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Push-Pull: Chemical Ecology-Based Integrated Pest Management Technology

Journal of Chemical Ecology volume 42, pages 689–697 (2016)Cite this article

Abstract

Lepidopterous stemborers, and parasitic striga weeds belonging to the family Orobanchaceae, attack cereal crops in sub-Saharan Africa causing severe yield losses. The smallholder farmers are resource constrained and unable to afford expensive chemicals for crop protection. The push–pull technology, a chemical ecology- based cropping system, is developed for integrated pest and weed management in cereal–livestock farming systems. Appropriate plants were selected that naturally emit signaling chemicals (semiochemicals). Plants highly attractive for stemborer egg laying were selected and employed as trap crops (pull), to draw pests away from the main crop. Plants that repelled stemborer females were selected as intercrops (push). The stemborers are attracted to the trap plant, and are repelled from the main cereal crop using a repellent intercrop (push). Root exudates of leguminous repellent intercrops also effectively control the parasitic striga weed through an allelopathic mechanism. Their root exudates contain flavonoid compounds some of which stimulate germination of Striga hermonthica seeds, such as Uncinanone B, and others that dramatically inhibit their attachment to host roots, such as Uncinanone C and a number of di-C-glycosylflavones (di-CGFs), resulting in suicidal germination. The intercrop also improves soil fertility through nitrogen fixation, natural mulching, improved biomass, and control of erosion. Both companion plants provide high value animal fodder, facilitating milk production and diversifying farmers’ income sources. The technology is appropriate to smallholder mixed cropping systems in Africa. Adopted by about 125,000 farmers to date in eastern Africa, it effectively addresses major production constraints, significantly increases maize yields, and is economical as it is based on locally available plants, not expensive external inputs.

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References

  • Abate T, van Huis A, Ampofo JKO (2000) Pest management strategies in traditional agriculture: an African perspective. Annu Rev Entomol 45:631–659

    CAS  Article  PubMed  Google Scholar 

  • Aquino P, Carrion F, Calvo R, Flores D (2001) Selected maize statistics. CIMMYT 1999–2000. World maize facts and trends. Meeting world maize needs: Technological opportunities and priorities for the public sector (ed. by P.L. Pingali), pp. 45–57. CIMMYT, Mexico

  • Arimura G, Ozawa R, Shimoda T, Nishioka T, Boland W, Takabayashi J (2000) Herbivory-induced volatiles elicit defence genes in lima bean leaves. Nature 406:512–515

    CAS  Article  PubMed  Google Scholar 

  • Bebawi FF, Metwali EM (1991) Witch-weed management by sorghum–Sudan grass seed size and stage of harvest. Agron J 83:781–785

    Article  Google Scholar 

  • Birkett MA, Campbell CAM, Chamberlain K, et al. (2000) New roles for cis-jasmone as an insect semiochemical and in plant defense. Proc Natl Acad Sci U S A 97:9329–9334

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  • Bruce TJA, Midega CAO, Birkett MA, Pickett JA, Khan ZR (2010) Is quality more important than quantity? Insect behavioural responses to changes in a volatile blend after stemborer oviposition on an African grass. Biol Lett 6:314–317

    CAS  Article  PubMed  Google Scholar 

  • Cairns JE, Hellin J, Sonder K, Araus JL, MacRobert JF, Thierfelder C, Prasanna BM (2013) Adapting maize production to climate change in sub-Saharan Africa. Food Secur 5:345–360

    Article  Google Scholar 

  • Chidawanyika F (2015) Effects of drought on the production of ectrophysiologically active biogenic volatiles important for cereal pest management. University of the Witwatersrand, South Africa pp. 172 pp (Ph.D. Dissertation)

    Google Scholar 

  • Chidawanyika F, Midega CAO, Bruce TJA, Duncan F, Pickett JA, Khan ZR (2014) Oviposition acceptance and larval development of Chilo partellus stemborers in drought-stressed wild and cultivated grasses of East Africa. Entomol Exp Appl 151:209–217

    Article  Google Scholar 

  • Chitere PO, Omolo BA (1993) Farmers’ indigenous knowledge of crop pests and their damage in western Kenya. Intern J Pest Manage 39:126–132.

