myanmar, Nepal and Bhutan. Geographical locations and climatic conditions of North East India with respect to other parts of India are different. Although this part of the country is well known for its natural beauty, customs and unique cultures but the porous international borders made it highly prone to TADs. The porcine reproductive and respiratory syndrome (PRRS) in pigs is believed to be entered in Mizoram, India from Myanmar. The recent outbreaks of African swine fever (ASF) in India are also initiated in Arunachal Pradesh and Assam and originated from China. The vulnerability of this region to be a potential entry point for TADs, which might have potential zoonotic value, warrants a critical review of the border situation of NER India. The current review emphasizes on awareness about TADs and the factors responsible for their emergence.

Correlation studies for effect of fruit grade on fruit quality and seed traits of mandarin variants in North East India

2015 ◽  
Vol 72 (2) ◽  
pp. 162
Author(s):  
Ashok Kumar ◽  
R.K. Avasthe ◽  
Brijesh Pandey ◽  
Boniface Lepcha ◽  
H. Rahman
Keyword(s):  
Fruit Quality ◽  
Seed Traits ◽  
Correlation Studies ◽  
North East India ◽  
North East

A combination of two species fish culture with Labeo gonius (Hamilton, 1822) and Cyprinus carpio Linnaeus, 1758 under mid-hill condition in Meghalaya, North-east India

2021 ◽  
Vol 68 (1) ◽  
Author(s):  
S. K. Das ◽  
S. G. Singh ◽  
P. Mahanta ◽  
A. Das ◽  
N. P. Devi
Keyword(s):  
Cyprinus Carpio ◽  
Climatic Conditions ◽  
Fish Culture ◽  
Fish Production ◽  
Lower Altitude ◽  
North East India ◽  
Growing Period ◽  
North East ◽  
Hill Region ◽  
One Year

One of the major issues in promoting aquaculture in mid altitude region is the dearth of suitable fish species for enhancing fish production. The prevailing cold climatic conditions in the state of Meghalaya restricts the fish growing period to about 7-8 months in a year. The six species composite fish culture as commonly practiced in the lower altitude warmer region do not always perform well in mid altitude region. Therefore, a study was undertaken to evaluate a two species fish culture system with Labeo gonius (Hamilton, 1822) and Cyprinus carpio Linnaeus, 1758, for enhancing fish production from the mid-hill region. The paper highlights the performance of the two species in small ponds over a period of one year. The specific growth rate (SGR) ranged from 0.248 to 1.038 g day-1 and 0.520 to 1.831 g day-1 for L. gonius and C. carpio respectively. The combination yielded an average fish production of 2,550 kg ha-1 year-1.

scholarly journals Survival of Wild Adults ofCeratitis capitata(Wiedemann) under Natural Winter Conditions in North East Spain

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
E. Peñarrubia-María ◽  
J. Avilla ◽  
L. A. Escudero-Colomar
Keyword(s):  
Winter Season ◽  
Fruit Fly ◽  
Adult Mortality ◽  
Climatic Conditions ◽  
Maximum Temperature ◽  
Daily Minimum Temperature ◽  
Daily Maximum Temperature ◽  
Daily Maximum ◽  
North East ◽  
Winter Conditions

The overwintering of the Mediterranean fruit fly (medfly),Ceratitis capitata(Wiedemann) at the northern limits of its geographic distribution is not yet well known. With the aim of estimating the survival rate of medfly adults in northeast Spain under natural winter conditions, a two-winter-season trial was carried out. A control was carried out in a climatic chamber at 25°C. The results showed that medfly adults were unable to survive the entire winter season in the Girona area. Climatic conditions, including the daily minimum temperature, daily maximum temperature and the high rainfall, appeared to be involved in adult mortality in winter.

scholarly journals Organic Pineapple Production Technology in Tripura – The lone AEZ for Fruits in North East India

2021 ◽  
Vol 14 (2) ◽  
Author(s):  
Utpal Das
Keyword(s):  
Climatic Conditions ◽  
Export Market ◽  
Ananas Comosus ◽  
Annual Rainfall ◽  
Small Scale ◽  
Humid Climate ◽  
North East India ◽  
Positive Effects ◽  
North East ◽  
Organic Cultivation

