000			02454nam a2200217 4500
003			OSt
005			20250207163653.0
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040			_cUAS Dharwad
041			_aEnglish
082			_a595.7 _bMAM
100			_aMamatha V. V.
245			_aStatus of Mirid Bugs in Cotton and their Management
250			_aM.Sc. (Agri)
260			_aDharwad _bUniversity of Agricultural Sciences _c2024
300			_a137 _c32 Cms
520			_aABSTRACT Mirid bugs are prominant pests of cotton presently. The substantial symptoms and damage inflicted by mirid bugs lead to significant economic losses to the cotton crop. Higher infestation of mirid bugs with 5.10 bugs/5 squares and square shedding (1.90 squares/plant), boll shedding (1.54 bolls /plant), parrot beaked boll (3.14 bolls/plant) and boll with scar (4.37 bolls /plant) were observed in fields at Haveri district during a survey conducted in 2023. In Dharwad district the incidence of mirid bugs was 3.88 bugs/5 squares with (1.02) shedding of squares. Ten different Bt and non Bt cotton cultivars were studied for infestation pattern and damage by mirid bugs through a field study at MARS, Dharwad during 2023. The incidence of mirid bug was noticed from September II FN and gradually increased in October and peak incidence was noticed in the II FN of November in all genotypes except DDhC-11 and DLSa – 17 N Bt. The highest infestation was observed in November II in DHH-11 non Bt (14.21 bugs/10 squares) leading to 19.68 per cent square shedding. Suvin non-Bt had lowest (6.00 bugs/10 squares) incidence 9.04 per cent square shedding. NBC -3 Bt had higher yields (19.21 q/ha) in unprotected condition. Among eleven different insecticides tested in field bio-efficacy against mirid bugs at MARS Dharwad (2023) Acephate 50 + Bifenthrin 10 WDG @ 1.0 g/l found to be highly effective with only 2.56 bugs/10 squares of mirids and least shedding (2.42%) of squares and (5.59%) boll damage. The seed cotton yield in this treatment was 2.91 q/ha with 2.91 B:C ratio. Other insecticides with good bio-effecicay were Fipronil 5 SC, Fipronil 4 + Acetamiprid 4 SC, Acephate 75 SP, Profenophos 50 EC and Profenophos 40 + Fenpyroximate 2.5 SC in the order with B:C ratio of 2.87, 2.83, 2.72, 2.69 and 2.63, respectively.
650			_aAgricultural Entomology
700			_aUdikeri S. S.
942			_cTH _eM.Sc. (Agri) _h595.7 _kMAM _n0 _6595_700000000000000
999			_c70810 _d70810