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Incidence of varroa destructor anderson and trueman (Acari: Varroidae) and its management in apis mellifera L. colonies

KrishiKosh

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Title Incidence of varroa destructor anderson and trueman (Acari: Varroidae) and its management in apis mellifera L. colonies
 
Creator Asha
 
Contributor Gulati, Rachna
 
Subject Onions, Roses, Exports, Markets, Marketing, Productivity, Economics, Area, Grading, Crops
 
Description Studies on seasonal incidence of V. destructor in A. mellifera colonies
revealed two peaks in its population, one in second fortnight of May (63.27
mites/hive) and second in first fortnight of July (34.75 mites/hive). Mite fall on
sticky paper and hive debris was more in warmer months (May to August) than
in colder months (November to January). Between the two methods of sampling,
sticky paper method was found significantly better (CD = 0.11; p = 0.05) as
more number of mites (17.58 mites/hive) were recorded than in hive debris
sampling (11.41 mites/hive). Among abiotic factors, the mite population was
significantly positively correlated with the maximum and minimum
temperature. Maximum numbers of brood cells (15-17%) and adult bees (8-9%)
were infested with V. destructor in second fortnight of May. Mite infestation
showed a significant positive correlation with perforation of brood (r = 0.65;
0.83) and bee deformity (r = 0.97; 0.81) in both the sampling methods and
negative correlation with colony strength and stores. The decreasing order
efficacy of the various treatment against V. destructor is screen floor (98.8%)>
powdered sugar(3g/ frame) (97.7%)> oxalic acid (3% top bar method) (88.2%)>
powdered sugar(2g/ frame) (87.2%)> sulphur dusting (200g/ hive) (85.7%)>
mustard stem powder (5g/ hive) (77.9%)> oxalic acid (3% trickling method)
(76.3%)> oxalic acid (3% cotton swab method) (75%)> formic acid 85% (71.7)>
mustard stem ash (5g/ hive) (69.8%).
 
Date 2016-11-16T10:26:56Z
2016-11-16T10:26:56Z
2009
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/85781
 
Language en
 
Format application/pdf
 
Publisher CCSHAU