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Cheng X.,Shandong Agricultural University | Liu X.,Shandong Agricultural University | Wang H.,Shandong Academy of Agricultural Sciences | Ji X.,Plant Protection and Inspection Station of Feicheng | And 3 more authors.
PLoS ONE | Year: 2015

Southern root-knot nematode (Meloidogyne incognita) is an obligate, sedentary endoparasite of more than 3000 plant species, that causes heavy economic losses and limit the development of protected agriculture of China. As a biological pesticide, emamectin benzoate has effectively prevented lepidopteran pests; however, its efficacy to control M. incognita remains unknown. The purpose of the present study was to test soil application of emamectin benzoate for management of M. incognita in laboratory, greenhouse and field trials. Laboratory results showed that emamectin benzoate exhibited high toxicity to M. incognita, with LC50 and LC90 values 3.59 and 18.20 mg L-1, respectively. In greenhouse tests, emamectin benzoate soil application offered good efficacy against M. incognita while maintaining excellent plant growth. In field trials, emamectin benzoate provided control efficacy against M. incognita and resulted in increased tomato yields. Compared with the untreated control, there was a 36.5%to 81.3%yield increase obtained from all treatments and the highest yield was received from the highest rate of emamectin benzoate. The results confirmed that emamectin benzoate has enormous potential for the control of M. incognita in tomato production in China. © 2015 Cheng et al.This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Source


Qiao K.,Shandong Agricultural University | Shi X.,Shandong Agricultural University | Wang H.,Shandong Academy of Agricultural Sciences | Ji X.,Plant Protection and Inspection Station of Feicheng | Wang K.,Shandong Agricultural University
Journal of Agricultural and Food Chemistry | Year: 2011

1,3-Dichloropropene (1,3-D) was evaluated as a potential alternative for the widely used soil fumigant methyl bromide (MeBr) in cucumber (Cucumis sativus Linn.) crops in China. Six treatments were replicated five times in a randomized complete block design: fumigation with MeBr (400 kg•ha -1), three 1,3-D doses (90, 120, and 180 L•ha-1), an avermectin dose (7.5 L•ha-1), and a nontreated control. Results consistently indicated that MeBr was generally superior to the treatments involving all 1,3-D and avermectin, which in turn were superior to the control, for improving cucumber yield and to control nematode and weed. In two successive seasons, 1,3-D at a dose of 180 L•ha-1 was as effective as MeBr in increasing plant height, vigor, and yield, as well as showed excellent nematode control efficiency, but it had relatively poor potency to control weeds. The present data support the conclusion that 1,3-D is a promising MeBr alternative for managing nematodes and weeds in cucumber crops and can be used in integrated pest management programs. © 2011 American Chemical Society. Source


Qiao K.,Shandong Agricultural University | Zhang H.,Shandong Agricultural University | Wang H.,Shandong Academy of Agricultural Sciences | Ji X.,Plant Protection and Inspection Station of Feicheng | Wang K.,Shandong Agricultural University
Scientia Horticulturae | Year: 2011

Aluminium phosphide (AlP) is a widely used fumigant due to its ability to kill a broad spectrum of stored-grain insect pests and its easy penetration into the commodity while leaving minimal residues. Field trials were conducted to ascertain the efficacy of AlP as a methyl bromide (MeBr) alternative in tomato (Solanum lycopersicum L.). Six treatments were replicated five times in a randomized complete block design: fumigation with MeBr (400kgha-1), three AlP doses (18.75, 37.50 and 56.25kgha-1), an avermectin dose (7.5Lha-1), and a non-treated control. Results consistently indicated that MeBr was generally superior to the treatments involving all AlP and avermectin, which in turn were superior to the control, for improving tomato yield, inhibiting nematode and weed. In two successive seasons, AlP at the dose of 56.25kgha-1 was as effective as MeBr in increasing plant height and vigor as well as maintaining excellent tomato yield, but it providing relatively medium control over nematode and weeds. The present data support the conclusion that AlP is a promising alternative to MeBr for managing nematodes and weeds in tomato crop and can be used effectively in integrated pest management programs. © 2011 Elsevier B.V. Source


Qiao K.,Shandong Agricultural University | Dong S.,Shandong Agricultural University | Wang H.,Shandong Academy of Agricultural Sciences | Xia X.,Shandong Agricultural University | And 2 more authors.
Crop Protection | Year: 2012

Replicated field trials were conducted to determine the effect of 1,3-dichloropropene (1,3-D) as a potential alternative for methyl bromide (MeBr) in tomato-cucumber rotations in two successive cropping seasons in China. Fumigation with MeBr (400 kg ha -1), three 1,3-D doses (180, 120 and 90 l ha -1), an avermectin dose (187.5 g ha -1) and an untreated control were compared. Tomato data revealed that MeBr was generally superior to the treatments involving 1,3-D and avermectin, which in turn were superior to the control, for improving tomato crop yield and inhibiting Meloidogyne incognita, weeds and mortality caused by plant disease. In a successive cucumber crop, all fumigants tested except avermectin, showed significant continual influence in the same plots. In most cases, the highest 1,3-D dose was comparable to MeBr. Overall, in both growth seasons, 1,3-D at the dose of 180 l ha -1 was as effective as MeBr in increasing plant height, yield and in reducing the incidence of soil borne disease, especially in maintaining excellent M. incognita control, but it provided only moderate control of weeds. On the basis of these results, combining 1,3-D with other alternatives to MeBr, is recommended for satisfactory control of soil pests in tomato-cucumber rotations in China. © 2012 Elsevier Ltd. Source


Qiao K.,Shandong Agricultural University | Liu X.,Shandong Agricultural University | Wang H.,Shandong Academy of Agricultural Sciences | Xia X.,Shandong Agricultural University | And 2 more authors.
Pest Management Science | Year: 2012

Background: Tomato growers in Shandong Province, China, commonly face heavy root-knot nematode infestations. Current methods of control include cadusafos and methyl bromide (MeBr), but alternative methods are required because of the high toxicity of these pesticides and the ecological risk of their use. Therefore, abamectin soil applications were evaluated for their potential to control soil nematodes in a series of laboratory tests, greenhouse pot experiments and field trials. Results: Laboratory tests showed that abamectin exhibited rapid knockdown of Meloidogyne incognita, with LC 50 and LC 90 values that were superior to those of cadusafos and averaged 7.06 and 21.81 mg L -1. In the greenhouse pot experiment, soil applications of abamectin provided significant M. incognita control similar to that provided by cadusafos while maintaining excellent plant height and vigour. In the field trials, abamectin exhibited excellent control effects to nematodes while giving a higher tomato yield. There was a 19.3-39.0% yield increase from the various treatments compared with the control, and the best results were obtained from the highest dose of abamectin. Conclusion: The results of this study demonstrated that abamectin has the potential to be used as an effective alternative to MeBr and cadusafos for nematode control in tomato production in Shandong Province. © 2012 Society of Chemical Industry. Source

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