Am amintit de un studiu si de distanta intre plasa anti varoa si tavita de tabla.
Iata: http://www.countryrubes.com/images/AV-BOTTOM_BOARD.pdf
Conclusions, Recommendations and Perspectives
Recommendations
Based on the results obtained during the two years of trials, we are convinced that the anti-varroa
bottom board is a good means of slowing the progression of the varroa mite population in the
colonies. Our conclusion reinforces those of several other studies, which demonstrate the same
tendency. We therefore recommend its use within the Canadian context. The anti-varroa bottom
board should however be used with a closed bottom in order to not, contrary to the desired result,
encourage an accelerated increase in the varroa mite population which would follow a lowering of the
hive temperature. This word of caution is very important. The bottom must be closed by means of a
movable drawer that permits, at regular intervals, a cleaning of accumulated hive debris. This drawer
is also useful for sampling purposes. We also recommend that the distance between the bottom of
the sampling drawer and the screen be at least 4 cm (1 5/8”) to prevent the re-entry of the varroa
mites into the hive unless future studies prove that this distance can be reduced.
BUNKA scrie:Interesant ce zice aiciConclusions, Recommendations and Perspectives
Recommendations
Based on the results obtained during the two years of trials, we are convinced that the anti-varroa
bottom board is a good means of slowing the progression of the varroa mite population in the
colonies. Our conclusion reinforces those of several other studies, which demonstrate the same
tendency. We therefore recommend its use within the Canadian context. The anti-varroa bottom
board should however be used with a closed bottom in order to not, contrary to the desired result,
encourage an accelerated increase in the varroa mite population which would follow a lowering of the
hive temperature. This word of caution is very important. The bottom must be closed by means of a
movable drawer that permits, at regular intervals, a cleaning of accumulated hive debris. This drawer
is also useful for sampling purposes. We also recommend that the distance between the bottom of
the sampling drawer and the screen be at least 4 cm (1 5/8”) to prevent the re-entry of the varroa
mites into the hive unless future studies prove that this distance can be reduced.
...adica, trebuie folosita cu tavitza inchisa, iaca am mai invatzat ceva, pt ca tinand-o deschisa scade temperatura pe puiet si asta duce la o infestare mai usoara a puietului, probabil si la o lungire usoara a perioadei de incubare, si asta convine de minune parazitului, daca e inchisa treaba se schimba...asa cum din intamplare am tinut eu la deloni vara ce a trecut...tava inchisa, hofman de 32mm albina multa pe interval (noaptea)..ca ziua jumate era la cules
...stupul negru, hmmm...si la toate astea am mai si format 3 din ei cu cedare de culegatoare si 2 cu scuturare...deci nexam puiet, si cu toate astea tot am avut VSH in toamna...hmmm, pai la infestatii mai periculoase cred ca aveam un VSH superevident...vedem ce ne rezerva viitorul !
Si...distantza de 4cm intre sita si tava...da, nu am stiut !!
Mersi colega !!!!!!!!!!!
BCM scrie:Tot mi se pare mare distanta de 12mm care ramane la o cutie de 300x300mm cu 9 rame de 32mm. La o asezare simetrica a ramelor (2 randuri de albina intre faguri, pe 12mm) vor ramane cate 12mm de fiecare parte a fagurilor marginali la doaga. Cred ca e cam mult pentru o albina micsorata crescuta pe celula naturala. As merge cel mult pe 295x295mm la interiorul cutiei, pentru usurinta confectionarii.
Pun o foto cu cutia de 291x291mm la care sunt sigur ca si cu propolizare (nu prea au spatiu propolizat intre rame) am loc de miscare si de scoatere a ramelor daca se respecta intocmai dimensiunile ramelor si a cutiei.
danman scrie:Am folosit un asemenea fund. Problema este ca daca nu-l inchizi ermetic, albinele intra si someaza exact unde nu trebuie - in tavita. Asta ar fi anula orice efect de izolare a acarienilor cazuti, acestia putand urca din nou pe aceste albine. Daca-l inchizi ermetic pierzi ventilatia... e cu dus intors. Am renuntat la site din cauza asta si-am ramas cu fundurile pline.
Înapoi la INTRETINEREA ALBINELOR
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