Insecticide application and its effect on the density of rice planthoppers, &lt;i&gt;Nilaparvata lugens&lt;/i&gt; and &lt;i&gt;Sogatella furcifera&lt;/i&gt;, in paddy fields in the Red River Delta, Vietnam

Matsukawa-Nakata, Mizuki; Kobori, Youichi

doi:10.1584/jpestics.d18-080

Cited by 11 publications

(11 citation statements)

References 21 publications

(24 reference statements)

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“…population and WBPH-white-backed planthoppers (Sogatella furcifera) were influenced by active ingredients compound and crop seasons. Non-selective compounds lean towards decreasing either BPH or WBPH population, while the selective compound failed to reduce BPH population [23]. The world has long been concerned about how the unselective application of pesticides is the primary causal of the most important outbursts of insect pests [24].…”

Section: Resultsmentioning

confidence: 99%

Population Dynamic of Brown Plant Hopper, Predators and Neutral Insects in Irrigated Rice of Yogyakarta after Insecticides Application

Pustika¹,

Sudarmaji

Kobarsih³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Brown Plant Hopper (BPH) infestation in irrigated rice agroecosystem resulted yield loss. The application of insecticides by farmers are usually excessive, reducing pest population and negatively affecting the predators. This research aimed to define the impact of insecticides on the population dynamic of BPH, predator and neutral insects which influenced rice yield. Research was conducted at Yogyakarta, Indonesia, during May to September 2021. Randomized Block using four replications was applied. Rice varieties Inpari 32 HDB and Inpari 42 GSR were planted. Insecticide with active ingredient spinetoram 120 g/l and triflumezopyrim 106 g/l were applied to the rice plant on day 40th then pimetrozin 50% was applied at day 50th. Results showed that BPH population was reduced from 30-50 nymph per 30 plants to 10 nymph at day 12th after pimetrozin 50% application or at the day 2nd after spinetoram and triflumezopyrim insecticides application until day 50th. In contrast, BPH population in all insecticide plants was significantly lower than in all control and did not increase until harvest. On the other side, predators such as Paederus sp and Coccinelids were not affected by all insecticides, except Ophionea sp, Spiders and Cythorinus sp. However, their population recovered at day 30th after first insecticides application. Within the fluctuated population of BPH, rice productivity of Inpari 32 HDB and Inpari 42 GSR applied with insecticides were 9.52 ton ha-1 and 10.60 ton ha-1, while Inpari 32 HDB control and Inpari 42 GSR control 9.44 ton ha-1 and 10.72 ton ha-1

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Section: Resultsmentioning

confidence: 99%

Population Dynamic of Brown Plant Hopper, Predators and Neutral Insects in Irrigated Rice of Yogyakarta after Insecticides Application

Pustika¹,

Sudarmaji

Kobarsih³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Ranked as the second most severe natural hazard after typhoons, freshwater floods are caused by overflowing rivers or heavy monsoonal rains or associated with heavy rain from typhoons (Chan et al, 2012(Chan et al, , 2015Hung et al, 2012;McElwee et al, 2017). Theoretically, flooding reduces rice growing areas, but it is simplistic to assume that flooded fields result in immediate loss of rice crops.…”

Section: Freshwater Floodingmentioning

confidence: 99%

Interacting effects of land-use change and natural hazards on rice agriculture in the Mekong and Red River deltas in Vietnam

Yuen

Hanh

Quynh³

et al. 2021

Nat. Hazards Earth Syst. Sci.

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Abstract. Vietnam is a major rice producer, and much of the rice grown is concentrated in the Red River Delta (RRD) and the Mekong River Delta (MRD). While the two deltas are highly productive regions, they are vulnerable to natural hazards and the effects of human-induced environmental change. To show that the processes and issues affecting food security are reinforcing, interdependent and operating at multiple scales, we used a systems-thinking approach to represent the major linkages between anthropogenic land-use and natural hazards and elaborate on how the drivers and environmental processes interact and influence rice growing area, rice yield and rice quality in the two deltas. On a local scale, demand for aquaculture and alternative crops, urban expansion, dike development, sand mining and groundwater extraction decrease rice production in the two deltas. Regionally, upstream dam construction impacts rice production in the two deltas despite being distally situated. Separately, the localized natural hazards that have adversely affected rice production include droughts, floods and typhoons. Outbreaks of pests and diseases are also common. Climate-change-induced sea level rise is a global phenomenon that will affect agricultural productivity. Notably, anthropogenic developments meant to improve agricultural productivity or increase economic growth can create many unwanted environmental consequences such as an increase in flooding, saltwater intrusion and land subsidence, which in turn decreases rice production and quality. In addition, natural hazards may amplify the problems created by human activities. Our meta-analysis highlights the ways in which a systems-thinking approach can yield more nuanced perspectives to tackle “wicked” and interrelated environmental challenges. Given that deltas worldwide are globally significant for food production and are highly stressed and degraded, a systems-thinking approach can be applied to provide a holistic and contextualized overview of the threats faced in each location.

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“…The application of chemical insecticides has been an effective measure for controlling S. furcifera . However, the frequent and irrational use of these insecticides has led to resistance against various insecticides in this pest [ 6 , 7 ]. Therefore, it is urgent to discover more scientific and efficient pest management approaches to control S. furcifera .…”

Section: Introductionmentioning

confidence: 99%

Molecular Characterization of UDP-N-Acetylglucosamine Pyrophosphorylase and Its Role in the Growth and Development of the White-Backed Planthopper Sogatella furcifera (Hemiptera: Delphacidae)

Wang

Long

Zhou

et al. 2022

Genes

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UDP-N-acetylglucosamine pyrophosphorylase (UAP) is a key enzyme in the chitin biosynthesis pathway of insects. Here, we described the gene SfUAP in the white-backed planthopper Sogatella furcifera (Horváth) with an open reading frame of 1470 bp. Quantitative real-time polymerase chain reaction (qPCR) suggested that SfUAP exhibits a different developmental expression pattern and a higher expression after molting. The highest expression of SfUAP was observed in the integument tissues of adults, whereas head tissues showed negligible expression. RNAi-based gene silencing decreased the mRNA transcript levels in S. furcifera nymphs injected with double-stranded RNA of SfUAP. Finally, SfUAP silencing led to 84% mortality and malformed phenotypes in nymphs. Thus, our results can help better understand the role of SfUAP in S. furcifera.

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Insecticide application and its effect on the density of rice planthoppers, <i>Nilaparvata lugens</i> and <i>Sogatella furcifera</i>, in paddy fields in the Red River Delta, Vietnam

Cited by 11 publications

References 21 publications

Population Dynamic of Brown Plant Hopper, Predators and Neutral Insects in Irrigated Rice of Yogyakarta after Insecticides Application

Population Dynamic of Brown Plant Hopper, Predators and Neutral Insects in Irrigated Rice of Yogyakarta after Insecticides Application

Interacting effects of land-use change and natural hazards on rice agriculture in the Mekong and Red River deltas in Vietnam

Molecular Characterization of UDP-N-Acetylglucosamine Pyrophosphorylase and Its Role in the Growth and Development of the White-Backed Planthopper Sogatella furcifera (Hemiptera: Delphacidae)

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