  • Cook SM, Khan ZR, Pickett JA (2007) The use of ‘push–pull’ strategies in integrated pest management. Annu Rev Entomol 52:375–400

    CAS  Article  PubMed  Google Scholar 

  • De Groote H, Vanlauwe B, Rutto E, Odhiambo GD, Kanampiu F, Khan ZR (2010) Economic analysis of different options in integrated pest and soil fertility management in maize systems of Western Kenya. Agric Econ 41:471–482

    Article  Google Scholar 

  • FAO (2011) The status of food insecurity in the world. Food and agriculture organization, Rome

    Google Scholar 

  • Fischer G, Shah M, Tubiello F, van Velthuizen H (2005) Socioeconomic and climate change impacts on agriculture: An integrated assessment, 1990 – 2080. Philos Trans R Soc B 360:2067–2083

    Article  Google Scholar 

  • Frost DL, Gurney AL, Press MC, Scholes JD (1997) Striga hermonthica reduces photosynthesis in sorghum: The importance of stomatal limitations and a potential role for ABA? Plant Cell Environ 20:483–492

    CAS  Article  Google Scholar 

  • Gethi JG, Smith ME, Mitchell SE, Kresovich S (2005) Genetic diversity of Striga hermonthica and Striga asiatica populations in Kenya. Weed Res 45:64–73

    CAS  Article  Google Scholar 

  • Gressel J, Hanafi A, Head G, Marasas W, Obilana AB, Ochanda J, Souissi T, Tzotzos G (2004) Major heretofore intractable biotic constraints to African food security that may be amenable to novel biotechnological solutions. Crop Prot 23:661–689

    Article  Google Scholar 

  • Gurney AL, Press MC, Scholes JD (1999) Infection time and density influence the response of sorghum to the parasitic angiosperm Striga hermonthica. New Phytol 143:573–580

    Article  Google Scholar 

  • Hilker M, Meiners T (2006) Early herbivore alert: Insect eggs induce plant defense. J Chem Ecol 32:1379–1397

    CAS  Article  PubMed  Google Scholar 

  • Hooper AM, Tsanuo MK, Chamberlain K, Tittcomb K, Scholes J, Hassanali A, Khan ZR, Pickett JA (2010) Isoschaftoside, a C-glycosylflavonoid from Desmodium uncinatum root exudate, is an allelochemical against the development of Striga. Phytochemistry 71:904–908

    CAS  Article  PubMed  Google Scholar 

  • Hooper AM, Caulfield JC, Hao B, Pickett JA, Midega CAO, Khan ZR (2015) Isolation and identification of Desmodium root exudates from drought tolerant species used as intercrops against Striga hermonthica. Phytochemistry 117:380–389

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  • Jones PG, Thornton PK (2003) The potential impacts of climate change on maize production in Africa and Latin America in 2055. Glob Environ Chang 13:51–59

    Article  Google Scholar 

  • Kfir R, Overholt WA, Khan ZR, Polaszek A (2002) Biology and management of economically important lepidopteran cereal stemborers in Africa. Annu Rev Entomol 47:701–731

    CAS  Article  PubMed  Google Scholar 

  • Khan ZR (2002) Cover crops. In: Pimentel D (ed) Encyclopedia of pest management. Marcel Dekker, Inc., USA, pp. 155–158

    Google Scholar 

  • Khan ZR, Chilishwa P, Ampong-Nyarko K, Smart LE, Polaszek A, Wandera J, Mulaa MA (1997a) Utilisation of wild gramineous plants for the management of cereal stemborers in Africa. Insect Sci Appl 17:143–150

    Google Scholar 

  • Khan ZR, Ampong-Nyarko K, Chilishwa P, et al. (1997b) Intercropping increases parasitism of pests. Nature 388:631–632

    CAS  Article  Google Scholar 

  • Khan ZR, Pickett JA, Van Den Berg J, Wadhams LJ, Woodcock CM (2000) Exploiting chemical ecology and species diversity: Stemborer and Striga control for maize and sorghum in Africa. Pest Manag Sci 56:957–962

    CAS  Article  Google Scholar 

  • Khan ZR, Hassanali A, Overholt W, Khamis TM, Hooper AM, Pickett AJ, Wadhams LJ, Woodcock CM (2002) Control of witchweed Striga hermonthica by intercropping with Desmodium spp., and the mechanism defined as allelopathic. J Chem Ecol 28:1871–1885

    CAS  Article  PubMed  Google Scholar 

  • Khan ZR, Midega CAO, Hutter NJ, Wilkins RM, Wadhams LJ (2006a) Assessment of the potential of Napier grass (Pennisetum purpureum) varieties as trap plants for management of Chilo partellus. Entomol Exp Appl 119:15–22

    Article  Google Scholar 

  • Khan ZR, Midega CAO, Pickett JA, Wadhams LJ, Hassanali A, Wanjoya A (2006b) Management of witchweed, Striga hermonthica, and stemborers in sorghum, Sorghum bicolor, through intercropping with greenleaf desmodium, Desmodium intortum. Int J Pest Manag 52:297–302

    Article  Google Scholar 

  • Khan ZR, Pickett JA, Wadhams LJ, Hassanali A, Midega CAO (2006c) Combined control of Striga and stemborers by maize–Desmodium spp. intercrops. Crop Prot 25:989–995

