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<p>Validation of hygienic <em>Apis mellifera </em>L. colonies against <em>Varroa </em><em>destructor </em>Anderson and Trueman infestation</p>

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Title Statement <p>Validation of hygienic <em>Apis mellifera </em>L. colonies against <em>Varroa </em><em>destructor </em>Anderson and Trueman infestation</p>
 
Added Entry - Uncontrolled Name Mohindru, Bharathi
Chhuneja, Pardeep K
Singh, Jaspal
 
Uncontrolled Index Term European\Western honey bee; Bee colony; Brood cells; Mite resistance
 
Summary, etc. <em>Varroa destructor</em> is a major bee parasitic mite causing huge losses to <em>Apis mellifera</em> colonies worldwide. Apart from various chemical based strategies, hygienic behaviour is an important ecological <em>Varroa </em>management strategy. This trait plays an important role in imparting the colony resistance against the <br /> <em>V. destructor.</em> Here, we assessed the colony level hygienic behaviour of 100 colonies using pin-killed brood method and from these 100 colonies, ten colonies (7 hygienic and 3 non-hygienic) were validated against <em>V. destructor</em> infestation for two seasons, autumn and spring. The worker larval brood near capping stage was inoculated with <em>Varroa</em> mite. In total, 21 inoculations were made in every test colony and replicated thrice. The observations were recorded at every 2 h interval till complete removal of mite. During the autumn season, in the 7 hygienic colonies, the mean of <em>Varroa</em> mite inoculated brood cells emptied after 2, 4 and 6 h was 1.36±0.11, 3.17±0.10 and 5.66±0.68%, and while in the non-hygienic colonies, it was 0±0.00, 0.52±0.10 and 2.11±0.53%, respectively. After 24 h a mean of 93.43±2.43% of brood cells were emptied in the hygienic colonies, while in the non-hygienic colonies, it was only 61.90±4.59%. During the spring season, in the hygienic colonies, mean mite inoculated brood cells emptied after 2, 4 and 6 h were 3.62±1.24, 6.57±0.73 and 7.25±0.47%, respectively while in the non-hygienic colonies the mean was 0±0.00%, 1.57±0.00 and 2.11±0.53%. After 24 h, it was 96.83±1.86% and 77.25±0.53% in the hygienic and non-hygienic colonies, respectively. In the autumn season, the hygienic colonies on an average took 28 h, whereas non-hygienic colonies took 50.67 h to achieve 100% uncapping and cleaning of cells. On the contrary, the hygienic colonies on an average took 25.71 h, whereas non-hygienic colonies took 47.36 h to achieve the same in the spring season. Hence, the hygienic behaviour can contribute to the colony’s resistance towards <em>V</em>.<em> destructor</em> mite inoculation in capped brood cells and result in reduced use of chemicals into the honey bee colonies.
 
Publication, Distribution, Etc. Indian Journal of Experimental Biology (IJEB)
2020-08-31 00:00:00
 
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http://op.niscair.res.in/index.php/IJEB/article/view/39924
 
Data Source Entry Indian Journal of Experimental Biology (IJEB); ##issue.vol## 58, ##issue.no## 9 (2020): IJEB [September 2020]
 
Language Note en