Environmental factors such as relative humidity and rainfall generally have been found to increase the incidence, rate of spread and severity of diseases thereby reducing yield of crops. Study was conducted on five co...Environmental factors such as relative humidity and rainfall generally have been found to increase the incidence, rate of spread and severity of diseases thereby reducing yield of crops. Study was conducted on five cotton varieties, which were artificially inoculated with bacterial blight pathogen to determine the effects of rainfall and relative humidity on incidence and severity of angular leaf spot (ALS) and yield of seed cotton in Yola and Mubi. Results showed that the severity of ALS was higher in Yola (58.65%) at 13 WAS assumed to be due to higher relative humidity range of 76% - 87% and low rainfall of 2 - 40.6 mm. This is assumed to have favoured disease development as against that of Mubi location which recorded lower severity (51.11%) due to lower relative humidity (42% - 55%) and rainfall (37 - 73 mm). Results further revealed that at 13 WAS, SAMCOT-8 had low incidence (66%) and severity (39%) in Yola. This was against the much higher corresponding incidence and severity of 82% and 42% respectively that was observed in Mubi during the same period. SAMCOT-10 and SAMCOT-9 varieties were found to be highly susceptible to the disease at the same period. SAMCOT-8 recorded the highest yield of 390.00 kg?ha?1 in Yola and 868.09 kg?ha?1 in Mubi while the lowest yields of 227.17 kg?ha?1 was observed on SAMCOT-10 in Yola while 461.61 kg?ha?1 was obtained on SAMCOT-9 in Mubi. The variation in yield among these varieties might be due to the differences in their reactions to the disease. There is a need to conduct further trials in these locations to confirm the level of resistance or other aspects of these varieties to the disease.展开更多
[目的]明确8种商品化杀细菌剂对黄瓜细菌性角斑病和大白菜软腐病的防治效果。[方法]采用96孔细胞培养板法、室内活体盆栽法和田间药效试验测定8个杀细菌剂对黄瓜细菌性角斑病和大白菜软腐病的室内最小抑菌质量浓度、室内活体盆栽防效和...[目的]明确8种商品化杀细菌剂对黄瓜细菌性角斑病和大白菜软腐病的防治效果。[方法]采用96孔细胞培养板法、室内活体盆栽法和田间药效试验测定8个杀细菌剂对黄瓜细菌性角斑病和大白菜软腐病的室内最小抑菌质量浓度、室内活体盆栽防效和田间药效。[结果]77%氢氧化铜可湿性粉剂对黄瓜细菌性角斑病抑菌活性和防治效果最高,室内最小抑菌质量浓度为400 mg/L,室内活体盆栽EC50为26.43 mg/L,在300 g a.i./hm^(2)剂量下田间药效85.83%。50%氯溴异氰尿酸可溶粉剂对大白菜软腐病抑菌活性和防治效果最高,室内最小抑菌质量浓度为600 mg/L,室内活体盆栽EC_(50)为112.55 mg/L,在300 g a.i./hm^(2)剂量下田间药效86.86%。其余药剂20%噻霉酮悬浮剂、20%噻唑锌悬浮剂、33.5%喹啉铜悬浮剂、30%噻森铜悬浮剂、20%噻菌铜悬浮剂和2%春雷霉素可湿性粉剂对2种细菌性病害均有不同程度抑菌活性和防治效果。[结论]8种药剂在农业上对黄瓜细菌性角斑病和大白菜软腐病均有一定的防治效果。防治黄瓜细菌性角斑病推荐氢氧化铜,防治大白菜软腐病推荐氯溴异氰尿酸。展开更多
This paper introduces the identification characteristics,occurrence regularity and control methods of several leaf diseases of poplar,including poplar angular leaf spot,poplar large spot,poplar leaf blight and poplar ...This paper introduces the identification characteristics,occurrence regularity and control methods of several leaf diseases of poplar,including poplar angular leaf spot,poplar large spot,poplar leaf blight and poplar rust,in order to provide the basis for the healthy growth of poplar and the technical support for the sustainable development of forestry industry.展开更多