    Article  Google Scholar 

  • Khan ZR, Midega CAO, Wadhams LJ, Pickett JA, Mumuni A (2007a) Evaluation of Napier grass (Pennisetum purpureum) varieties for use as trap plants for the management of African stemborer (Busseola fusca) in a ‘push–pull’ strategy. Entomol Exp Appl 124:201–211

    Article  Google Scholar 

  • Khan ZR, Midega CAO, Hassanali A, Pickett JA, Wadhams LJ (2007b) Assessment of different legumes for the control of Striga hermonthica in maize and sorghum. Crop Sci 47:728–734

    Article  Google Scholar 

  • Khan ZR, Midega CAO, Njuguna EM, Amudavi DM, Wanyama JM, Pickett JA (2008) Economic performance of ‘push–pull’ technology for stem borer and striga weed control in smallholder farming systems. Crop Prot 27:1084–1097

    Article  Google Scholar 

  • Khan ZR, Midega CAO, Bruce TJA, Hooper AM, Pickett JA (2010) Exploiting phytochemicals for developing a push –pull crop protection strategy for cereal farmers in Africa. J Exp Bot 61:4185–4196

    CAS  Article  PubMed  Google Scholar 

  • Khan ZR, Midega CAO, Pittchar J, et al. (2014) Achieving food security for one million sub-Saharan African poor through push–pull innovation by 2020. Philos Trans R Soc B 369:20120284

    Article  Google Scholar 

  • Lagoke STO, Parkinson V, Agunbiade RM (1991) Parasitic weeds and control methods in Africa. In: Kim SK (ed) Combating Striga in Africa. Proceedings of an International Workshop organized by IITA, ICRISAT and IDRC; 1988 August 22–24. IITA, Ibadan, pp. 3–14

    Google Scholar 

  • Maes K (1998) Pyraloidea: Crambidae, Pyralidae. In: Polaszek, A, ed. African cereal stem borers: Economic importance, taxonomy, natural enemies and control Wallingford: CAB International, 87–98.

  • Magara HJO, Midega CAO, Otieno AA, Ogol CKPO, Bruce TJA, Pickett JA, Khan ZR (2015) Signal grass (Brachiaria brizantha) oviposited by stemborer (Chilo partellus) emits herbivore-induced plant volatiles that induce neighbouring local maize (Zea mays) varieties to recruit cereal stemborer larval parasitoid Cotesia sesamiae. Int J Sci Basic Appl Res 19:341–375

    Google Scholar 

  • Midega CAO, Khan ZR, Van den Berg J, Ogol CKPO, Bruce TJ, Pickett JA (2009) Non-target effects of the ‘push–pull’ habitat management strategy: Parasitoid activity and soil fauna abundance. Crop Prot 28:1045–1051

    Article  Google Scholar 

  • Midega CAO, Khan ZR, Amudavi DA, Pittchar J, Pickett JA (2010) Integrated management of Striga hermonthica and cereal stemborers in finger millet (Eleusine coracana (L.) Gaertn.), through intercropping with Desmodium intortum. Int J Pest Manag 56:145–151

    Article  Google Scholar 

  • Midega CAO, Khan ZR, Pickett JA, Nylin S (2011) Host plant selection behaviour of Chilo partellus and its implication for effectiveness of a trap crop. Entomol Exp Appl 138:40–47

    Article  Google Scholar 

  • Midega CAO, Salifu D, Bruce TJA, Pittchar J, Pickett JA, Khan ZR (2014) Cumulative effects and economic benefits of intercropping maize with food legumes on Striga hermonthica infestation. Field Crop Res 155:144–152

    Article  Google Scholar 

  • Midega CAO, Bruce TJA, Pickett JA, Pittchar JO, Murage A, Khan ZR (2015a) Climate-adapted companion cropping increases agricultural productivity in East Africa. Field Crop Res 180:118–125

    Article  Google Scholar 

  • Midega CAO, Bruce TJA, Pickett JA, Khan ZR (2015b) Ecological management of cereal stemborers in African smallholder agriculture through behavioral manipulation. Ecol Entomol 40(Suppl. 1):70–81

    Article  PubMed  PubMed Central  Google Scholar 

  • Midega CAO, Wasonga CJ, Drinkwater LE, Hooper AM, Pickett JA, Khan ZR (2016) Drought tolerant Desmodium species effectively suppress parasitic weeds, improve grain yields and soil health in smallholder African farming systems. Agric Ecosyst Environ (in press)

  • Muchena FN, Onduru DD, Gachini GN, de Jager A (2005) Turning the tides of soil degradation in Africa: Capturing the reality and exploring opportunities. Land Use Policy 22:23–31

