蜱虫控制对赞比亚中部地区牛体重增加的影响。

Effect of tick control on liveweight gain of cattle in central Zambia.

作者信息

Pegram R G, Lemche J, Chizyuka H G, Sutherst R W, Floyd R B, Kerr J D, McCosker P J

机构信息

Economics of Ticks Project (GCP/ZAM/029/DEN), Food and Agriculture Organization, Lusaka, Zambia.

出版信息

Med Vet Entomol. 1989 Jul;3(3):313-20. doi: 10.1111/j.1365-2915.1989.tb00234.x.

DOI:10.1111/j.1365-2915.1989.tb00234.x

PMID:2519678

Abstract

Field trials were carried out during 1982-86 in two different ecotypes in central Zambia to determine the impact of tick control on the liveweight gain (LWG) of cattle. During the first 2 years of the trial a diamidide acaricide (Amitraz) sprayed at weekly intervals caused periodic depression in LWG in young animals. Thereafter a pyrethroid acaricide (cypermethrin) was used. During the 1984-85 tick season infestations of 50-120 adult Amblyomma variegatum Fabricius in untreated animals caused significant reductions in LWG. From the differences in LWG between treated and untreated cattle, the induced loss in LWG was estimated at 46-61 g per engorged female A.variegatum.

摘要

1982年至1986年期间，在赞比亚中部的两种不同生态类型地区进行了田间试验，以确定蜱虫控制对牛体重增加（LWG）的影响。在试验的前两年，每周喷洒一次双甲脒杀螨剂（ Amitraz），导致幼畜的体重增加出现周期性下降。此后使用了拟除虫菊酯杀螨剂（氯氰菊酯）。在1984 - 1985年蜱虫季节，未处理动物身上有50 - 120只成年杂色花蜱（Amblyomma variegatum Fabricius）寄生，导致体重增加显著下降。根据处理和未处理牛之间体重增加的差异，估计每只饱血的雌性杂色花蜱导致体重增加减少46 - 61克。