Evaluation of Eco-Friendly Modules Against Shoot Borers of Sorghum [Sorghum bicolor (L.) Moench]
Loading...
Date
2005
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
MPUAT, Udaipur
Abstract
The investigation carried out on “Evaluation of eco-friendly modules against shoot borers in sorghum [Sorghum bicolor (L.) Moench]” during 2001 and 2002 revealed that the incidence of shoot fly, Atherigona soccata Rondani initiated in the 4th week of July and reached at its peak in the 3rd week of August with 48.40 and 39.67 per cent mean dead hearts during the year 2001 & 2002, respectively. The incidence of stem borer, Chilo partellus (Swinhoe) in terms of leaf injury initiated in the last week of July and touched its peak in second week of September with 34.43 and 29.77 per cent during 2001 and 2002, respectively.
The stem borer dead heart formation was started in the first week of August. The highest incidence was observed in the first week of September with mean dead hearts of 13.36 and 10.07 per cent during the year 2001 & 2002, respectively.
The investigations on the estimation of losses due to shoot borers reveal that infestation of shoot borers in sorghum on an average caused of 10.78 and 11.06; 20.05 and 16.47; 24.45 and 20.15; 15.37 and 15.84 per cent reduction in plant height, panicle length, number of spikelets/lpanicle and weight of 1000-grains, during 2001 and 2002, respectively. The shoot borers viz., shootfly, A. soccata & stem borer, C. partellus caused 39.49 and 38.09 per cent loss in grain yield equivalent to a loss of 11.58 and 14.54 q/ha during the year 2001 and 2002, respectively.
The sowing dates and varieties/hybrids had significant effects on shoot fly and stem borer infestation and grain yield of sorghum. The lowest infestation of shootfly with mean dead hearts of 51.34 and 41.85 per cent, stem borer with 23.48 and 20.46 per cent mean leaf injury and 15.50 and 11.58 per cent mean dead hearts and highest grain yield of 28.54 and 29.29 q/h were recorded in the crop sown on 9th July during 2001 and 2002, respectively. The shoot fly dead hearts, stem borer leaf injury and dead hearts in 30th July sown crop increased to the extent of 81.60, 66.88; 35.76, 32.14 and 24.20, 21.13 per cent during 2001 and 2002, respectively.
Among the different eco-friendly IPM modules, the module comprising of sowing of seed treated with imidacloprid followed by endosulfan spray at 7 and 30 DAG (M4) was superior which exhibited the lowest shoot fly, A. soccata incidence in terms of dead hearts (6.08 and 5.05%; 2001 and 2002), stem borer, C. partellus infestation viz., leaf injury (35.98 and 21.35%), and dead hearts (6.66 and 2.44%) and highest grain- yield (39.82 and 41.67 q/ha). The highest net return (Rs.13570 per hectare) and cost benefit ratio (1:3.14 and 1:2.87; 2001 and 2002) was also recorded in this module. The eco friendly IPM module comprising of sowing of seed treated with imidacloprid followed by spray of NSKE at 7 and 30 DAG (M1) and soil application of carbofuran followed by endosulfan spray (M5) at 7 and 30 DAG were at par with the above referred IPM module in terms of stem borer leaf injury, dead hearts and grain yield.
Description
Evaluation of Eco-Friendly Modules Against Shoot Borers of Sorghum [Sorghum bicolor (L.) Moench]
Keywords
null
Citation
Paliwal and Ameta, 2005