The effect of the wild mustard herb Brassica nigra on some biological and environmental characteristics of the Wheat Stem Sawfly (Hymenoptera: Cephidae)
الملخص
Wild mustard, Brassica nigra, is one of the most common flowering herbs associated with wheat and barley crops in Syria. Since its flowers may be a source of food for adults of the genus Collryia (Hymenoptera: Ichneumonidae), which is one of the most important parasitoids of the wheat stem sawfly (Hymenoptera: Cephidae), which are harmful to wheat and barley crops, this research therefore aimed to study the effect of the availability of this herb on the edges of its fields. In increasing the efficiency of these parasites with the aim of improving the process of biological control of the wheat stem sawfly, as well as the vitality of the wheat stem sawfly because they are always observed gathering on its flowers.
Experiments were conducted in the fields of the Soran area in Hama Governorate by planting a variety sensitive to wheat stem sawfly infestation (Sham 5) in the form of two treatments with or without wild mustard. The results showed an increase in the efficiency of the parasite Collyria spp. When wild mustard was available; The average parasitism rate on sawfly wasp eggs was recorded at 27.4%, compared to 18.78% when wheat was grown alone, with significant differences between them, which indicates the presence of a positive effect of the wild mustard herb in increasing the parasitism rates with these parasites. However, on the other hand, the presence of the herb Mustard had a negative effect, represented by an increase in the rate of infection of wheat plants with wheat stem sawfly. The average field infection rate reached 25.6% in the presence of wild mustard, while the infection rate was 14.1% when wheat was grown alone, with significant differences between them. The life span and fertility of female wasps also increased with Feeding on wild mustard flowers compared to females that were not presented with flowers. Accordingly, we suggest the necessity of getting rid of this weed within the field and its edges, and at the same time searching for other sources of flowering plants that can be planted on the edges of the fields or as strips within the fields during the period of the presence of wheat stem sawfly so that they are only supportive of the parasitoids.
References
Beres BL, Dosdall LM, Weaver DK, Carcamo HA and Spaner DM. 2011: Biology and integrated management of wheat stem sawfly and the need for continuing research. Canadian Entomologist 143: 105–125.
Clarke FR, Clarke JM, and Knox RE 2002: Inheritance of stem solidness in eight-durum wheat crosses. Canadian Journal of Plant scince 82: 661-664.
Jervis, M., and L. Vilhelmsen. 2000. Mouthpart evolution in adults of the basal, ‘symphytan,’ hymenopteran lineages. Biol. J. Linn. Soc. 70: 121–146.
El-Bouhssini M, Lhaloui S, Hatchett J, Mulitze D, Starks K. 1987. Preliminary evaluation of sawfly damage to small grains in Morocco. Rachis: Barley and Wheat Newsl. 6 (2): 29–31.
Holmes, N. D. 1977: The effect of the wheat stem sawfly, Cephus cinctus Hymenoptera: (Cephidae), on the yield and quality of wheat. Canadian Entomologist 109: 1591–1598.
Holmes, N. D. and L. K. Peterson. 1962: Resistance of spring wheats to the wheat stem sawfly, Cephus cinctus Nort. (Hymenoptera: Cephidae) II. Resistance to the larva. Canadian Entomologist. 94: 348–365.
Miller RH, Elmasri S and Aljundi K. 1993: Plant density and wheat stem sawfly (Hymenoptera: Cephidae) resistance in Syrian wheats. Bulletin of Entomological Research 83: 95–102.
Miller, R. H.; S. El Masri and K. Aljundi, 1992: Incidence of wheat stem sawfly and their natural enemies on wheat and barley in Northern Syria. Arab Journal of Plant Protection. 10(1):25-30.
Miller R. 1991: Insect pests of wheat and barley in West Asia and North Africa. Technical Bulletin 9. International Centre for Agricultural Research in the Dry Areas (ICARDA), Aleppo, Syria. pp. 136.
Miller, R. H., 1987. Insect pests of wheat and barley in West Asia and North Africa. Technical Manual No. 9 (Rev. 1), 209 p. ICARDA, Aleppo, Syria.
Morrill, W. L., D. K. Weaver, N. J. Irish & W. F. Barr. 2001: Phyllobaenus dubius (Wolcott) (Coleoptera: Cleridae), a new record of a predator of the wheat stem sawfly (Hymenoptera: Cephidae). Journal of the Kansas Entomological Society 74(3): 181–183.
Morrill WL, Kushnak GD, Bruckner PL and Gabor JW.1994: Wheat stem sawfly damage rates of parasitism and overwintering survival in resistant wheat lines. Journal of Economic Entomology 87: 1373–1376.
Ozberk ,I., Atli , A., Yucel , A., Ozberk, F.& Coskun,Y . 2005: Wheat stem sawfly (Cephus pygmaeus L.) damage; impacts on grain yield, quality and marketing prices in Anatolia . Crop Protection, 24, 1054 –1060.
Payne, R.W., Murray DA, Harding SA, Baird DB, Soutar DM. 2013. Introduction to GenStat for Windows (16th Edition) Introduction. VSN International, Hemel Hempstead
Pfiffner L., Luka H., Schlatter M., Lichtenhahn M, 2006: Wildflower strips to reduce lepidopteran pests in cabbage crops. In: Landscape Management for Functional Biodiversity. IOBC/WPRS Bulletin, 29: 97–99.
Rashwani A. 1983: Preliminary survey of wheat stem sawfly (Cephus spp.) incidence in Syria. RACHIS (no.2) p. 23.
Robinson, R.A. & Sutherland, W.J. 2002: Post-war changes in arable farming and biodiversity in Great Britain. Journal of Applied Ecology, 39(1), 157-76.
Shanower TG and Hoelmer KA. 2004: Biological control of the wheat stem sawflies: past and future. Journal of Agricultural and Urban Entomology 21: 197–221.
Songbi, Ch., Hoelmer, K.A., Hongyin, Ch., Aiping, L, and T.G. Shanower 2005: A Review of wheat stem sawfly (Hymenoptera: Cephidae) research in China. Journal of Agricultural and Urban Entomology Vol. 21, No. 4: 249- 256.
Tukey. JW. 1949. One degree of freedom for non-additivity. Biometrics, v.5, p.232-242.
van Rijn P.C.J., Kooijman J., Wäckers F.L.,2006: The impact of floral resources on hoverflies performance and cabbage aphid biological control In: Landscape Management for Functional Biodiversity. IOBC/WPRS Bulletin, 29: 149–152.
Wäckers, F.L., van Rijn, P.C.J. & Bruin, J. (Eds.) 2005: Plant-provided Food for Carnivorous Insects: A Protective Mutualism and its Applications. Cambridge University Press, UK.
Wallace, L. E. and F. H. McNeal. 1966: Stem sawflies of economic importance in grain crops in the United States. USDA Tech. Bull. 1350. pp. 50.
Weiss, M.J., Morrill, L.W. and Reitz, L.L. 1992: Wheat stem sawfly (Hymenoptera: Cephidae) revisited. American Entomologist 38: 241–245.
Zhe, L.-M., C.-J. Zhang, L. Chen & H. Chang. 1995. A study of the bionomics and IPM of C. fumipennis. Plant Protection Technology. and Extension 5: 6–7. [in Chinese].
