Wheat-pea intercropping for aphid control: from laboratory tritrophic approach to field application – IJAAR

Thomas Lopes, Haibo Zhou, Julian Chen, Yong Liu, Bernard Bodson, Frédéric Francis

Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium

Anhui Academy of Science and Technology, Heifei, PR China

Anhui Academy of Applied Technology, Heifei, PR China

State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, PR China

College of Plant Protection, Shandong Agricultural University, Taian, PR China

Crop production, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium

Keywords: Triticum aestivum, Pisum sativum, Aphididae, Biological control.

Wheat-pea intercropping for aphid control: from laboratory tritrophic approach to field application - IJAAR

Abstract

Intercropping is an interesting practice to promote the sustainable control of insect pests such as aphids. In particular, volatile organic compounds emitted by aphid-infested intercropped plants may deter other aphid species from their host plants, while attracting natural enemies. In this study, olfactometer and net-cage behavioural assays were first conducted to determine the effect of wheat-pea mixtures combined with aphid infestations on odour preferences of the wheat aphid Sitobion avenae and two associated predator species, the ladybird Harmonia axyridis and the hoverfly Episyrphus balteatus. Continue reading Wheat-pea intercropping for aphid control: from laboratory tritrophic approach to field application – IJAAR

Investigation of GA3 effect on in vitro micro propagation of potato varieties – IJAAR

Azhar Mehmood, Abbas Hussain Shah, Azhar Hussain Shah, Muhammad Sajid, Habib Ahmad

Department of Botany, GPGC, Mandian Abbottabad, Pakistan

Department of Botany, GPGC, Mansehra, Pakistan

Department of Genetics, Hazara University, Mansehra, Pakistan

Department of Botany, Hazara University, Mansehra, Pakistan

Key words: GA3, Potato, Nodal culture, MS media.

Abstract

In this investigation MS media supplemented with different concentrations of GA3 viz. 0.00, 0.12, 0.25, 0.50, 0.75mg/L were used for in vitro micro propagation of potato varieties Cardinal and Desiree. The parameters included were percent sprout, plantlet height, number of nodes per plantlet, number of days to root initiation, and number of days to transferable height of the plantlets. Continue reading Investigation of GA3 effect on in vitro micro propagation of potato varieties – IJAAR

Functional Feeding Groups among Aquatic insects of the East Kolkata Wetlands – JBES

Paulami Maiti, Durba Bhattacharya

Department of Zoology, Lady Brabourne College, Kolkata, India

Key words: Wetlands, Sewage fed, Insects, Functional feeding groups, Predators.

Abstract

Habitat complexity of wetlands supports diverse organisms where aquatic insects control the structure and dynamics of the food web. In the present study, biodiversity features of aquatic insects are dealt with reference to their taxonomic and functional diversity. Sampled specimen were assigned a habitat and ‘functional feeding group’ as proposed by Cummins and Klug (1979) . Continue reading Functional Feeding Groups among Aquatic insects of the East Kolkata Wetlands – JBES

Assessment of Variation in Agro-morphological Traits in M3 and M4 Maize Lines – IJAAR

Kariuki JK, Githiri SM , Wesonga JM, TS. Tesfamichael

Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya

Key words: Correlations, Kenya, Mutation breeding, Zea mays, Agronomical traits.

Abstract

A total of thirty nine M3 and thirty seven M4 maize lines derived from mutation breeding were evaluated for variation in agro-morphological traits at Jomo Kenyatta University of Agriculture and Technology, Farm, Juja from October 2014 to September 2015 to identify desirable mutants for use in plant breeding programmes. Continue reading Assessment of Variation in Agro-morphological Traits in M3 and M4 Maize Lines – IJAAR

Natural changes in stand structure in the permanent plot of Hyrcanian forests (North of Iran) – JBES

M. Amini, K.H. Saghebtalebi, R. Amini, S.H. Amini

Mazandaran Agricultural and Natural Resources Research and Education Center, AREEO, Sari, Iran

Forest Research Division, Research Institute of Forests and Rangelands, Tehran Iran

Department of Forestry, Gorgan University, Gorgan, Iran

Key words: Beech, Dead wood, Permanent sample plot, Stand, Structure.

Abstract

This research was aimed to investigate natural changes in stand structure of Hyrcanian forests. Forest structure, proportion of dead wood, and proportion of tree species were studied in 2006 and 2012. Results of the inventory of total 2375 trees in 2012, showed 3 layers and uneven-aged structure in a forest type of Fagus orientalis-Carpinus betulus. Continue reading Natural changes in stand structure in the permanent plot of Hyrcanian forests (North of Iran) – JBES