Best time and dosage for deworming sows, and how many days after deworming they can be mated

AbstractThe deworming times for sows are March, June, September and December. A highly safe deworming drug is ivermectin, which comes in two forms: powder and injection. The powder should be mixed into feed for 5-7 days, and 1.5 g of powder can be mixed into feed for oral administration per 10 kg. Ivermectin injection contains 10 mg of abamectin or ivermectin per milliliter; use 1.5 ml per 50 kg, then inject subcutaneously with a 12# short needle. About 5 days after deworming, they can be mated.

I. Deworming time and dosage for sows

1. Sows can be divided into deworming in March, July and November each year. If parasitic infection on the pig farm is relatively severe, then 1 additional deworming is needed, namely March, June, September and December.

2. When deworming sows, be sure to avoid the lactation period, while the empty period is relatively short. For convenience of operation, deworming is generally chosen during pregnancy. At present, the deworming drug widely recognized as highly safe and clearly effective is ivermectin.

3. Ivermectin comes in two forms: powder and injection. The former is administered by subcutaneous injection, while the latter is administered orally mixed into feed. Generally, the injection only needs 1 subcutaneous injection, because after the injection is given subcutaneously, it is not immediately absorbed by the body, but relies on the sustained-release effect of the drug adjuvant, maintaining a relatively high blood drug concentration within a few days, effectively eliminating adult worms and gradually developing eggs.

4. Ivermectin powder should be mixed into feed for 5-7 days, and the mechanism of effect is about the same. Each bag is 5 g and contains 10 mg of abamectin or ivermectin. According to the instructions, 1.5 g of powder can be mixed into feed for oral administration per 10 kg of body weight.

5. For subcutaneous injection in sows, a 12-15 mm long 12# short needle is needed. The 16# long needle commonly used for sows must not be used, otherwise it will be injected into the deep muscles of the sow and absorbed directly by capillaries, failing to achieve the sustained-release deworming effect.

6. Generally, ivermectin injection contains 10 mg of abamectin or ivermectin per milliliter; use 1.5 mg per 50 kg of body weight for subcutaneous injection.

7. Regularly deworm the body surface of the breeding pig herd. During this period, prepare an aqueous solution of amitraz or Chulailing, then use spraying to wet the body surface of the breeding pigs. This can be done 3-4 times per year.

8. Regular deworming of sows needs to be arranged 1-2 weeks before farrowing. This can effectively prevent sows from directly transmitting parasites to newborn piglets. If there are many parasites on the pig farm, the breeding pig herd can be dewormed in time, and then after an interval of 1-2 months, switch to regular deworming.

II. How many days after deworming sows can be mated

1. Generally, mating can be done after an interval of about 5 days. The appetite of mated sows will decline somewhat, so attention should be paid to appropriately reducing the feeding amount. If overfed, the intrauterine temperature of the sow will be significantly increased, causing reduced survival of fertilized eggs and lowering the number of piglets born per sow.

2. At the same time, it will also waste feed and increase breeding costs. Also pay attention to the mating time for first-time mated sows; it is generally suitable during the sow's 3rd estrus. If mated too early, it can easily cause stillbirth, miscarriage and various other adverse phenomena, thereby reducing the growth ability of piglets and resulting in poor breeding benefits.