1N. Johnson Singh, 2Amitava Konar and 3Palash Mondal

Incidence of aphids in different traps on potato in Gangetic plains of West Bengal
...the end of February. The abiotic factors viz., temperature (maximum & minimum), relative humidity% (maximum & minimum) and bright sunshine hour had significant effect on aphid population. The same abiotic factors were quite different between the first and second year. This was due to the fact that the climatic conditions in second year varied distinctly from the first year.


1S. A. Khan and 2S. Jha

Effect of dates of sowing, moisture regimes, varieties and weather factors on incidences of aphid, Lipaphis erysimi (Kalt.) in rape and mustard
...fluenced by predisposing abiotic factors, has been widely reported as the most noxious insect pest limiting production of rape and mustard. Field experiment was carried out with 3 varieties of rape and mustard, 6 dates of sowing and 2 moisture regimes to understand aphid population dynamics during different phases of growth of rainfed vis-à-vis irrigated rape and mustard crops, and work out relationships between aphid population and weather parameters f...

S. Choudhury and S. Pal

Population dynamics of mustard aphid on different Brassica cultivars under terai agro-ecological conditions of West Bengal
...population and different abiotic factors revealed contradictory results. Except for a few instances the weather parameters showed low order of associations with aphid population. Thus, the ecological factors exhibited little impact on the population build up of mustard aphid. The degree of infestation and the rates of population change of the aphids on different Brassica cultivars seem to be governed by varietal characteristics of different germplasms. Brassic...
Erol Akkuzu1,*, Hidayet Güzel2 and Özkan Evcin1
...ify;">Various biotic and abiotic factors influence the population dynamics and severity of damage in a forest. This study investigated the effects of stand composition and site index of pine forests on Ips sexdentatus (Boerner) populations. Two main objectives of this study were a) to compare the effects of two different black pine stands of site index-I (high site productivity) and site index-III (low site productivity) and b) to compare the pure and m...
Farhan Ahmad1,*, Muhammad Waris Sanjrani1, Shah Nawaz Khuhro1, Asif Sajjad2, Abid Ali3, Rashad Rasool Khan3, Farooq Ahmed3 and Junhe Liu4,*

Muhammad Haroon Hullio1,4, Abdul Ghani Lanjar2, Abdul Rahman Dhuyo3, Imran Khattri4 and Agha Mushtaque Ahmed4* 

... booting) with effect of abiotic factors (temperature and relative humidity). In last, the varietal screening of 30 local rice varieties in term of pest population was observed. The data were collected for two rice growing seasons 2012 to 2013. In results, the maximum mean population of 15.25 WBPH/25 hills at 38 0C with 50% relative humidity was observed in district Badin in the first week of August, 2012. The correlation results regarding mean population of W...

Pakistan Journal of Agricultural Research


Vol. 31, Iss. 4, Pages 291-418


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