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首页> 外文期刊>Australasian Plant Pathology >The use of metalaxyl and potassium phosphonate, mounds, and organic and plastic mulches, for the management of Phytophthora root rot of papaya in far northern Queensland
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The use of metalaxyl and potassium phosphonate, mounds, and organic and plastic mulches, for the management of Phytophthora root rot of papaya in far northern Queensland

机译：使用甲霜灵和膦酸钾，土堆以及有机和塑料覆盖物，管理昆士兰州北部的木瓜疫霉根腐病

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摘要

Options for the control of root rot of papaya caused by Phytophthora palmivora were evaluated in two field experiments in far northern Queensland, Australia. In the first experiment, foliar sprays of potassium phosphonate (10 g/L) applied fortnightly reduced the incidence of root rot by 47%. Metalaxyl granules (1.25 g/m(2)) applied every 6 weeks, and metalaxyl granules (1.25 g/m(2)) applied at transplanting combined with fortnightly foliar sprays of potassium phosphonate (10 g/L) also provided a level of control. Fortnightly foliar sprays of potassium phosphonate (5 g/L) and monthly foliar sprays of potassium phosphonate (5 and 10 g/L), and fortnightly and monthly soil drenches with potassium phosphonate (1 and 2 g/L) had no significant effect (P>0.05) on the incidence of root rot. In the second experiment, growing papaya on 0.75 m mounds reduced the incidence of root rot by 38.4% and significantly increased fruit yield. Soil covers of 2 m wide plastic mulch and organic mulch in combination with 0.75 m mounds, further reduced plant losses by 20 and 10%, respectively. Plastic mulch on flat ground was as effective as the mounded treatments in reducing the incidence of root rot and increasing yield.
机译：在澳大利亚昆士兰州北部的两个田间试验中，评估了控制疫霉棕榈引起的木瓜根腐病的选择方案。在第一个实验中，每两周喷一次叶面喷施膦酸钾（10 g / L），可将根腐病的发生率降低47％。每六周施用甲霜灵颗粒（1.25 g / m（2）），移植时与每两周叶面喷施膦酸钾（10 g / L）结合使用的甲霜灵颗粒（1.25 g / m（2））也提供了控制。每两周一次的膦酸钾叶面喷剂（5 g / L）和每月一次的膦酸钾叶面喷剂（5和10 g / L），以及每两周和每月一次的膦酸钾浸水（1和2 g / L）都没有显着影响（ P> 0.05）对根腐病的发生率。在第二个实验中，在0.75 m丘上种植木瓜可将根腐病的发生率降低38.4％，并显着提高果实产量。 2 m宽的塑料覆盖物和0.75 m的土层覆盖的土壤覆盖层分别使植物损失减少了20％和10％。在减少地面根腐病发生率和增加产量方面，在平坦地面上进行塑料覆盖与堆肥处理一样有效。

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