Conventional Methods of Pesticide Application in Agricultural Field and Fate of the Pesticides in the Environment and Human Health

Dhananjayan, Venugopal; Jayakumar, S.; Ravichandran, Beerappa

doi:10.1007/978-3-030-23396-9_1

Cited by 44 publications

(22 citation statements)

References 116 publications

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“…With the rapid growth of global population, the overall requirements of agricultural products from human beings have been continuously increasing ( Dhananjayan, Jayakumar & Ravichandran, 2020 ). According to the prediction of the Food and Agriculture Organization of the United Nations (FAO), the world population is expected to reach 9 billion by 2050, and the need for agricultural products will increase by 70% ( Sylvester, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

UAV spraying on citrus crop: impact of tank-mix adjuvant on the contact angle and droplet distribution

Meng

Zhong

Liu

et al. 2022

PeerJ

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Adding tank-mix adjuvants into the spray mixture is a common practice to improve droplet distribution for field crops (e.g., rice, wheat, corn, etc.) when using Unmanned Aerial Vehicle (UAV) sprayers. However, the effectiveness of tank-mix adjuvant for UAV spraying in orchard crops is still an open problem, considering their special canopy structure and leaf features. This study aims to evaluate the effects of a typical tank-mix adjuvant concentrations (i.e., Nong Jian Fei (NJF)) on Contact Angle (CA) and droplet distribution in the citrus tree canopy. Three commonly used parameters, namely dynamic CA, droplet coverage, and Volume Median Diameter (VMD), are adopted for performance evaluation. The dynamic CAs on the adaxial surface of citrus leaves, for water-only and NJF-presence sprays, respectively, are measured with five concentration levels, where three replications are performed for each concentration. The sprays with 0.5‰ NJF are adopted in the field experiment for evaluating droplet distributions, where Water Sensitive Papers (WSPs) are used as collectors. Two multi-rotor UAVs (DJI T20 and T30) which consist of different sizes of pesticide tanks and rotor diameters are used as the spraying platforms. Both water-only and NJF-presence treatments are conducted for the two UAVs, respectively. The results of the CA experiment show that NJF addition can significantly reduce the CAs of the sprays. The sprays with 0.5‰ NJF obtain the lowest CA within the observing time, suggesting a better spread ability on solid surface (e.g., WSPs or/and leaves). With respect to the effects of NJF addition on individual UAVs, the field trial results indicate that NJF addition can remarkably increase both the droplet coverage and VMD at three canopy layers, except for T30 droplet coverage of the inside and bottom layers. Comparing the difference of droplet coverage between two UAVs, while significant difference is found in the same layer before NJF addition, there is no notable difference appearing in the outside and bottom layers after NJF addition. The difference of VMD in the same layer between two UAVs is not affected by NJF addition except for the bottom layer. These results imply that the differences of droplet coverage among different UAVs might be mitigated, thus the droplet distribution of some UAVs could be improved by adding a tank-mix adjuvant into the sprays. This hypothesis is verified by investigating the droplet penetration and the correlation coefficient (CC) of droplet coverage and VMD. After NJF addition, the total percentage of T20 droplet coverage in the bottom and inside layers is increased by 5%. For both UAVs, the CCs indicate that both droplet coverage and VMD increase at the same time in most cases after NJF addition. In conclusion, the addition of a tank-mix adjuvant with the ability to reduce CA of the sprays, can effectively improve droplet distribution using UAV spraying in the citrus canopy by increasing droplet coverage and VMD.

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Section: Introductionmentioning

confidence: 99%

UAV spraying on citrus crop: impact of tank-mix adjuvant on the contact angle and droplet distribution

Meng

Zhong

Liu

et al. 2022

PeerJ

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“…A report by the United States Environmental Protection Agency in 2016 has shown that, in some developing countries where the use of agrochemicals is high, there are health problem issues in the population. The major factors that cause the increase in health hazards due to the use of pesticides are the application of the cheapest, but the toxic type of agrochemicals and the presence, in residues, of agrochemicals on the consumable products (Dhananjayan et al 2020).…”

Section: Agrochemical Impact On the Environment And Human Healthmentioning

confidence: 99%

The multifaceted plant-beneficial rhizobacteria toward agricultural sustainability

Babalola¹,

Fasusi²

2021

Plant Prot. Sci.

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Agricultural practices depend mainly on the use of chemical fertilisers, pesticides, and herbicides which have caused serious health hazards and have also contributed to the pollution of the environment at large. The application of plant-beneficial rhizobacteria in agrarian practices has become paramount in increasing soil fertility, promoting plant growth, ensuring food safety, and increasing crop production to ensure sustainable agriculture. Beneficial rhizobacteria are soil microorganisms that are eco-friendly and serve as a modern method of improving the plant yield, protecting the plant and soil fertility that pose no harm to humans and the environment. This eco-friendly approach requires the application of beneficial rhizobacteria with plant growth-promoting traits that can improve the nutrient uptake, enhance the resistance of plants to abiotic and biotic stress, protect plants against pathogenic microorganisms and promote plant growth and yield. This review article has highlighted the multitasking roles that beneficial rhizobacteria employ in promoting plant growth, food production, bioremediation, providing defence to plants, and maintaining soil fertility. The knowledge acquired from this review will help in understanding the bases and importance of plant-beneficial rhizobacteria in ensuring agricultural sustainability and as an alternative to the use of agrochemicals.

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“…Farmers predominantly rely on the synthetic insecticides to combat the infestation of H. armigera and S. litura. Many non-target effects are being manifested by the extensive use of these synthetic chemicals such as the development of pesticide resistance, eradication of beneficial fauna including insect parasitoids and predators, and human health hazards (Isman, 2006;Desneux et al, 2007;Halstead et al, 2015;Naeem et al, 2016;Kim et al, 2017;Dhananjayan et al, 2020;Haddi et al, 2020). Moreover, many strains and field populations of H. armigera and S. litura have shown high resistance level…”

Section: Introductionmentioning

confidence: 99%

Chemopreventive and Chemosensitizing Effects of Green Tea: An Evidence-based Review

Gul¹,

Hassan²,

Maryam³

et al. 2022

PJZ

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Conventional Methods of Pesticide Application in Agricultural Field and Fate of the Pesticides in the Environment and Human Health

Cited by 44 publications

References 116 publications

UAV spraying on citrus crop: impact of tank-mix adjuvant on the contact angle and droplet distribution

UAV spraying on citrus crop: impact of tank-mix adjuvant on the contact angle and droplet distribution

The multifaceted plant-beneficial rhizobacteria toward agricultural sustainability

Chemopreventive and Chemosensitizing Effects of Green Tea: An Evidence-based Review

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