فیزیولوژی محیطی گیاهی (Mar 2009)
Effect of neem seed powder on tomato root-knot nematode Meloidogyne Incognita Mill.
Abstract
Attention to bad effect of chemical control, usage of plant material in diseases controling finds more attraction. The effect of neem seed powder against tomato root-knot nematode, Meloidogyne incognita (Kofoid & White) Chitwood. Was investigated in green house condition and compared with the effect of Carbofuran. Treatments were control, nematode, nematode and Carbofuran, nematode and neem seed powder. Tomato plants inoculated at seedling stage with 2000 second stage juvenile nematodes per plant. Experiments were carried out in completely randomized design with four replicates. The investigated morphological indices contained wet and dry weight of roots and shoots, stem height, root length, final population of nematodes, reproduction rate and root knot index. The results showed that neem seed powder and Carbofuran treatments had maximum effects on plant growth and produced minimum root-galls. On the other hand, they decreased total population of nematodes in soil and root significantly (P=0.01). The most wet weight, 4.72, dry weight 0.15 and also, the highest shoots, 25.23 were recorded in neem seed powder treatment and in compare with control cause 0.3 percentage reduction in nematode population was observed in pots treated with neem seed powder. So, in this research neem has better effect in nematode population control rather than Carbofuran.
