Effect of duration of varieties, planting methods and levels of nitrogen on incidence of major moth borers in sugarcane
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Date
2018
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CCSHAU
Abstract
A 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).
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