The Tamil Nadu Agricultural University has suggested certain plant protection measures to be undertaken by farmers to combat pests and diseases that are peculiar to this season in various districts.
According to a release from the university, Krishnagiri and Virudhunagar districts are plagued by damage of leaf in paddy that crosses the Economic Threshold Level (ETL).
Farmers are advised to spray 5 per cent neem seed kernel extract to mitigate the damage.
Another threat is found in the form of Brown Plant Hopper (BPH) for which use of light traps and yellow traps are suggested.
Controlled irrigation, followed by intermittent draining, has to be practised.
Need-based application of, either phosphamidon 40 SL 400 ml an acre, or monocrotophos 36 SL 500 ml an acre, or phosalone 35 EC 600 ml an acre, may be taken up to minimise the BPH population.
Incidences of bacterial leaf blight in paddy are observed in Kancheepuram, Tiruvarur and Nagapattinam districts.
Farmers are asked to spray a combination of streptomycin sulphate, tetracycline and copper oxychloride to combat the pest.
Spraying of fish oil resin soap 25 ml in a litre of water is suggested to combat the occurrence of mealy bug in tapioca and cocoa found in Kanyakumari.
Prevalence of red rot in sugarcane is found in Virudhunagar and Karur districts. Prophylactic treatment may be taken up by removing the affected plants and drenching them with carbendazin.
Setting up of yellow sticky traps to monitor thrips in paddy and aphids is suggested. Spraying of endosulfan, fenitrothion, or quinalphos is suggested as general insecticides.
Yellow mosaic virus can be controlled in Ramanathapuram district by spraying monocrotophos 200 ml an acre.
Setting up of yellow sticky traps has been suggested to combat the incidence of jassids in green gram that cross the ETL.
A combination of water and monocrotophos 10 ml is recommended to manage red palm weevil incidence in coconut.
Incidence of false smut incidence is noticed at the flowering stage in paddy in Tiruchi district.
The affected grains are converted into yellow colour smut balls. Hence, farmers are asked to spray propiconazole one gm in one litre of water.
Tanjore wilt in coconut is seen in Thanjavur. Farmers are asked to carry out root feeding of aureofungin-sol and copper sulphate in 100 ml water.
In Villupuram district, late leaf spot incidences are seen in groundnut.
Hence, farmers may spray carbendazim one gm in litre of water.
For details, contact Head, Department of Agricultural Entomology on 0422-6611214; or Head, Department of Plant Pathology on 0422-6611226.
Contact Head, Department of Agricultural Entomology on 0422-6611214