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Population Dynamics Of Insect Pests Of RABI Sorghum And Their Management Through Eco-friendly Approaches | 107188
ISSN: 2329-8863
Advances in Crop Science and Technology
Open Access
Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.
Sorghum (Sorghum bicolor (L.) Moench) is one of the most important cereal crops in the semi-arid tropics. India
contributes about 16% of the world???s sorghum production. In Karnataka major area under cultivation is in the Northern
dry zone of Karnataka. The production in these zone is affected by a wide array of biotic constraints, of which insect pests
are major once. As many as 150 species of insects have been recorded as pests of sorghum from emergence to late grain
filling stage. Among them sorghum shoot fly, (Atherigona varia soccata Rondani), stem borer (Chilo partellus), sugarcane
aphid [Melanaphis sachari (Zehntner)],Shoot bug or plant hopper (Peregrinus maidis Ashmead and head bug (Calocoris
angustatus) are major once and is reflected in low grain yields with avoidable losses ranging from 12 to 83%. In the present
investigation the efforts were made from 2008-09 to 2016-17 to know the pest dynamics on the crops over the years, Data
clearly indicated that shoot fly incidence was ranged from 2 to 51% with maximum during 2013-14. Stem borer incidence
is increasing trend, which was 2-6% in 2008-09 compared to 2016-17 season (1.76 - 10.34%.). Aphid (1- 9 grade) and shoot
bug (15-80 bugs/pl) incidence was highly variable depending upon the temperature and amount of rainfall received during
the cropping season. Further different integrated pest management module were framed and evaluated against the major
pests of rabi sorghum. Pooled data of two years revealed that shoot fly and stem borer dead heart as well as shoot bug
incidence was did not differ significantly among the modules. The cost economics data indicated that module comprising
of Seed treatment with Biofertlizers (Trichoderma+ PSB + Azospirillium)+ Btk @ 2g/lt at 25 DAE -Spray of Lecanicillium
lecani @ 2ml/l at 45DAE recorded highest net profit (Rs. 29584/ha ) with highest Benefit cost ratio of 2.46