文摘Environmental factors such as relative humidity and rainfall generally have been found to increase the incidence, rate of spread and severity of diseases thereby reducing yield of crops. Study was conducted on five cotton varieties, which were artificially inoculated with bacterial blight pathogen to determine the effects of rainfall and relative humidity on incidence and severity of angular leaf spot (ALS) and yield of seed cotton in Yola and Mubi. Results showed that the severity of ALS was higher in Yola (58.65%) at 13 WAS assumed to be due to higher relative humidity range of 76% - 87% and low rainfall of 2 - 40.6 mm. This is assumed to have favoured disease development as against that of Mubi location which recorded lower severity (51.11%) due to lower relative humidity (42% - 55%) and rainfall (37 - 73 mm). Results further revealed that at 13 WAS, SAMCOT-8 had low incidence (66%) and severity (39%) in Yola. This was against the much higher corresponding incidence and severity of 82% and 42% respectively that was observed in Mubi during the same period. SAMCOT-10 and SAMCOT-9 varieties were found to be highly susceptible to the disease at the same period. SAMCOT-8 recorded the highest yield of 390.00 kg?ha?1 in Yola and 868.09 kg?ha?1 in Mubi while the lowest yields of 227.17 kg?ha?1 was observed on SAMCOT-10 in Yola while 461.61 kg?ha?1 was obtained on SAMCOT-9 in Mubi. The variation in yield among these varieties might be due to the differences in their reactions to the disease. There is a need to conduct further trials in these locations to confirm the level of resistance or other aspects of these varieties to the disease.
文摘[目的]明确8种商品化杀细菌剂对黄瓜细菌性角斑病和大白菜软腐病的防治效果。[方法]采用96孔细胞培养板法、室内活体盆栽法和田间药效试验测定8个杀细菌剂对黄瓜细菌性角斑病和大白菜软腐病的室内最小抑菌质量浓度、室内活体盆栽防效和田间药效。[结果]77%氢氧化铜可湿性粉剂对黄瓜细菌性角斑病抑菌活性和防治效果最高,室内最小抑菌质量浓度为400 mg/L,室内活体盆栽EC50为26.43 mg/L,在300 g a.i./hm^(2)剂量下田间药效85.83%。50%氯溴异氰尿酸可溶粉剂对大白菜软腐病抑菌活性和防治效果最高,室内最小抑菌质量浓度为600 mg/L,室内活体盆栽EC_(50)为112.55 mg/L,在300 g a.i./hm^(2)剂量下田间药效86.86%。其余药剂20%噻霉酮悬浮剂、20%噻唑锌悬浮剂、33.5%喹啉铜悬浮剂、30%噻森铜悬浮剂、20%噻菌铜悬浮剂和2%春雷霉素可湿性粉剂对2种细菌性病害均有不同程度抑菌活性和防治效果。[结论]8种药剂在农业上对黄瓜细菌性角斑病和大白菜软腐病均有一定的防治效果。防治黄瓜细菌性角斑病推荐氢氧化铜,防治大白菜软腐病推荐氯溴异氰尿酸。
基金Supported by General Program of Natural Science Foundation of Henan Province(222300420508)Scientific and Technological Research Program of Science and Technology Department of Henan Province(202102310478)+1 种基金Highlevel Talents Start-up Fund of Pingdingshan University(PXY-BSQD-2012009)Training Program for Young Key Teachers in Colleges and Universities of Henan Province(2021GGJS147)。
文摘This paper introduces the identification characteristics,occurrence regularity and control methods of several leaf diseases of poplar,including poplar angular leaf spot,poplar large spot,poplar leaf blight and poplar rust,in order to provide the basis for the healthy growth of poplar and the technical support for the sustainable development of forestry industry.
