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Smart Agriculture ›› 2021, Vol. 3 ›› Issue (3): 52-59.doi: 10.12133/j.smartag.2021.3.3.202105-SA007

• Topic--Intelligent Plant Protection Machinery and Spraying Technology • Previous Articles     Next Articles

Effects on Control Efficacy of Pesticide-Adjuvants Mixture against Rice Chilo Suppressalis(walker) Based on Plant Protection Unmanned Aerial Vehicle

ZI Le1,2,3,4(), ZANG Yu1,2,3,4, HUANG Junhao1,2,3,4, BAO Ruifeng1,2,3,4, ZHOU Zhiyan1,2,3,4(), XIAO Hanxiang5()   

  1. 1.College of Engineering, South China Agricultural University/Guangdong Engineering Research Center for Agricultural Aviation Application, Guangzhou 510642, China
    2.Guangdong Provincial Key Laboratory for Agricultural Artificial Intelligence, Guangzhou 510642, China
    3.National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology, Guangzhou 510642, China
    4.Key Laboratory of Key Technology on Agricultural Machine and Equipment (South China Agricultural University), Ministry of Education, Guangzhou, Guangdong Province, P. R. China, Guangzhou 510642, China
    5.Institute, Guangdong Academy of Agricultural Sciences/Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, China
  • Received:2021-04-29 Revised:2021-06-18 Online:2021-09-30
  • Foundation items:
    2020 Guangdong Province Rural Revitalization Strategy Special Project (2020KJ261); Guangdong Province Science and Technology Plan Project (2021B1212040009); Guangdong Province Basic and Applied Basic Research Foundation (2020A1515110214)
  • About author:ZI Le, E-mail:891750786@qq.com
  • corresponding author:

    1. ZHOU Zhiyan, E-mail:zyzhou@scau.edu.cn;

    2. XIAO HanxiangE-mail:290432210@qq.com

Abstract:

To explore the effect of pesticide-adjuvants mixture on the control efficacy against Rice Chilo Suppressalis(walker). This study designed a three-factor, three-level orthogonal experiments with pesticides (10% emamectin benzoate·indoxacard SC, 5% chlorantraniliprole SC and 0.8% rotenone SC), adjuvants(organosilicon, lecithin and mineral Oil) , spray volume (21,24 and 27 L/hm2), referred to the three-factor, three-level orthogonal experimental scheme. And made the blank factor the deviation to analyze its rationality. Analysis of variance (ANOVA) statistical method was used to analyze the significance level of each factor. Duncan's new multiple range test (DMRT) method was used to analyze the order of the influence of different levels of each factor on the control efficacy against Rice Chilo Suppressalis(walker). The results showed that, under the experiment conditions of this research, the mean square value of the deviation factor was smaller than the mean square value of the pesticides, the adjuvants and the spray volume, and the deviation of the orthogonal experiment was within a reasonable range. The main order of the effect of the three factors on the control efficacy of Rice Chilo Suppressalis(walker) was: adjuvants > pesticides > spray volumn. On the 14th day after spraying, pesticides showed a significant effect on the control efficacy (P<0.05) and adjuvants showed a highly significant effect on the control efficacy (P<0.01), and spray volume showed no significant effect on the control efficacy. On the 14th day after spraying, the level 3 of the factor "pesticides" was more effective, in the order of Rotenone > Chlorantraniliprole > Emamectin Benzoate·Indoxacard. The level 1 of the factor "adjuvants" was more effective, in the order of Organosilicon > Lecithin > Mineral Oil. The level 3 of the factor "spray volume" was more effective, in the order of 27 L/hm2 > 24 L/hm2 > 21 L/hm2. Therefore, a preferred pesticide-adjuvants mixture method was 0.8% rotenone SC, organosilicon adjuvants and 27 L/hm2 of spray volume, which had a rapid and long-lasting control efficacy, and its control efficacy in the field reached 81.45% on the 14th day after spraying. Additionally, there was also a satisfactory pesticide-adjuvants mixture method that was 5% Chlorantraniliprole, organosilicon adjuvants and 24 L/hm2 of spray volume. This mixture method also performed well, achieving 79.3% control efficacy in the field on the 14th day after spraying. This study could provide a reference for the optimization of the mixture methods of solutions (pesticides, adjuvants and spray volume) for controlling Rice Chilo Suppressalis(walker).

Key words: plant protection UAV, Rice Chilo Suppressalis (walker), adjuvants, pesticide, control efficacy

CLC Number: