Westerdahl B B, Giraud D, Riddle L J, Anderson C A
Department of Entomology and Nematology, University of California , Davis, CA 95616.
University of California Cooperative Extension , Eureka, CA 95501.
J Nematol. 2020;52:1-7. doi: 10.21307/jofnem-2020-010.
Easter lily bulbs for greenhouse forcing are produced in Del Norte County, California and Curry County, Oregon, USA. infestation seriously affects growth of field grown bulbs. During two consecutive years of field trials containing 22 treatments, commercially prepared formulations of essential oils (EOs) were compared to an untreated control and to a standard chemical fumigant treatment (FU) (1,3-dichloropropene and metam sodium) applied preplant followed by phorate (PH) at planting to determine their value in the management of lesion nematode, and in improving plant health. The EO products Duogard, EF400, EF300, and Cinnamite were tested as preplant dips to bulblet planting stock. The treated bulblets were tested either alone, in combination with PH at-planting, at planting following FU or in combination with PH at planting following FU. The organophosphates ethoprop and fosthiazate were also tested either alone, or at a reduced rate in combination with a reduced rate of PH. With respect to bulb circumference, ten treatments consistently outperformed the control. In consecutive years, three treatments had healthier looking roots than the control. At harvest, levels of lesion nematode within roots were consistently lower in nine treatments. EOs were beneficial in mitigating nematode damage. Easter lily bulbs for greenhouse forcing are produced in Del Norte County, California and Curry County, Oregon, USA. infestation seriously affects growth of field grown bulbs. During two consecutive years of field trials containing 22 treatments, commercially prepared formulations of essential oils (EOs) were compared to an untreated control and to a standard chemical fumigant treatment (FU) (1,3-dichloropropene and metam sodium) applied preplant followed by phorate (PH) at planting to determine their value in the management of lesion nematode, and in improving plant health. The EO products Duogard, EF400, EF300, and Cinnamite were tested as preplant dips to bulblet planting stock. The treated bulblets were tested either alone, in combination with PH at-planting, at planting following FU or in combination with PH at planting following FU. The organophosphates ethoprop and fosthiazate were also tested either alone, or at a reduced rate in combination with a reduced rate of PH. With respect to bulb circumference, ten treatments consistently outperformed the control. In consecutive years, three treatments had healthier looking roots than the control. At harvest, levels of lesion nematode within roots were consistently lower in nine treatments. EOs were beneficial in mitigating nematode damage.
用于温室促成栽培的复活节百合种球在美国加利福尼亚州的德尔诺特县和俄勒冈州的库里县生产。虫害严重影响田间种植种球的生长。在连续两年包含22种处理的田间试验中，将市售的精油（EOs）制剂与未处理的对照以及种植前施用的标准化学熏蒸剂处理（FU）（1,3 - 二氯丙烯和威百亩）进行比较，随后在种植时施用甲拌磷（PH），以确定它们在防治根腐线虫以及改善植株健康方面的价值。EO产品Duogard、EF400、EF300和肉桂酸盐作为种球种植材料的种植前浸蘸剂进行测试。处理过的种球单独进行测试，或在种植时与PH结合测试，或在FU处理后种植时测试，或在FU处理后种植时与PH结合测试。有机磷酸盐乙拌磷和噻唑磷也单独进行测试，或以降低的剂量与降低剂量的PH结合进行测试。关于种球周长，有10种处理始终优于对照。连续两年，有3种处理的根系看起来比对照更健康。收获时，9种处理的根内根腐线虫水平始终较低。精油在减轻线虫危害方面有益。用于温室促成栽培的复活节百合种球在美国加利福尼亚州的德尔诺特县和俄勒冈州的库里县生产。虫害严重影响田间种植种球的生长。在连续两年包含22种处理的田间试验中，将市售的精油（EOs）制剂与未处理的对照以及种植前施用的标准化学熏蒸剂处理（FU）（1,3 - 二氯丙烯和威百亩）进行比较，随后在种植时施用甲拌磷（PH），以确定它们在防治根腐线虫以及改善植株健康方面的价值。EO产品Duogard、EF400、EF300和肉桂酸盐作为种球种植材料的种植前浸蘸剂进行测试。处理过的种球单独进行测试，或在种植时与PH结合测试，或在FU处理后种植时测试，或在FU处理后种植时与PH结合测试。有机磷酸盐乙拌磷和噻唑磷也单独进行测试，或以降低的剂量与降低剂量的PH结合进行测试。关于种球周长，有10种处理始终优于对照。连续两年，有3种处理的根系看起来比对照更健康。收获时，9种处理的根内根腐线虫水平始终较低。精油在减轻线虫危害方面有益。
