| 1. CORIANDER WILT
The occurrence of the disease in India has been reported from Madhya Bharat as early as 1952. In favourable weather, the disease causes significant yield reductions.
i) Follow long crop rotations.
ii) Collect and burn the infected plant debris
iii) Addition of oil cakes in the soil and raising of soil pH to 8.2 is also found effective in reducing the disease incidence.
iv) Coriander varieties/ lines like MP 5365 and UD 373 showed least infection to the disease and can be used in breeding programme for developing resistant varieties.
v) Treat the seed with carbendazim (0.2%) followed by sprays with carbendazim (0.1%) reduce the disease.
vi) Seed treatment with Trichoderma viride (4g/kg seed) was also found effective in reducing the disease incidence.
2. STEM GALL
It is the most important disease of this crop causing considerable yield losses.
i) The disease affects less in the early and late sown crops. Sowing crop around 16 October and 16 November gave minimum yield losses.3. POWDERY MILDEW
ii) Use of clean and healthy seed and follow suitable crop rotation.
iii) Use resistant cvs./ lines like JD 1, G-5365-91, Pant Haritma, UD 20, Rcr 41, Pant-1, CIMAP 2053.
iv) Seed treatment with captan/ thiram (0.3%) followed by their foliar sprays were found effective in managing this disease.
Powdery mildew of coriander is an important disease of this crop and in favourable dry weather conditions can cause significant yield reductions.
4. Seed Rot and Seedling Mortality
Many fungi viz., Alternaria alternata , Aspergillus candidus, A. flavus, Curvularia lunata, C. pallescens, Cladosporium oxysporum, C. herbarum, Fusarium spp., Penicillium spp. and Stachybotrys spp. from seeds of coriander and one soil inhabitant Pythium irregulare have been reported to induce seed and seedling mortality. The pre-harvest rains increased the frequency of endophytic seed mycoflora (species of Alternaria, Cladosporium and Curvularia) and reduced the germination of spores. Seed treatment with mancozeb, captan, carbendazim + captafol and captafol proved effective to some extent to achieve better crop stand.
Last modified: Friday, 2 March 2012, 5:51 AM