5.2. Phong benh
Theo cac nha khoa hoc, de phong benh san la da co cho gia sue nhai lai, cdn ap dung bien phap phong trir tong hop bao g6m: dinh ky t£y san la da co cho gia sue nhai lai, u phan diet trumg san la da co, diet ky chu trung gian, tang cudng cham soc nuOi dudng gia sue d6 nang cao sue de khang.
- Tay san la da co cho gia sue nhai lai
Gia sue nhai lai nhiem san la da co vdi ty le cao, ph6 bi£n 6 cac vung, nhiem quanh nam va d moi lira tuoi. Do do, phai dinh ky tiy san la da co cho gia sue nhai lai d cac lura tuoi.
Theo Trdn Ngoc Thang (2004), trau, bd cai sinh san va be, nghe lam giong cdn tdy san la da co 2 ldn/nam (thang 4 - 5 va thang 10 - 11), trau, bo thit tdy 1 ldn/nam vao thang 11- 12. Dac biet, khi trau, bo ia chay keo dai, kiem tra phan tha'y co 50 trung/gam phan cdn dung thudc tdy ngay. Tac gia cung khuyen cao rang, nen dung Benzimidazole lieu 10 mg/kgTT hoac h6n hop Okazan - Levamisole lieu cao (Okazan: 15 mg/kgTT, Levamisole: 8 mg/kgTT) de tdy san la da dinh ky cho trau, bo.
- Diet trung san la da co trong phan bang phuang phap u nhiet sinh hoc.
De han che trung san la da co phat tan ra moi trudng, cac trang trai va cac ho chan nuoi gia sue nhai lai cdn co hd u phan trong khu vuc chuong nuoi. Tron phan vdi tro bep, la xanh, voi bot roi u trong hd co the tich ldn (tren 1 m3), tren be mat trat bun ddy tdi thieu 5 cm de dam bao su sinh nhiet trong ho u. Co the u noi tren mat ddt, song dung tich ddng u phai du ldn (day dong ii co dudng kinh toi thieu la 1,5 m, ddng u hinh chop, cao toi thieu 1 m).
- Diet vat chu trung gian cua san la da co
Thiet ke he thong tudi tieu hop ly nhdm dam bao dong co luon kho rao, san ldp vung nude de cac loai oc khdng co dieu kien ton tai va phat trien. Tren nhiing canh ddng co ruong nude, co the nudi vit, ngan, ngdng va tha ca de diet oc - vat chu trung gian cua san la da co.
- Tang cudng bien phap quan ly chan tha, ve sinh chuong trai va cham soc nudi dudng gia sue nhai lai.
Nhirng trang trai chan nudi gia sue nhai lai d cac dia phuong co bai chan rong cdn ap dung bien phap chan tha luan phien.
Cac ho chan nudi phai duoc tuyen truyen, tap hudn kien thurc ve benh san la da co de lua chon va biet each ap dung bien phap phong benh phu hop.
Tang cudng ve sinh chuong trai, chu y khau phdn va che do dinh dudng cho gia sue nhai lai, dac biet la trong thdi ky mang thai, dong due va cho con bu nhdm nang cao sure de khang ciia chung vdi benh ky sinh triing noi chung va benh san la da co noi rieng.
TAI LIEU THAM KHAO CHUONG 7 (BENH SAN LA DA CO)
* Tieng Viet
1. Pham Van Khud va Phan Luc (1996), Ky sinh trung thu y, Nha xua't ban nong nghiep, Ha NOi, Tr. 68 - 70.