Effect of nitrogen and potash on major borer pest incidence in differently maturing varieties of sugarcane
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Date
2016
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Publisher
CCSHAU
Abstract
Field experiment to evaluate the effect of nitrogen and potash on the incidence of shoot borer,
Chilo infuscatellus Snellen, top borer, Scirpophaga excerptalis Walker and stalk borer, Chilo auricilius
Dudgeon in some sugarcane varieties was conducted at the farm of Regional Research Station, Uchani,
Karnal, CCS Haryana Agricultural University, Hisar during 2015-16 crop season. Three doses of
nitrogen, 150, 200, 250 kg/ha and two doses of potash 0 and 50 kg/ha were tested on three differently
maturing varieties of sugarcane Co 0238, CoH 119 and CoH 150 to see their effect on incidence of
borer pest, yield and quality of sugarcane. Incidence of early shoot borer was highest (7.68, 12.19 and
6.35%) in Co 0238 and the lowest (5.16, 8.51 and 5.40%) in CoH 119 during April, May and June,
2015, respectively. Similarly, the maximum incidence of top borer (9.11, 11.78 and 13.56%) was
recorded in Co 0238 and minimum (6.22, 7.56 and 10.67%) in CoH 119 during July, August and
September, respectively. The stalk borer mean per cent incidence, per cent intensity and infestation
index was highest (49.56, 16.12 and 8.11, respectively) in Co 0238 and lowest (33.22, 12.48 and 4.18,
respectively) in CoH 150. Early shoot borer incidence was highest (7.12, 11.19 and 6.48%) at 250 kg
N/ha and lowest (5.68, 8.57 and 5.23%) at 150 kg N/ha during April, May and June, respectively.
Similarly, the highest incidence of top borer (9.11, 11.56 and 14.44%) was recorded at 250 kg N/ha and
the lowest (5.78, 7.78 and 9.56%) at 150 kg N/ha during July, August and September, 2015,
respectively. The maximum mean per cent incidence, per cent intensity and infestation index (45.44,
15.65 and 7.27, respectively) of stalk borer was recorded at 250 kg N/ha and the minimum (34.44,
13.28 and 4.60, respectively) at 150 kg N/ha. The present findings revealed that with the increase in
Nitrogen doses, there was an increase in all above three borer pest incidence. The application of potash
at 50kg/ha was very effective in providing resistance against all the three borers. The variety CoH 119
(mid maturing) resulted in highest cane yield (87.72 t/ha), number of millable canes (102.68
thousand/ha) and commercial cane sugar (12.60%) at 200 kg N/ha, respectively. Cane yield, number of
millable canes and commercial cane sugar was significantly higher (79.57 t/ha, 92.68 thousand/ha and
11.54%, respectively) at 50 kg K2O/ha than at no potash (76.36 t/ha, 89.97 thousand/ha and 11.07%,
respectively).
Description
Keywords
Nitrogen, Potash, Borer, Incidence, Chilo auricilius, Chilo infuscatellus, Scirpophaga excerptalis, Yield, CCS per cent, Effect, Sugarcane, Variety