Ahlawat, Dilbag SinghNaveen2018-08-302018-08-302018http://krishikosh.egranth.ac.in/handle/1/5810070169A field experiment was conducted at the farm of Regional Research Station, Uchani, Karnal, CCS Haryana Agricultural University, Hisar during 2017-2018 to evaluate the effect of planting methods and levels of nitrogen on the incidence of shoot borer, Chilo infuscatellus Snellen, top borer, Scirpophaga nivella Walker and stalk borer, Chilo auricilius Dudgeon in some sugarcane genotypes. Two planting methods i.e. paired row and conventional method with three doses of nitrogen, 150, 180 and 210 kg/ha were tested on three differently maturing sugarcane varieties CoH 160 (early maturing), CoH 167 (mid maturing) and CoH 150 (late maturing) to observe their effect on the incidence of major borer complex,yield and quality of sugarcane. The incidence of shoot borer was maximum (7.14, 12.03 and 5.37%) in CoH 160 and the minimum (3.45, 4.81 and 2.96%) in CoH 167 during April, May and June, 2017, respectively. Similarly, incidence of top borer was highest (8.66, 10.88 and 12.22%) in CoH 160 and lowest (3.55, 5.11 and 6.44%) in variety CoH 167 during July, August and September, respectively. The mean per cent incidence, per cent intensity and infestation index of stalk borer was recorded maximum (36.00, 16.22 and 5.96, respectively) in CoH 160 and minimum (29.55, 12.16 and 3.68, respectively) in CoH 150. Shoot borer incidence was minimum (3.94, 6.65 and 2.85%) at 150 kg N/ha and maximum (6.29, 9.32 and 4.76%) at 210 kg N/ha during April, May and June, respectively. Similarly, the lowest incidence (3.11, 5.55 and 6.66%) of top borer was observed at 150 kg N/ha and highest (9.11, 11.77 and 13.55%) at 210 kg N/ha during July, August and September, 2017 respectively. The stalk borer mean per cent incidence, per cent intensity and infestation index was recorded maximum (37.11, 15.32 and 5.81, respectively) at 210 kg N/ha and minimum (28.77, 12.80 and 3.70, respectively) at 150 kg N/ha. With the present findings, it can be concluded that with the increase in nitrogen dose there was increase in the incidence of all above mentioned borer pests. Incidence of shoot borer and top borer was not affected significantly with different planting methods while mean per cent incidence, per cent intensity and infestation index of stalk borer (35.11, 15.33 and 5.50, respectively) was significantly higher in paired row planting method as compared to conventional method of planting (30.44, 12.94 and 3.97, respectively). The variety CoH 150 gave the highest cane yield (81.75 t/ha), millable canes (100.31 thousand/ha). Maximum CCS per cent (11.78%) was obtained from variety CoH 167. Cane yield, number of canes and CCS was significantly higher (78.05 t/ha, 92.11 thousand/ha and 11.13%, respectively) in paired row planting method as compared to conventional method of planting (74.42 t/ha, 83.11 thousand/ha and 11.08%, respectively).ennullThesis