When to release bears, generally speaking, the best time for bumblebees to enter the shed is about 5%- 15%. Because it takes 10 weeks for bumblebees to hatch into finished bees, in order not to affect the normal pollination demand of crops, it is recommended to book them 1-2 weeks in advance.
Pay attention to the installation or inspection of insect nets, try to install insect nets (40 mesh) before the hive enters the shed, and check whether the insect nets are damaged and repair them in time to prevent bumblebees from flying away after entering the shed.
Spraying highly toxic pesticides is prohibited. During the planting process, it is not allowed to apply, spray or fumigate pesticides with high toxicity, high internal absorption and high residue, such as phoxim, phorate, terbutamol, imidacloprid, beta-cypermethrin, chlorpyrifos, 1605, methamidophos, omethoate, smoke agent and emulsifiable concentrate.
Can bumblebees be used to pollinate many crops planted in the same greenhouse? It is suggested that multiple crops bloom in the same shed at the same time. In order to avoid cross pollination, bumblebees are not recommended.
Can the same crop and different greenhouses use the same beehive? It is generally recommended to use the same beehive in the same greenhouse, and it is not recommended to move the beehive frequently. Reason: Frequent moving of beehives prolongs the adaptation time of bumblebees to the environment, which is not conducive to bumblebees pollination. Too frequent will annoy bumblebees, leading to poor pollination effect or bee attack.
Advantages of bumblebee pollination
1, the efficiency of visiting flowers in Xiong Wei is good, about 20 flowers per minute; Bees visit about 5 flowers every minute.
2. The bear's nest is more than twice the size of a bee, covered with fluff, and its powder collection is more than four times that of a bee.
3. When picking flowers, the bear will rotate 360 degrees on the flowers, and pollination can be completed by visiting the flowers once; But bees only stay on one side of the flower, and it usually takes three times to complete pollination.
4. When the temperature is above 8℃, bears can go out to enjoy flowers, and they can also go out to enjoy flowers on cloudy days; But bees leave their nests to visit flowers above 16℃, and do not visit flowers on cloudy days.
5. The fruit type pollinated by Xiong Feng is rounder and bigger, which can significantly improve the income of 1-2 stubble fruit.
6. Bears visiting flowers are curves, while bees are straight lines, which can bring more cross-pollination opportunities, thus ensuring better fruit setting rate.
7. Bears are collected from nests; After leaving the nest, bees collect water, honey, powder and flight test respectively, and only 4% bees are engaged in powder collection.
8. Bears don't need to be kept; And bees need to be kept.