Effects of metalaxyl on agronomic traits of zero tannin lentil
Peer Reviewed StatusNon-Peer Reviewed
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The seed coat of lentil (Lens culinaris Medikus) contains tannin precursors which oxidize during storage, discolouring seed from the normal olive green to deep brown. Seed coats of zero tannin (ZT) lentil do not discolour during storage due to the absence of these tannin precursors. ZT lentil has a thinner, more delicate seed coat than standard lentils. Thus, ZT lentil seed is highly susceptible to mechanical damage and germinating seeds have a high frequency of seed rot. The effect of fungicide on seedling emergence and other agronomic traits of ZT lentil was investigated using a split-plot design replicated three times for two years. The main effect was lentil lines and the split effect was untreated seed vs. seed treated with the fungicide metalaxyl (6g a.i./100 kg seed). Seedling emergence of ZT lentil was greatly improved following fungicidal seed treatment with metalaxyl. Fungicidal seed treatment had no effect on agronomic traits of ZT lentil, other than seedling emergence and seed yield. Commercial production of ZT lentil must involve fungicidal seed treatment and special precautions during seeding, harvesting, and cleaning to minimize mechanical damage to the seeds. These ZT lines did not yield competitively with Eston or Laird lentil. A second cycle of hybridization of the better ZT lentil lines to adapted lines followed by selection for yield should increase the frequency of high yielding ZT lentil lines.
Part OfSoils and Crops Workshop
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