    Article  Google Scholar 

  • Odendo M, De Groote H, Odongo OM (2001) Assessment of farmers’ preferences and constraints to maize production in moist mid-altitude zone of Western Kenya. Paper Presented at the 5th International Conference of the African Crop Science Society (ed. by H. Malika), pp. 1–12. Nigeria, African Crop Science Society, Kampala

  • Oswald A (2005) Striga control technologies and their dissemination. Crop Prot 24:333–342

    Article  Google Scholar 

  • Parker C, Riches CR (1993) Parasitic weeds of the world: Biology and control. CAB International, Wallingford

    Google Scholar 

  • Pickett JA, Bruce TJA, Chamberlain K et al (2006) Plant volatiles yielding new ways to exploit plant defence. Chemical ecology: From gene to ecosystem (ed. by M. Dicke and W. Takken), pp. 161–173. Springer, Wageningen

  • Pickett JA, Hamilton ML, Hooper AM, Khan ZR, Midega CAO (2010) Companion cropping to manage parasitic plants. Annu Rev Phytopathol 48:161–177

    CAS  Article  PubMed  Google Scholar 

  • Polaszek A, Khan ZR (1998) Host plants. In: Polaszek A (ed) African cereal stem borers: Economic importance, taxonomy, natural enemies and control. CABI, Wallingford, pp. 3–10

    Google Scholar 

  • Schulte F, Bosque-Perez NA, Chabi-Olaye A, Gounou S, Ndemah R, Georgen G (1997) Exchange of natural enemies of lepidopteran cereal stemborers between African regions. Insect Sci Appl 17:97–108

    Google Scholar 

  • Tamiru A, Bruce TJA, Woodcock CM, et al. (2011) Maize landraces recruit egg and larval parasitoids in response to egg deposition by a herbivore. Ecol Lett 14:1075–1083

    Article  PubMed  Google Scholar 

  • Tamiru A, Bruce T, Midega CAO, et al. (2012) Oviposition-induced volatile emissions from African smallholder farmers’ maize varieties. J Chem Ecol 38:231–234

    CAS  Article  PubMed  Google Scholar 

  • Tsanuo MK, Hassanali A, Hooper AM, Khan ZR, Kaberia F, Pickett JA, Wadhams L (2003) Isoflavanones from the allelopathic aqueous root exudates of Desmodium uncinatum. Phytochemistry 64:265–273

    CAS  Article  PubMed  Google Scholar 

  • Turlings TCJ, Scheepmaker JWA, Vet LEM, Tumlinson JH, Lewis WJ (1990) How contact experiences affect preferences for host-related odors in the larval parasitoid Cotesia marginiventris (Cresson) (Hymenoptera: Braconidae). J Chem Ecol 16:1577–1589

  • Van Emden HF (1990) Plant diversity and natural enemy efficiency in agroecosystems. In: Mackauer M, Ehler LE, Roland J (eds) Critical issues in biological control. Intercept, Andover, pp. 63–80

    Google Scholar 

  • Whitney AS (1966) Nitogen fixation by three tropical forage legumes and the utilization of legume-fixed nitrogen by their associated grasses. Herbage Abstr 38:143

    Google Scholar 

  • World Bank (2008) World development report 2008: Agriculture for development. The World Bank, Washington, District of Columbia

  • Yoder JI (1999) Parasitic plant responses to host plant signals: a model for subterranean plant–plant interactions. Curr Opin Plant Biol 2:65–70

    CAS  Article  PubMed  Google Scholar 

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Acknowledgments

The International Centre of Insect Physiology and Ecology (icipe) appreciates the core support from the Governments of Sweden, Germany, Switzerland, Denmark, Norway, Finland, France, Kenya, and the UK. The work on push–pull technology is funded primarily by the European Union, with additional support from the Biovision Foundation and DFID. Rothamsted Research receives grant-aided support from the Biotechnology and Biological Sciences Research Council (BBSRC), UK.

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Affiliations

  1. International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772, Nairobi, 00100, Kenya

    Zeyaur Khan & Charles A. O. Midega

  2. Biological Chemistry and Crop Protection Department, Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK

    Antony Hooper & John Pickett

Authors
  1. Zeyaur Khan
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  2. Charles A. O. Midega
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  3. Antony Hooper
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  4. John Pickett
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Correspondence to Zeyaur Khan.

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Khan, Z., Midega, C.A.O., Hooper, A. et al. Push-Pull: Chemical Ecology-Based Integrated Pest Management Technology. J Chem Ecol 42, 689–697 (2016). https://doi.org/10.1007/s10886-016-0730-y

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  • DOI: https://doi.org/10.1007/s10886-016-0730-y

Keywords

  • Cereal crops
  • Stemborer pests
  • Parasitic striga
  • Semiochemicals
  • Allelopathy