In southern Ontario flowering starts late February based on the weather conditions. Typically, female flowers become receptive before catkins release pollen and stay receptive for up to two months if they do not receive compatible pollen. We recorded flowering time and stages of flowering in our ...
RELATIONSHIPS BETWEEN FLOWERING PLANTS AND FOUR SPECIES OFBOMBUS(HYMENOPTERA: APIDAE) IN SOUTHERN ONTARIO An attraction to certain plant species byBombus terricola,B.bimaculatus,B.perplexus, andB.ternariuswas observed. The gathering of pollen was observed as a behavioural act distinct from nectar gather...
To model the spring thaw-freeze and its magnitude or intensity, we proposed an indicator based on the accumulation of daily minimum temperature between successive freezing dates and its maximum value over the spring. This indicator was tested on apple and peach production in southern Ontario, ...