Indian Journal of Agricultural Research

  • Chief EditorT. Mohapatra

  • Print ISSN 0367-8245

  • Online ISSN 0976-058X

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  • SJR 0.293

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Indian Journal of Agricultural Research, volume 55 issue 6 (december 2021) : 756-760

​Effect of Mixed Crops on Soil Plant Parasitic Nematodes in Lettuce Cultivation (Lactuca sativa L.)

Lilyana Koleva, Ivanka Mitova
1Department of Plant Protection, University of Forestry, Kliment Ohridsky Blvd 10, 1797 Sofia, Bulgaria.
Cite article:- Koleva Lilyana, Mitova Ivanka (2021). ​Effect of Mixed Crops on Soil Plant Parasitic Nematodes in Lettuce Cultivation (Lactuca sativa L.). Indian Journal of Agricultural Research. 55(6): 756-760. doi: 10.18805/IJARe.A-622.
Background: Lettuce (Lactuca sativa L.) is an annual plant with very rapid growth and a major species in the assortment of leafy vegetables. Plant parasitic nematodes are economically important pests of leafy vegetables in monoculture and intensive organic fertilization. The simultaneous cultivation of several plant species in the same area can overcome the disadvantages of crops from homogeneous crops. The purpose of this work is to determine the quantitative changes in soil nematode communities in the joint cultivation of medicinal and vegetable species. 
Methods: The experiments were carried out in a vegetation house. To create mixed crops, the plants the lettuce (Lactuca sativa L.), cutivar ‘Bohemia’, tagetes (Tagetes sp. L.), basil (Ocimum basilicum L.), calendula (Calendula officinalis L.) summer savory (Satureja hortensis L.) and arugula (Eruca sativa L. Cav.) were used. 
Result: The results of the nematological analysis showed a decrease in the number of nematodes when mixed growing of lettuce with arugula, calendula and tagetes. The mixed growing of lettuce and calendula resulted in a significant reduction in nematodes, with a Pf/Pi value of 0.3. As a result of the decrease in the nematode population, there was an increase in lettuce yields when mixed grown with arugula and calendula, compared to when grown alone. The study of plant parasitic nematodes based on comparative evaluation of different combinations of plants shows that combinations of crops can be applied as a control method in integrated plant protection systems.

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