排序方式: 共有4条查询结果,搜索用时 62 毫秒
1
1.
Journal of Plant Diseases and Protection - The effectiveness of potassium bicarbonate against Venturi a inaequalis, the cause of apple scab, was studied. In vitro experiments with sodium, ammonium... 相似文献
2.
L. Jamar B. Lefrancq C. Fassotte M. Lateur 《European journal of plant pathology / European Foundation for Plant Pathology》2008,122(4):481-493
In a field experiment conducted over two growing seasons, the effectiveness and phytotoxicity of inorganic fungicides such
as sulphur, lime sulphur, copper, silicon and Armicarb (a new formulation of potassium bicarbonate) was compared with water
for the control of primary apple scab infections in Belgium on high, medium and low scab-susceptible cultivars (cvs ‘Pinova’,
‘Pirouette’ and ‘Reinette des Capucins’, respectively). In order to drastically reduce the amount of fungicide applied in
the orchard, two approaches were used: (1) a strategy involving spraying during the infection process, before fungal penetration
and (2) a tunnel sprayer machine for treatment applications. Under field conditions highly favourable for disease, low rates
of elemental sulphur (31.8 and 38.6 kg ha−1 year−1 in 2005 and 2006, respectively) combined with low rates of copper (2.1 kg ha−1 year−1 in both years) provided the best scab control and reduced scab severity on the fruits of cv. ‘Pinova’ by 97 and 98% compared
with water control in 2005 and 2006, respectively. Lime sulphur was much more effective than wettable sulphur and appeared
to be efficient at temperatures below 10°C, but its effectiveness against apple scab decreased if the treatments were applied
12–24 h later than in the ‘during-infection’ spray strategy. Armicarb used alone significantly reduced apple scab severity
on the leaves and fruits of the three cultivars compared with the water control. Its effectiveness was as good as wettable
sulphur applied using the same timing and dosage. Silicon reduced apple scab on fruits very slightly, but not on leaves. The
amounts of wettable sulphur, lime sulphur, copper, silicon and potassium bicarbonate used in this experiment to control apple
scab were not phytotoxic, did not increase fruit russet, did increase the yield of each cultivar and did not affect summer
density of the beneficial Typhlodromus pyri. The potential and limitations of ‘during-infection’ spraying as a protection strategy against apple scab in organic farming
are discussed. 相似文献
3.
The use of tunnel sprayers should be encouraged because they can potentially reduce pesticide input and drift in orchards. They could also allow smaller plot size in multifactorial trials in which fully randomized or randomized block designs are recommended. However, the effectiveness of plant protection products applied with tunnel sprayers cannot be reliably assessed without a thorough investigation into spray distribution in tree canopies. A set of three experiments was undertaken in an apple orchard to compare a new type of recycling tunnel sprayer with a standard axial fan sprayer, both of them fitted with either conventional hydraulic hollow cone nozzles (ATR) or drift-mitigating air induction cone nozzles (TVI). Its performance was assessed in terms of 1) spray deposit and coverage in the canopy, 2) sedimentation drift (spray drift to the ground) and 3) collection and recycling rate of the liquid sprayed in the tunnel. Artificial targets composed of cellulose papers and water-sensitive papers were used to evaluate the spray deposit and coverage at similar target positions for each treatment. A fluorescent dye was used as the spray tracer. 相似文献
4.
Jamar Laurent Song Janghoon Fauche Frédéric Choi Jangjeon Lateur Marc 《植物病害和植物保护杂志》2017,124(4):383-391
Journal of Plant Diseases and Protection - Pear scab, caused by Venturia pirina, is the most significant pear disease, causing economic losses in many pear production areas. In organic pear... 相似文献
1