The uptake of dried meat baits by foxes and investigations of baiting rates in Western Australia

2000 ◽  
Vol 27 (5) ◽  
pp. 451 ◽  
Author(s):  
P. C. Thomson ◽  
D. Algar
Keyword(s):  
Western Australia ◽  
Vulpes Vulpes ◽  
Large Scale ◽  
Field Trials ◽  
Oral Vaccination ◽  
Population Reduction ◽  
Scale Field ◽  
Large Scale Field

The uptake of dried meat baits by foxes (Vulpes vulpes) was measured in large-scale field trials using non-toxic baits containing the biomarker tetracycline. Baits were aerially delivered at nominal baiting rates of 5 baits km–2 (4 sites) and 10 baits km–2 (3 sites). The proportion of sampled adult foxes that had consumed the bio-marked baits ranged from 62 to 88% (mean 79.5%). Uptake of baits did not increase at the higher baiting rate. Bait uptake at the levels recorded in these trials would result in effective reductions in fox populations exposed to toxic baits. Bait uptake would have been sufficient to prevent the spread of rabies within fox populations at the densities occurring during the study, either by population reduction or in conjunction with oral vaccination.

Large-Scale Field Trials on Dense Vapour Dispersion

1985 ◽  
pp. 179-189 ◽  
Author(s):  
J. McQuaid ◽  
B. Roebuck ◽  
D. G. Wilde
Keyword(s):  
Large Scale ◽  
Field Trials ◽  
Scale Field ◽  
Large Scale Field

scholarly journals Off-Site Lime Stabilisation as an Option to Treat Pit Latrine Faecal Sludge for Emergency and Existing On-Site Sanitation Systems

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Wilson Greya ◽  
Bernard Thole ◽  
Catherine Anderson ◽  
Flavius Kamwani ◽  
Jan Spit ◽  
...  
Keyword(s):  
Large Scale ◽  
Buffer Capacity ◽  
Hydrated Lime ◽  
Field Trials ◽  
Small Scale ◽  
E Coli ◽  
Scale Field ◽  
Large Scale Field ◽  
Sanitation Systems ◽  
Faecal Sludge

Off-site lime stabilisation for treating faecal sludge was assessed by undertaking small-scale (35 L) and large-scale (600 L) field trials in Blantyre, Malawi. Hydrated lime was dosed to maintain pH 10, pH 10.5, pH 11, pH 11.5, and pH 12 depending on the buffer capacity of the faecal sludge in the four replica small-scale field trials. Significant reduction of E. coli to below the detection limit of 104 CFU/100 mL within 1 hour of treatment was reported for pH > 11. Based on the small-scale findings, large-scale field trials were conducted and greater than 3 log removal of E. coli was observed under pH 12 conditions. Therefore, based on the study, off-site lime stabilisation by dosing lime in the range of 10–35% w/w (dry solid basis), depending on the buffer capacity and solids content of the sludge to maintain pH > 11, can be used to sanitise faecal sludge during emergencies, as well as for existing on-site sanitation systems.

Pattern recognition of cardoon oil from different large-scale field trials

2018 ◽  
Vol 118 ◽  
pp. 236-245 ◽  
Author(s):  
Suzana Ferreira-Dias ◽  
Jorge Gominho ◽  
Isabel Baptista ◽  
Helena Pereira
Keyword(s):  
Pattern Recognition ◽  
Large Scale ◽  
Field Trials ◽  
Scale Field ◽  
Large Scale Field

scholarly journals Large-scale Field Trials of Imidacloprid for Control of the Spined Citrus Bug

HortScience ◽  
2003 ◽  
Vol 38 (4) ◽  
pp. 555-559
Author(s):  
J. Mo ◽  
K. Philpot
Keyword(s):  
Natural Enemies ◽  
Large Scale ◽  
New South ◽  
Field Trials ◽  
Negative Effects ◽  
South Wales ◽  
Tree Canopies ◽  
Scale Field ◽  
Large Scale Field ◽  
Orange Trees

Four large-scale field trials were carried out in 2001 and 2002 in lemon orchards in south-western New South Wales to assess the suitability of imidacloprid as a replacement for endosulfan in controlling the spined citrus bug (SCB), Biprorulus bibax Breddin (Hemiptera: Pentatomidae). The results showed that imidacloprid was at least as effective as endosulfan in controlling SCB, even when it was applied at a rate corresponding to half of its discriminate dose (100% kill). The application of imidacloprid did not reduce numbers of wasps and spiders foraging in tree canopies. However, imidacloprid was more toxic than endosulfan to parasitoids of the red scale and to lacewings. These negative effects can be minimised by timing the sprays in winter, when SCB adults congregate in neighbouring orange trees and the numbers of natural enemies of citrus pests are generally low.

