"Allelopathic Effects of Euphorbia helioscopia and Papaver rhoeas on Germination and Initial Seedling Growth of Cereal Crops and Weed seeds"

Muhammed N. Khasraw, Kamil M. Mustafa, Hussein M. Aziz, Kawa F. Mustafa, Saman A. Ahmad, Fawzy F. Khorsheed
Field Crop Department, Faculty of Agriculture sciences, University of Sulaimani, Iraq.


A laboratory study was conducted to investigate the allelopathic effect of aqueous
extracts of fresh roots and leaves of sunspourge and field- poppy weeds on germination
and growth of four different plant species; wheat, barley, wild mustard and seabious
seeds. Maximum stimulation ratio of germination percentage was observed on barley
seeds with sunspourge root extract was 23.46%. Maximum stimulation ratio of wheat
root length was 59.16% with sunspourge leaf extract and was 33.02% for barley with
field poppy root extract, while poppy leaf extract reduced wild mustard and seabious root
length ratio by 37.22% and 29.99% respectively. The highest stimulatory ratio of wheat
shoot length was 10.84% with poppy leaf extract at the same time reduced seabious
shoot length by 18.52%. Maximum increasing of wheat fresh weight was 88.76% with
poppy leaf extract and was 87.94% with sunspourge extract leaf for barley while
sunspourge leaf extract decreased wild mustard fresh weight by 77.64%. The highest
increasing ratio of barley seedling dry weight recorded with sunspourge leaf extract was

Key Words:
allelopathy, germination, cereal crops, weed control.


[1]   Dikic, M. 2005: Allelopathic effect of cogermination of aromatic and medicinal plants and weed seeds. Herbologia, 6 (1), 15-24.

[2]   Shah, S. R., A.K., Ijaz and S.A. Shah. 2006. Study of medical plants among weeds of wheat and maize in Peshawar region. Pak. J. Weed Sci. Res., 12: 191-197.

[3]   Jabeen, Nasira, Moinuddin Ahmed, Syed Shahid Shaukat and Iram-us-Salam, 2013. Allelopathic effects of weeds on wheat (Triticum Aestivum L.) germination and growth. Pak. J. Bot., 45(3): 807-811.

[4]    Salam,  M. M, H. Kato – Noguchi 2010: Allelopathic  potential of methanol extract of Bangladesh rice seedlings, Asian  J. of crop Sci. , 292: 70 – 77.

[5]    Ravlic, Marija, Renata Balicevic, Mira Knezevic and Ivana Ravlic. 2012: Allelopathiceffect of scentless mayweed and field poppy on seed germination and initial growth of winter wheat and        barley. Herbologia J., Vol. 13, No.2: 1-6.

[6]   Torra, J., J. L Gonzalez Andujar and  J. Recasen. 2008: Modelling the population dynamics of Papaver rhoeas under the various weed management system in a Mediterranean climate. weed  Res., 48 :136- 156.

[7]   Cirujeda, Alicia, Jordi Recasens, Joel Torra and Andreu Taberner. (2008). A germination           study of herbicide resistant field poppies in Spain. Agron. Sustain Dev. 28: 207-220.

[8]   Gativa, Svetla, Gabriele Jovtche, Alexander Stankov and Fnidrich Gregan (2014). International Journal of pharmacy and pharmaceutical sciences, Vol.6, issue 1.

[9]   Mohamed, Abou-El-Hamd H., Mohamed- Elamir F. Hegazy, Mahmoud F. M. Moustafa, Magdi A. El- Sayed, Ibrahim B. Abdel-Farid, Abeer M. Esmail, Mohamed H. Abdelrazik, Naglaa S. Mohamed, Gomah Nennah, Tarik A. Mohamed, Abdel Laaty A. Shahat, Joe Karchesy, Hisashi Matsuda, and Paul W. Pare. 2012. Euphorbia helioscopia : chemical constituents and biological activity. International J. Of Phytopharmacology. 3 (1): 78-90.

