Under the trade name Delnav, it can be used to control insects and mites on apples, pears, quince, grapes, and walnuts, and finds use in the control of ticks, horn flies, lice and sheep keds in various livestock, either as a spray or as a dip.
On average, the gestation period or length-of-pregnancy of a cow is 285 days long. This is similar to the pregnancy period of a woman, which is closer to around 9 months or ~260 days. However, actual gestation period of a cow can range from 270 days to 295 days, depending primarily on breed[s], age, body condition and nutritional health. Length of gestation is primarily an inherited trait, but has nothing to do with the rate of maturity of a certain breed or an individual animal.
1 In comparing the gestation periods of the above cows with the gestation periods of the calves they produced, it was found that four of the eleven eases showed a decided tendency for the calves of a cow to have gestation periods similar in length to her own. 6. 2  The least variation in length of gestation observed for 29 cows that had each produced six or more calves was six days. 3  The greatest variation was 20 days. 4  The length of gestation periods of some cows were quite uniform, while others varied widely.