Influence of Seed Treatment of Neem Based Formulations and Chemical on Populations of Cereal Cyst Nematode, Heterodera avenae Infecting Wheat and Barley

Cereal cyst nematode, Heterodera avenae is a serious pest of wheat and barley. To combat this disease, six treatments were undertaken i.e. seed treatment with neem based formulations (Neem seed kernel power (NSKP) v/w 10% -Neemark v/w- 10%, Neem oil- 10 mi/kg seed) and chemicals i.e. seed soaking (Carbosulfan 25 EC-2%) along with treated check (carbofuran 3G @1.5 kg ai/ha) and untreated control (Farmer's practice). It was found that the grain yield of wheat was maximum with carbosulfan treatment (40.3 q/ha) followed by the neem seed kernel powder (38.0q/ha), neemark (32.7 q/ha) and neem oil (30.7 q/ha) as compared to farmers practice (18.6 q/ha). The number of cysts per 200 c/c soil were recorded in carbosulfan (18.6) that is at par with NSKP (19.0) followed by neemark (21.6), neem oil (31.0) and L untreated check (43.3). All the treatments were showed significantly higher grain yield and reduced number of CCN counts per 200 cc soil over untreated check. In barley crop, the grain yield of RD-2035 was highest 48.7 q/ha followed by carbofuran 3G @ 1.0 kg ai/ha (36.1q/ha) and Neem oil + vermicompost 33.0 q/ha) as compared to susceptible check (16.4 q/ha). The nematode cyst counts per 200cc of soil reduced in resistant variety (7.6) followed by carbofuran (10.0), neem oil + vermicompost (14.6) as compared to farmers practice (32.3).