Modification and Application of a Leaf Blower-vac for Field Sampling of Arthropods

Zou, Yi; Telgen, Mario D. van; Chen, Junhui; Xiao, Hai; Kraker, Joop de; Bianchi, Felix J.J.A.; Werf, Wopke Van der

doi:10.3791/54655

Cited by 11 publications

(13 citation statements)

References 18 publications

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“…Arthropods were sampled with a modified blower‐vac suction sampler, in combination with a circular enclosure with a 0.125 m 2 bottom area (Zou et al, ). In both, the sprayed and unsprayed plots, six random samples were taken at least 2 m away from the field margin and plot border.…”

Section: Methodsmentioning

confidence: 99%

Do diverse landscapes provide for effective natural pest control in subtropical rice?

Zou

Kraker

Bianchi

et al. 2019

Journal of Applied Ecology

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1. While the biocontrol potential of natural enemies is well established, it is largely unknown how landscape-mediated effects on pest and natural enemy communities impact the cascade of biocontrol potential, crop injury, yield and profit, taking into account crop management and surrounding landscape composition.2. We compared natural biocontrol with chemical control according to local farmers' practice, across the 'full cascade' from natural enemy and pest abundance to crop injury, yield loss, yield and economic performance. This 2-year study was conducted in 20 rice fields embedded in a gradient of landscapes from crop-dominated to semi-natural habitat-dominated, in subtropical China, the world's largest rice-producing region.3. Natural enemies suppressed brown planthopper population growth in unsprayed plots, irrespective of landscape composition. However, crop injury was lower in pesticide treated plots than in unsprayed plots, and yields in sprayed plots were 20% higher than in unsprayed plots. Nevertheless, pesticide applications were only profitable in less than half of the cases when only costs for pesticides were considered, and in less than one third of the cases when costs for pesticides and labour were considered. Synthesis and applications.Our findings question the cost-effectiveness of current chemical-based pest management in farming, and highlight opportunities for more ecologically based pest management strategies based on the widespread activity of natural enemies. Pest damage and biocontrol, however, are largely independent from the landscape context, which might be due to the small-scale character of Chinese rice landscapes. To maintain high levels of biocontrol, conserving this small-scale character appears more important than increasing the proportion of semi-natural habitat.

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Section: Methodsmentioning

confidence: 99%

Do diverse landscapes provide for effective natural pest control in subtropical rice?

Zou

Kraker

Bianchi

et al. 2019

Journal of Applied Ecology

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“…In experiment 2, immediately after each observation round, the arthropod community in the field was sampled using a blower-vac (Oleo-Mac BV300, 30.5 cc) that was modified for arthropod sampling 53 54 . Each time, six samples were taken using a 40 cm diameter enclosure (0.13 m 2 ) and a suction time of two minutes.…”

Section: Methodsmentioning

confidence: 99%

Video monitoring of brown planthopper predation in rice shows flaws of sentinel methods

Zou

Kraker

Bianchi

et al. 2017

Sci Rep

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Immobilized preys are routinely used in agro-ecological exposure studies to quantify predation of pests under field conditions, but this method has not been validated. Our purpose was to determine the validity of using immobilized adults of the major rice pest Nilaparvata lugens, brown plant hopper (BPH), as sentinels. We used direct observation by video recording to determine the causal agents of removal of field exposed BPH sentinels with two experiments: 1) we recorded removal events of dead, immobilized BPH; and 2) we compared removal of (i) dead, immobilized BPH, (ii) live, immobilized BPH, and (iii) live, mobile BPH. Long-horned grasshoppers were responsible for most removals of dead, immobilized BPH, in both experiments. Predatory ground beetles removed most of the live, immobilized BPH, whereas frogs were the major predators of live, mobile BPH. Overall, we showed that removal of immobilized sentinel prey is not representative for predation of live, mobile prey, stressing the need for a critical assessment of commonly used sentinel methods. In addition, we found that frogs played the major role in predation of BPH in rice. As current strategies to enhance biocontrol of planthoppers in rice focus on arthropod natural enemies, this finding could have major implications.

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“…The B‐vac followed the design of Zou et al. (2016) with a nozzle of 3.6 cm in diameter and an air intake rate of 27 m/s.…”

Section: Methodsmentioning

confidence: 99%

“…D‐vac sampling has been used to compare the actual number of winged adults collected on canopies by aspiration to the sequential catches of D. citri on yellow sticky traps (Aubert & Quilici, 1988). However, D‐vac devices are relatively heavy and hard to handle, thus cheaper and easier to handle modified 'blower‐vacs' based on inverted leaf blowers raised as alternative for suction sampling (Zou et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Sampling and distribution pattern of Trioza erytreae Del Guercio, 1918 (Hemiptera: Triozidae) in citrus orchard

Benhadi‐Marín

Pereira

Rodrigues

et al. 2021

J Applied Entomology

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Developing efficient sampling protocols is essential to monitor crop pests. One vector of the citrus disease HLB, the African citrus psyllid Trioza erytreae Del Guercio, 1918 (Hemiptera: Triozidae), currently threatens the lemon industry throughout the Mediterranean region. In this work, a pool of sampling methods devoted to monitoring the population of T. erytreae was compared, its spatial distribution in the orchard was assessed, and the minimum sampling effort for the best sampling method was estimated. Three lemon orchards in North‐western Portugal were sampled for one year using two types of yellow sticky traps (standard yellow and fluorescent Saturn yellow), B‐vac sampling and sweep net sampling. The method that best performed, in terms of cost‐efficiency, was the yellow sticky traps. The two colours of the sticky traps tested did not yield a significantly different number of catches. The spatial distribution throughout the orchards was found to be aggregated towards the borders. A minimum of three sticky traps per hectare was found to be enough to estimate the population at 90% accuracy for the mean during the outbreak. These results should help to monitor and anticipate outbreaks that may even colonize neighbour orchards. Studies on the local dispersion patterns of T. erytreae throughout the orchard are mandatory to further refine and optimize efficient monitoring protocols.

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Modification and Application of a Leaf Blower-vac for Field Sampling of Arthropods

Cited by 11 publications

References 18 publications

Do diverse landscapes provide for effective natural pest control in subtropical rice?

Do diverse landscapes provide for effective natural pest control in subtropical rice?

Video monitoring of brown planthopper predation in rice shows flaws of sentinel methods

Sampling and distribution pattern of Trioza erytreae Del Guercio, 1918 (Hemiptera: Triozidae) in citrus orchard

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