Parasite Patrol Parasite Patrol Get your cattle off to a clean start this grazing season.
ﬂ y control. To control horn ﬂ ies until
relatively free of internal parasites. (Ostertagia ostertagi) is the one that
they are very effective for lice control.
Veterinarian Dee Whittier recommends this
graze “parasite-safe” pastures for 90
program for spring-calving beef herds in his
x Deworm calves at midsummer (July 4 in Vir-
price of parasite control attractive for
many producers. “I believe that it’s
Deworm calves at weaning and place them
in clean pastures (regrowth of a hayﬁ eld) or
x Deworm grazing replacement heifers with
sequential treatments in the spring.
country. To plan a speciﬁ c program that
gives your calves 90 days of parasite-safe
carcass characteristics across the board.
of spring grazing. If the cows weren’t
grazing, discuss strategic deworming with
control cattle that were never dewormed.
dewormed the previous fall or winter (or
your veterinarian or Extension livestock
cattle strategically dewormed in pastures
Cattle that were not dewormed on pasture
and at feedlot entry averaged higher daily
but were treated at feedlot entry averaged
gains, higher dressing percentages, better
yield grades and larger ribeye areas, and a
larvae will overwinter, and adult cattle
that strategically deworming steers during
will acquire parasite infections as they graze. To decrease the level of pasture contamination in situations where cows and calves will be grazing together, the adult cattle should be dewormed about six weeks after turnout.
in spring (at around 200 lb.), they also acquire infective larvae and start contributing to pasture contamination about four weeks later. As part of a strategic program, a dewormer should be administered when the internal parasites the young calves have acquired start to shed viable eggs. Additional dewormer medications will need to be administered when the pasture is potentially contaminated within the 90-day period, Step says.
once considered a prob-lem for cattle in warm, wet areas such as Florida, the Gulf Coast and the Paciﬁ c North-west. But, cattle have traveled widely from those hot spots, and ﬂ ukes have hitched rides in in-fected animals. Most of the out-breaks in new areas are associ-ated with stocker calves from the Northwest and Gulf Coast or with dairy replacement heifers from Florida.
found in 24 states. As ﬂ ukes have spread, liver condemna-tions at harvest have become a major economic loss for the beef industry.
eggs through their manure. Lym-naeid snails, a freshwater variety, are intermediate hosts for liver ﬂ ukes. These small snails live in muddy areas with clay soils. This is why the new populations of liver ﬂ ukes are usually found in river valleys.
kicides are available. Curatrem® (clorsulon) drench treats mature and immature ﬂ ukes. Ivomec® Plus (ivermectin and clorsulon) injections treat mature liver ﬂ ukes plus lice, grubs and nema-tode parasites.
Dannielle Tegeder 118 Union Street 7B, Brooklyn, N.Y. 11231 (917) 885-7857 firstname.lastname@example.org ______________________________________________________________________ Education MFA, School of the Art Institute of Chicago, IL BFA, State University of New York at Purchase, NY Amsterdam School of Fine Arts, the Netherlands Solo Exhibitions Solo Project, Montclair Art Mu
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