[10] Tanveer, A., A. Rehman, M. M. Javid, R. N. Abbas, M. Sibtain, A. U. H. Ahmad, M. S. Ibin-Izmir, K. M. Chaudhary, and A. Aziz .2010: Allelopthic potential of Euphorbia helioscopia L. against wheat (Triticum aestivum L.), checkpea (Cicer arietinum L.) and lentil (Lens culinaris Medic.). Turk. J. Agric. Sci; 34: 75-81.

[11] Bunni, Farid.1973. Poisonous plant in Iraq. Ministry of Agriculture, Republic of            Iraq. Technical Bulletin No. 143.

[12] Kotoch, Rajan, Anita and Neelam thakur. 2012 . Allelopathic influence of dominant weed of north–Western Himalayan region on common cereal crops. Int. J. of Env. Sci., 3 (1).

[13] Ghafarbi, Soheila Porheidar, Sirous Hassannejad and Ramin Lotfi. 2012. Allelopathic effects of wheat seed extracts on seed and seedling growth eight selected weed species. International J. of Agri. and Crop Sci., 4 (19): 1452-1457.

[14] Majeed, A., Z. Chundry, Z. Muhammad, 2012. Allelopathic assessment of fresh            aqueous extracts of Chenopodium album L. for growth and yield of wheat (Triticum aestivum L.). Pak. J. Bot., 44,165-167. 

[15] Ellis, R. A., E. H., Roberts, 1981. The Quantification of ageing and survival in orthodox seeds. Seed Sci. Technol., 373-409.

[16] AOSA, 1983. Seed vigor hand testing book. Contribution No. 32. To handbook of seed testing. Association of Official Seed Analysis. Spring field, 11.  

[17] Hamayun M, F. Hussain, S. Afzal and N. Ahmad,2005. Allelopathic effects of cyperus rotundus and Echinochloa cusgali on seed germination, Plumule and radical growth in maize (Zea mays L.). Pakistan journal of Weed Science Research, 11: 81-84.

[18] Ghodake, S. D., M. D. Jagtap and M. B. Kanade (2012).  Allelopathic effect of  three Euphorbia species on seed germination and seedling growth of wheat. Annuals of Biological Research, 3(10): 4801-           4803.

[19] Dhole, J. A., K. D. Lone, G. A. Dhole and S. S. Bodke. (2013).  Allelopathic effect of aqueous and ethanolic extracts of some common weeds on seed health of Triticum aestivum L. (wheat). Int. J. Curr. Microbial. App. Sci., 2 (6): 254-260.

[20] Obaid, K.A. and J. R. Qasem (2005). Phytotoxicity of some common weed species to certain vegetable crops grown in Jordan. Dirasat, Agricultural sciences, 32 (1):10-20.

[21] Aziz, A., Tanveer, A. Ali, M. Yasin, BH. Babar and MA. Nadeem. 2008. Allelopathic effect of cleavers (Galium aparine) on germination and early growth of wheat (Triticum aestivum L.). Allelopathy J., 22: 25-34.

[22] Ankita, Gupta and Mittal Chabbi, 2012. Effect of allelopathic leaf extracts of some selected weed flora of Ajmar district on seed germination of flora of Ajmar district on seed germination of Triticum aestivum L. , Sci Res. Reporter. 2(3): 311-315.

[23] Iman, A., S. Wahab., M. Rastan, M. Halim, 2006: Allelopathic effect of sweet corn and vegetable soybean extracts at two growth stages on germination and seedling growth of corn and soybean varieties. J. of Agronomy, 5, 62-68.

[24] Marino-Serafimov, P. 2010: Determination of allelopathic effect of some invasive weed species on germination and initial development of grain legume crops. Pestic. Ohytomed. 25, 251-259.

[25] Kanlinova, S., I., Golubinova, A. Hristoskov. A. Ilieva, 2012: Allepathic effect of aqueous extract from root system of Johnson grass on the seed germination and initial development of soybean, pea and vetch. Herbalogia, 13 (1): 1-10.

[26] Jawahar, S., C.  Kalaiyarasan and K. Suseendran 2010: Allelopathic effects of Lantana Kamara aqueous extract on seed germination and seedling growth of Trianthem Portulacastrum. Jawa [email protected]