Large scale field trials of a soluble glass zinc, cobalt and selenium bolus given to sheep

1998 ◽  
Vol 1998 ◽  
pp. 209-209
Author(s):  
N.R. Kendall ◽  
A.M. Mackenzie ◽  
D.V. Illingworth ◽  
D.W. Jackson ◽  
P.M. Driver ◽  
...  
Keyword(s):  
Large Scale ◽  
Copper Toxicity ◽  
Field Trials ◽  
Ewe Lambs ◽  
The United Kingdom ◽  
Soluble Glass ◽  
Trace Element Status ◽  
Scale Field ◽  
Large Scale Field

Many sheep in the United Kingdom are grazed on pastures deficient in cobalt and selenium. Proprietary products for selenium and cobalt supplementation often contain copper, which in certain breeds can induce copper toxicity. A soluble glass bolus has been manufactured to supply long term sustained release of cobalt and selenium similar to the commercially available Cosecure, but with the copper content being replaced by zinc. Sub clinical zinc deficiency has been suggested to be involved in disease conditions such as broken mouth periodontitis, footrot and mastitis. Therefore a long term continuous supply of zinc may be beneficial in these situations. This trial was designed to examine the effect of administering a zinc, cobalt and selenium soluble glass bolus on trace element status of over-wintered ewe lambs.

The effectiveness of a large-scale baiting campaign and an evaluation of a buffer zone strategy for fox control

2000 ◽  
Vol 27 (5) ◽  
pp. 465 ◽  
Author(s):  
P. C. Thomson ◽  
N. J. Marlow ◽  
K. Rose ◽  
N. E. Kok
Keyword(s):  
Western Australia ◽  
Vulpes Vulpes ◽  
Large Scale ◽  
Buffer Zone ◽  
Red Foxes ◽  
Population Reduction ◽  
High Level ◽  
Fox Control

The effectiveness of a baiting campaign against red foxes (Vulpes vulpes) was investigated in a rangeland area near Carnarvon, Western Australia. An area of 3180 km2 was aerially baited with dried meat baits containing 3 mg 1080 poison (5 baits km–2) in August 1995. All 45 radio-collared foxes monitored in the area were killed by baits. More than half the radio-collared foxes died within 3 days of baits being laid; the last surviving radio-collared fox died 44 days after baits were laid. The overall population reduction was estimated to be >95%. Further implications of this high level of bait uptake are discussed in relation to immunocontraceptive control of foxes, as well as for population reduction or vaccination of foxes to control rabies. Reinvasion of the baited area occurred mainly in autumn, when juvenile foxes were dispersing. The relevance of this result is discussed in relation to developing more effective baiting strategies. As part of another experiment, outer sections of the baited area were periodically re-baited as a buffer zone to reduce immigration by foxes into the central baited area; the buffer baiting proved to be very effective in preventing recolonisation of the entire baited area.

Seed disinfection: II. Large-scale field trials on the disinfection of seed corn with mercury dust disinfectants

1937 ◽  
Vol 27 (1) ◽  
pp. 43-52 ◽  
Author(s):  
W. A. R. Dillon Weston ◽  
F. Hanley ◽  
J. R. Booer
Keyword(s):  
Large Scale ◽  
Harmful Effect ◽  
Field Trials ◽  
Plant Population ◽  
Net Blotch ◽  
Seed Corn ◽  
Scale Field ◽  
Seed Disinfection ◽  
Large Scale Field ◽  
Harmful Effects

1. Treatment in bulk of the grain of wheat, barley, winter oats and spring oats with a proprietary dust, and two experimental dusts A and B which contained organic compounds of mercury, had no harmful effect on germination when drilling followed shortly after treatment. In the case of spring oats, drilling was delayed 7½ weeks after treatment without any harmful effects on germination.2. The proprietary and experimental dusts both proved effective in controlling bunt disease of wheat, and the leaf-stripe and net-blotch diseases of barley.3. In the case of barley, the proprietary and experimental dusts both increased the speed of “brairding” but not the final plant population. This hastening of seedling growth did not lead to a higher yield.4. In the case of winter oats, only the experimental dust A gave a significant increase in plant population and a satisfactory control of the loose smut disease.

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