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Quantitative and qualitative losses due to tyrophagus putrescentiae schrank (Acari: Acaridae) in wheat and its management

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Title Quantitative and qualitative losses due to tyrophagus putrescentiae schrank (Acari: Acaridae) in wheat and its management
 
Creator Arvind
 
Contributor Gulati, Rachna
 
Subject Biochemical composition, Botanicals, Germination, Tyrophagus putrescentiae, Weight loss, Wheat
 
Description The studies on quantitative and qualitative losses due to Tyrophagus putrescentiae infestation
in wheat grains/flour revealed Amongst the two, wheat flour was found significantly better as
more number of mites (2517.73 mobile stages and 1742.73 eggs/ 100g flour) was recorded
than on wheat grains (643.16 mites and519.87 eggs/ 100g grain). Irrespective of the form of
wheat, maximum number of mites (3605.53 mites/ 100 g wheat) was witnessed at 180 days
which showed significant difference with mite numbers at other observation periods. Percent
weight loss was significantly more (1.92%) on wheat flour, as compared to wheat grain
(0.73%) showing highly significant positive correlation with T. putrescentiae population in
grains (r= 0.98) and flour (r= 0.94). Qualitative estimation of infested grains and flour
revealed the decrease in total soluble sugars (60.60, 54.71mg/1g), non reducing sugars (32.95,
24.97 mg/1g) and starch (367.35, 322.72mg/1g) after 180 days of infestation, respectively as
compared to 67.16, 43.06 and 444.18 mg/1 g at 0 day; depicting significant negative
correlation. However, the reducing sugars exhibited a significant increase from24.10 to 27.65,
29.74 mg/1g at 180 days of mite exposure in wheat grains and flour, respectively when
subjected to initial count of 100 mite pairs, showing significant positive correlation. A
significant positive correlation (r= 0.91) was recorded between protein content and mite
population in wheat flour. Percent loss in wheat germination due to T. putrescentiae
population at different durations was recorded as 4.67, 38, 60 and 77.34 percent after 0, 30, 90
and 180 days. Higher concentrations (2 and 1%) of leaf powder of Withania somnifera,
Pongamia pinnata and Azadirachta indica in wheat grains caused 100 percent mortality in T.
putrescentiae after 45 days post treatment.
 
Date 2016-09-21T13:47:27Z
2016-09-21T13:47:27Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/78020
 
Language en
 
Format application/pdf
 
Publisher CCSHAU