Tripura is a land of high hills, hillocks, interspersed with rivers and valleys having moderately warm and humid climate, well distributed annual rainfall of 2500 mm. The terrain soil and climate of Tripura are ideally suited for rain-fed Horticulture. Tripura, being endowed with fertile soils, abundant moisture and sub-tropical climate offer immense scope for production of a wide variety of tropical and sub-tropical fruits. The climatic conditions of the state suitable for production of a large variety of horticultural crops chief among which include ‘Queen’ and ‘Kew’; varieties of Pineapple. Pineapple (Ananas comosus L.) is a monoecious, monocotyledonous, monocarpic and xerophytic herbaceous perennial plant and its perennial in nature is propitiated through suckers. ‘Queen’ and ‘Kew’ (‘Smooth Cayenne’) are the main cultivars grown in different parts of Tripura. Among the states of north east India Assam is leading in terms of area and production and Tripura is just behind the Assam both in terms of area and production. Tripura produces 178.45 thousand MT from 12.57 thousand ha area (Anonymous, 2017), which is India’s fifth leading state of in pineapple production and Tripura is also share 9.30 per cent of India’s total pineapple production. The variety ‘Queen’ being the most popular for fresh consumption and occupying the largest area. These varieties are well known in the rest of the country. These Fruit products are free of any chemical residue thus making the fruits of Tripura products of organic farming. Pineapple production for export market is a realistic for organic cultivation for small scale organic farmers. The positive effects of organic pineapple production by default in Tripura competing on the global export market for pineapple.

scholarly journals Seasonal Incidence and Effect of Abiotic Factors on Population Dynamics of Sucking Insect Pest Complex of Groundnut

2021 ◽  
pp. 10-17
Author(s):  
K. Shamili Dhatri ◽  
M. S. V. Chalam ◽  
A. Rajesh ◽  
B. Ramana Murthy ◽  
N. C. Venkateswartlu
Keyword(s):  
Negative Correlation ◽  
Minimum Temperature ◽  
Significant Positive Correlation ◽  
Insect Pests ◽  
Abiotic Factors ◽  
Insect Pest ◽  
Significant Negative Correlation ◽  
Maximum Temperature ◽  
Seasonal Incidence ◽  
Positive Correlation

Studies on seasonal incidence of sucking insect pests carried out with three dates of sowing viz., early (July 15th), normal (July 30th) and late (August 15th) revealed that the incidence of leafhoppers, aphids and thrips started from 5 to 14 DAS (days after sowing) and continued till harvesting. In early sown crop, the incidence of leafhoppers started from 31 SW and incidence of aphids and thrips started from 30 SW and continued up to 42 and 43 SW for leafhoppers and aphids, respectively and 41 SW for thrips. In normal sown crop, incidence of leafhoppers and aphids started from 32 SW and incidence of thrips started from 31 SW and continued till the end of 45 SW for all the three pests. In late sown crop, the incidence of leafhoppers started from 35 SW and incidence of aphids and thrips started from 34 SW and continued up to 46 and 47 SW for leafhoppers and aphids, respectively and 46 SW for thrips. Correlation studies revealed that incidence of leafhoppers exhibited significant negative correlation with maximum temperature (r = -0.467, -0.442 and -0.464) and rainfall (r = -0.518, -0.529 and -0.742) during all the three dates of sowing (early, normal and late, respectively) and significant negative correlation with minimum temperature in late sown crop (r = -0.448). Aphids exhibited significant negative correlation with maximum temperature (r = -0.469, -0.521 and -0.472) and rainfall (r = -0.443, -0.450 and  -0.721) in all the three dates of sowing (early, normal and late, respectively) while significant negative correlation with minimum temperature in early and late sown crop with r values -0.519 and -0.324.  Thrips exhibited significant positive correlation with maximum temperature (r = 0.522, 0.459 and 0.447), significant negative correlation with rainfall (r = -0.458, -0.465 and -0.451) during three dates of sowing (early, normal and late, respectively) while significant negative correlation with relative humidity in early sown crop (r = -0.616) and significant positive correlation with minimum temperature in early sown crop (r = 0.463).

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