1ere coupe : courte : 3,5 cm. Augmenter progressivement à 7,5 cm. Si la pelouse est faible : tondre à une hauteur de 7 à 10 cm. On peut tondre plus fréquemment car la pelouse pousse plus rapidement. Tondre à 7,5 cm tout l'été. Coupes moins fréquentes en périodes chaudes. En période de canicule, il ne faut pas couper plus court que prévu : 7,5 cm. Tondre jusqu'à ce que la température baisse et que l'herbe pousse moins rapidement. Diminuer alors la hauteur de tonte de 7,5 cm à 3,5 cm, jusqu'à l'arrêt de la croissance. On peut tondre plus fréquemment car la pelouse pousse plus rapidement.
Maison de ville (23' x 32') avec sous-sol aménagé, très bien entretenue. Les pièces sont vastes et les quatre chambres possèdent de grands rangements. Au rez-de-chaussée, la cuisine comprend un îlot déplaçable. Cet étage possède également une salle à manger, un grand salon et une salle d'eau. Au sous-sol, on retrouve une grande salle familiale, la quatrième chambre, deux rangements supplémentaires, un atelier ainsi que l'aspirateur central et l'échangeur d'air. Possibilité de convertir l'atelier en salle de bain.
The genus Centris contains circa 250 species of large apid bees occurring in the Neotropical and Nearctic regions, from Kansas to Argentina. Most females of these bees possess adaptations for carrying floral oils rather than (or in addition to) pollen or nectar. They visit mainly plants of the family Malpighiaceae to collect oil, but also Plantaginaceae, Calceolariaceae, Krameriaceae and others. Recent studies have shown they are sister to the corbiculate bees, the most well-known and economically important group of bees [1]

There is a size correlation which determines whether males become patrollers or hoverers. Patrollers tend to be larger so that they can better protect and copulate with emerging females. Smaller males are usually unable to compete as well, and so have to make the best out of a bad situation; thus, they become hoverers. Each group has a different set of behaviors. The patrollers move over a large space containing many other patrollers. Usually, patrollers will frequent the same spots over the course of their lives. Since the area is so large, the cost to defend it against other patrollers would be much greater than the potential mating benefits, so the patrollers show very little territoriality.[11] Patroller males will usually only fight when a breeding female is near. In contrast, each hoverer stakes out an area of about one meter in diameter. These areas don’t overlap with other hoverers. Any fast moving object (i.e. bee, dragonfly, leaf, etc.) that enters a territory will be quickly chased. The chase allows the male bee to determine if a female is unmated, or if an enemy male is in his territory. If it is a male bee, the territory owner will chase it out, but not beyond the boundary of the territory. What is interesting is that every day (or even every several hours) the territory holder will abandon the area to establish a new zone. Often the male will never return to the vacated area, and it will be taken over by another male. This shows that hoverers show a low site tendency but strong territoriality.[11] A balanced ratio of patrollers to hoverers is maintained, and thus, this ratio is an evolutionary stable strategy. If more males become patrollers, then the hoverers will benefit from the reduced competition, and the hoverers' genes will spread until the stable ratio is returned to. The same thing will happen if more males become hoverers. 

Pas nécessaire. Une pelouse à 7 cm n'a pas besoin d'arrosage avant la fin juin. S'il n'y a pas de pluie pendant 7 à 10 jours, arroser profondément. Si la pelouse a un aspect bleuté et qu'elle laisse des empreintes de pieds : elle commence à se faner. Elle entre en période de dormance : ne pas arroser, elle reviendra verte à l'automne. Si vous voulez la garder verte : arroser de 2 à 4 heures pour y laisser 2,5 à 5 cm d'eau. En cas de sécheresse, arroser régulièrement si possible, mais ne pas arroser l'après-midi ou par temps venteux à cause d'une perte en eau par évaporation. Évitez un arrosage léger de 15 minutes : il crée des racines superficielles qui n'ont pas accès à la couche d'eau du sous-sol. Sol sablonneux : arroser 2 fois par semaine. Pas d'arrosage, à moins que les pluies ne tardent à venir.


By submitting a comment, you accept that CBC has the right to reproduce and publish that comment in whole or in part, in any manner CBC chooses. Please note that CBC does not endorse the opinions expressed in comments. Comments on this story are moderated according to our Submission Guidelines. Comments are welcome while open. We reserve the right to close comments at any time.

Droit d'auteur : les textes sont disponibles sous licence Creative Commons attribution, partage dans les mêmes conditions ; d’autres conditions peuvent s’appliquer. Voyez les conditions d’utilisation pour plus de détails, ainsi que les crédits graphiques. En cas de réutilisation des textes de cette page, voyez comment citer les auteurs et mentionner la licence.


Aéronautique Agriculture Agroalimentaire Alcool Armement Automobile Biotechnologie Bois Carte de paiement Chimique Cinéma Construction Culturelle Défense Électronique Semi-conducteur Finance Immobilier Information Logicielle Jeu vidéo Mécanique Métallurgie Minière Musique Papetière Pêche Pétrolière Pharmaceutique Plastique Santé Sécurité Spectacle Sexe Sidérurgie Spatiale Sport Tabac Textile Tourisme

Four varieties of bacteria have been found in the bee bread of the larva: Bacillus circulans, B. coagulans, B. firmus, and B. megaterium. Only the Bacillus genus has been found in the samples taken. Together, these four species were able to hydrolyze starch, ferment glucose, convert nitrates to nitrites, and produce dihydroxyacetone from glycerol. This group of bacteria also lowers the pH of the bee bread. These functions serve not only to protect the larva from other bacteria, but they also digest complex molecules which allow the larva to easily absorb nutrients without expending a lot of energy. The bacteria, in turn, receive a supply of food which results in a mutualistic relationship.[13]


Male C. pallida are able detect the pheromones which females release and use them to locate female burrows. When a virgin female is about to emerge from her burrow, she releases a scent that wafts up through the soil and is detected by the antenna of the males. This has led to males developing a very acute olfactory sense. Freshly-killed females have been buried to test whether sound also plays a part in male signaling. In these tests, male bees still dug up the dead females, proving that pheromone signaling is the only pathway. Males have also been observed to dig up other males. This shows that males and virgin females give off similar pheromones. Oddly, males also sometimes dig up other digger bee species. It is currently unknown why this occurs.[6]
×