Diffis, pastures, hardcore, hardcore,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

There is a fly that is closely related to the cattle industry, which is known for its ability to cause huge economic losses and dissemination of disease. It is a fly. Flights are a world-wide public hazard, in North America, and fly is one of the most destructive fly species of cattle. During 2005-2009, in order of the fly, the US Nursing industry has caused an average annual loss of $ 2.2 billion per year, but the annual economic loss estimate is $ 360 million in the dairy industry. The resulting economic losses include the reduction in milk production and reduction in body gain, and also include the cost of fly-free measures. The fly flies are similar to the body flies and flies. No matter the male and female, there is a insectapper that can pierce the skin and blood vessels, and the bite is only blood. Unlike other suction F insects, there is no anesthetic in the saliva of the culvert, so its bite will only cause considerable stimulation to the cattle. It is generally believed that the bite of cows on the bite of the cattle led to a huge cause of cows only losing production capacity, but the relationship between the special escape behavior between the cost and the cow has not been determined yet. Schwinghammer et al. (1986b) found that cattle is compared with 25 to 50 cows invaded by cows, breathing is more urgent, and the heartbeat is faster. At present, there is generally believed that the fly is a mechanical carrier of a variety of major livestock disease pathogens. It is currently known that it can mechanically carry pathogens include Sinai river virus, cow vermigry virus and eds. Bulliviral Diarrhea (BVD) is a disease that is complex in the production of ranches. Through the study of BVD, the BVD virus can be carried by the BVD virus for 96 hours after the bullish bullish bullish. Flights may also involve Carrying the Rigte split valley thermal virus. It is a kind of human livestock, which has caused attention to the outbreak of livestock and people in Africa. The seasonal climate has greatly affected the quantity of the, in which the temperature is the most important climate variable that determines the number of. Berry and Campbell (1985) were observed that the bite rates of the livestock were closely related to the weather conditions, which decreased as the wind and sun radiation increased. Mullens and Peterson (2005) found that the increase in rainfall in March will result in an increase in the number of frs in May and June. Observing the number of 螫 in the Canadian pasture, can be able to spend the number of fans in the pastureThe amount significantly affects the number of flyces in the pasture. The number of winter insects depends on whether there is an appropriate habitat, and is also affected by the raising environment. For example, the cockroaches of the fly can be homogeneous in the feces and silage. Fly flies are a fly that is commonly distributed around the world. It is a kind of fly that can cause maximum economic damage to the milk and meat cattle. The loss estimated value of the corner flies on the US milk and beef cattle will reach $ 1 billion per year. The losses caused by the coroned flies on animal husbandry include reduced weight, and the amount of milk produced and destroyed only. Since the pests of the coroned flies are specially biting livestock with blood, they believe that the loss caused by bite is only caused by cows. Pain and mental stress. In the experiment of angular fly, it is only compared with only 100 cows invaded by the cornea, only 100 to 500 corneas are affected by the bulls, and only the physiological stress response is increased. As compared with the zero fly invaded, the cows affected by 100 to 500 corneas have only high momentum rate and respiratory rate, and the concentration of adrenocortic hormone in the F blood is also high. The corner flies can also spread to bovine or spread between cows, thereby having a negative impact on the health and production capacity of cattle. The corona can carry and disseminate a pathogen of various livestock diseases, including a common pathogens of benest disease, pseudo-tuning rodto, and a common pathogen that causes milk cow breastfur. As mentioned earlier, the adult insects of the coroned flies are specifically sustain cattle, and their blood is not large, but they will eat many times a day. The adultaus of the corona is small, and their dark black body is typically less than 5 mm, and the head is a mouthpiece like a bayonet. Most of the fly harm in a life of the corona spended through its host animals, only when you look for other hosts. The blood is the essential food of the coroned flies, so the animal can accommodate a high-density corner fling, at the peak period, the average annihole is easy to collect 200 corneas. Like other fly, the impact of weather factors on the corps larvae determines the density of each seasonal fly, while the corona adult will be affected by weather factors such as rainfall, temperature and relative humidity. Adult corner flies can migrate a few kilometers to find hosts, but the corona in the ranch is a large part of the local fields developed in the manure in the local field, and only a small part is from the outside.
螫 螫 螫, corner, cow comfort, cows production milk

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