Journal
JOURNAL OF PEST SCIENCE
Volume 83, Issue 3, Pages 216-220Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10340-010-0287-4
Keywords
Alternative management; Meloidogyne hapla; Plant essences
Categories
Funding
- Czech Ministry of Agriculture [QG50087, MZE0002700604]
- Czech Ministry of Education [MSM6046070901]
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The northern root-knot nematode (Meloidogyne hapla) is a prominent root vegetable pest in the Czech Republic. Effects of several plant essences for M. hapla management on carrot (Daucus carota) were tested. The tested compounds included commercially available plant essences from Ocimum basilicum (sweet basil), Mentha arvensis (field mint), Tagetes erecta (Mexican marigold), and commercial product of neem seed (Azadirachta indica). Two further essences from Eugenia caryophyllata (clove) and Origanum majorana (marjoram) were obtained by distillation. Tests were conducted on container-grown carrots maintained under field conditions. The delivery method involved absorbing the tested essences in perlite particles placed in a substrate. The results showed a negative correlation between gall numbers of the carrots and treatment concentrations, especially for clove and majoram. Similar results were achieved when considering M. hapla egg numbers. Furthermore, the same treatments showed significant differences (P a parts per thousand yen 0.05) in fresh and dry root weights. Based on these results the management of M. hapla using plant essences seems to be possible, however, further research is desirable to determine the appropriate dosage needed for efficient and most appropriate delivery method of these substances under field conditions.
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