Invitro Treatment of Blue Ticks Using a Phytosubstance
Nyembezi Mgocheki,
Jenias Ndava
Issue:
Volume 3, Issue 4, December 2019
Pages:
66-69
Received:
4 June 2019
Accepted:
4 July 2019
Published:
25 November 2019
Abstract: Ticks are some of the most devastating ectoparasites of livestock causing several tick borne diseases. Management of ticks is increasing getting difficulty using synthetic acaricides due their rapid tolerance to the synthetic acaricides. Botanical acaricides are now used as an alternative management strategy to curb such problems. The blue tick, Rhiphicephalus (Boophilus) decolaratus, is a one-host tick that parasitizes cattle and vectors a debilitating protozoan parasite that causes babesiosis. Acaricidal properties of thyme were investigated on the cattle blue tick, R.B. decolaratus using various concentrations to establish the lethal dose concentration. The acaridal activity of thyme on ticks was monitored and recorded at two-hour intervals for 48 hours. Tick mortality was observed at all concentrations except the control. The lowest mortality rate was observed for 10μl/cm3 while 40μl/cm3 resulted in total tick mortality. The LC50 was established as 1,9μl/cm3. Significant differences (p<0.01) were observed between concentrations, however the mortality was directly proportional to thyme concentration. The thyme oil dehydrated the ticks leading to death within 48 hours. The study thus concludes that thyme oil can be used as a complimentary or alternative acaricide in an integrated livestock program or where organic means are enforced or to as a way of minimizing tolerance of ticks to conventional acaricides.
Abstract: Ticks are some of the most devastating ectoparasites of livestock causing several tick borne diseases. Management of ticks is increasing getting difficulty using synthetic acaricides due their rapid tolerance to the synthetic acaricides. Botanical acaricides are now used as an alternative management strategy to curb such problems. The blue tick, Rh...
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Fertility Life Table of Leucoptera coffeella (Guérin-Mèneville) (Lepidoptera: Lyonetiidae) at Seven Temperatures in Coffee
Marisol Giraldo-Jaramillo,
Javier Garcia-Gonzalez,
Johanna Bajonero Rugno
Issue:
Volume 3, Issue 4, December 2019
Pages:
70-76
Received:
12 September 2019
Accepted:
4 October 2019
Published:
10 December 2019
Abstract: Coffee leaf miner Leucoptera coffeella (Guérin-Mèneville, 1842) (Lepidoptera: Lyonetiidae) it is a one biggest insect pest of coffee in American continent coffee plantations, due to its generalized occurrence, since all coffee varieties are susceptible to attack, and the economic damage caused, which can involve production losses up to 50%. The present study investigated biological aspects, including the fertility life table and the ideal conditions for reproduction and development of this pest, at 7 constant temperatures (18, 22, 25, 28, 30, 32, 35°C) under laboratory conditions. The results showed that the mean biological development time of L. coffeella was affected by temperature, completing its life cycle more rapidly in increased temperatures until the 32°C, but low survivor of all L. coffeella stages was observed from 30°C. The preoviposition period decreased with increasing temperatures, the total fecundity was significantly affected by the temperature and the longevities of males and females were affected by the temperature. The highest net reproductive rate (22.23), finite rate of increase (0.15) and viability were observed at 28°C, indicating that this temperature was the most suitable for development. The information obtained can be used in integrated pest management programs, to forecast L. coffeella outbreaks and population growth, and to study the behavior of this insect under different climate conditions
Abstract: Coffee leaf miner Leucoptera coffeella (Guérin-Mèneville, 1842) (Lepidoptera: Lyonetiidae) it is a one biggest insect pest of coffee in American continent coffee plantations, due to its generalized occurrence, since all coffee varieties are susceptible to attack, and the economic damage caused, which can involve production losses up to 50%. The pre...
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