DISPERSION PATTERN OF Helopeltis antonii Signoret (HEMIPTERA:MIRIDAE) ON CASHEW PLANTATION

SISWANTO, SISWANTO; Muhamad, Rita; Omar, Dzolkhifli; Karmawati, Elna

doi:10.21082/jlittri.v14n4.2008.149-154

Cited by 7 publications

(10 citation statements)

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“…Data of the vertical distribution of H. bradyi and O. javanus was analyzed based on the Poisson dispersion index (DI), negative binomial ( ), and Green Index (GI) by Ludwig and Reynold (1998), reported that insects will form a spatial distribution pattern clump naturally. Siswanto et al, (2008) also stated that Helopeltis has a clump distribution pattern in cashew plantations. Testing of this distribution pattern was through several stages: Ho was rejected from the Poisson distribution thus the insect population was not randomly distributed, the negative binomial test was used to justify if the targeted insect population was clump distributed, and the Green index was used as a further test to determine the grouping degree of the target insect population.…”

Section: Discussionmentioning

confidence: 99%

“…The pest distribution pattern has been widely investigated as basic information in the study of ecological characteristics and pest control management (Muraleedharan et al, 1988;Wagiman et al, 1998;Siswanto et al, 2008). The vertical distribution pattern of pests is important to be studied because it can affect sampling programs, describe the condition of the population, and can be used to analyze predatorprey relationships (Southwood, 1978).…”

Section: Introductionmentioning

confidence: 99%

“…The characteristics of predatory behavior to the distribution of prey can be studied vertically in host plants (Wagiman et al, 1998). According to Siswanto et al (2008), the spatial distribution pattern of H. bradyi is clump on cashew plants. Yet the research about the distribution pattern and coexistence between H. bradyi and their predators on tea plants has not been conducted.…”

Section: Introductionmentioning

confidence: 99%

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The Vertical Distribution of Helopeltis bradyi and Oxyopes javanus on Tea

Sari

Wijonarko

Wagiman

2019

JPTI

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Helopeltis bradyi is the main pest of tea plants. Ecological characteristics of this pest are important to be understood to support the development of their management and control measures. This study aimed to determine the coexistence and vertical distribution pattern of H. bradyi and its predator, Oxyopes javanus, on tea plant parts. The study was conducted at the PT Pagilaran tea plantation in Central Java, in the 2018 rainy season. Population observations were carried out in situ on 20 infested sample-trees taken randomly, for 10 consecutive days, in the morning, at noon, and in the afternoon. Vertical distribution patterns were determined based on Poisson dispersion index (DI), negative binomial, and Green index (GI). The results showed that the O. javanus spider was found preying on H. bradyi. Coexistence between this pest and predator in the same part of the plant, the pest, and the predator, occurred in the morning were 50.0, 42.8, and 7.2%; at noon were 58.3, 41.7, and 0%; and at the afternoon were 66.7, 33.3, and 0%, respectively. The parts of the plant for the coexistence are pekoe leaves; the 1st, 2nd, 3rd, and 4th of young leaves; and 1st of older leaves. The pattern of vertical distribution in the morning, at noon and in the afternoon for H. bradyi was the weak clump, while for O. javanus was uniform. The ratio of predator: prey in the morning, at noon and in the afternoon was 1:10.7, 1:16.7, and 1:10.0, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Vertical Distribution of Helopeltis bradyi and Oxyopes javanus on Tea

Sari

Wijonarko

Wagiman

2019

JPTI

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“…Kelimpahan populasi dan serangan hama H. hampei mempunyai hubungan yang kuat dengan persentase kehilangan hasil buah kopi di Kabupaten Simalungun, Provinsi Sumatera Utara (Purba et al 2015). Distribusi atau sebaran dan kelimpahan populasi merupakan atribut penting bagi populasi serangga (Siswanto et al 2008). Pengetahuan tentang pola sebaran hama H. hampei sangat penting dalam menyusun metode penarikan contoh yang akurat dan efisien untuk kegiatan pemantauan populasi dan kerusakan buah kopi arabika Gayo.…”

Section: Pendahuluanunclassified

Populasi, Serangan, dan Sebaran Hama Hypothenemus hampei pada Kopi Arabika Gayo

Hendrival

Nurdin

Usnawiyah

et al. 2022

Agrotechnology Res J

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Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) or Coffee Berry Borer (CBB) is the most destructive major pest that causes quantitative and qualitative losses in Arabica coffee. The research aimed to calculate population, attack H. hampei, coffee yield losses, the measure distribution pattern of H. hampei on various Gayo arabica coffee varieties, and the analyze estimated decrease in the production of coffee based on population and attack H. hampei in Gayo arabica coffee. The location chosen as a place of observation and sampling is a smallholder coffee plantation with variations in elevation. Each area is determined by two points of observation and sampling locations. At each sampling location, 80 ripe or red coffees were taken, 80 dark or yellow coffees, and 80 young or green coffees (24 pieces per four branches per tree). The results showed that the population and attack of CBB pests on Gayo 3 varieties are relatively high compared to Gayo 1 and Gayo 2 varieties. The distribution pattern of CBB on all varieties of Gayo Arabica coffee showed an aggregated distribution based on population and attack. The decrease in arabica coffee production has the potential to occur on a variety Gayo 3.

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“…These results agree with that obtained by Southwood [41] stated that the higher the variance to mean ratio, the greater the extent of aggregation. Siswanto et al [42] however with different insect species and different host, also suggested that when the population of Helopeltis antonii (Signoret.) (Hemiptera:…”

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confidence: 99%

Abundance, Generation Determination and Spatial Distribution Pattern of the Sunt Wax Scale Insect, Waxiella Mimosae (Signoret) (Hemiptera: Coccidae) Infesting Sunt Trees in Luxor Governorate, Egypt

Bakry

2018

CIACR

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The present work was carried out throughout two successive years (2016/2017 and 2017/2018) at Esna district, Luxor Governorate. As a basic study for developing future management of the sunt wax scale insect, Waxiella mimosae (Signoret), to determine the seasonal abundance of this pest and its spatial distribution pattern. The obtained results showed that insect population occurred on sunt trees all the year round and has two overlapping generations a year under field conditions. The first generation occurred in autumn season, started in September 10 th and extended until March 10th in the two years and covered a period of 24 weeks per year and its peaked in November 10 th and October 25 th during the two years, respectively. Whereas, the second generation recorded in spring season, observed between the period in February 25 th to August 25 th , peaked in May 10th and its duration 24 weeks per year in the both years. In general, the population density was varied in the two generations; the spring generation of pest was the biggest one in size than the autumn generation during the two years.The obtained results showed that the favorable time for abundance and maximum values of total population density of W. mimosae, were recorded in autumn and spring months and were the optimal for the insect multiplication and build up, since the highest R.M.V.P values was achieved during the both two years. Lowest activity of population was recorded during winter months (this referred to the cold weather) during the two years. Also, the percentages of the age-structure population of W. mimosae species, during the both two years, were almost similar. However, the insect age-structured population was considerably differed among between months and between the two years. Data were analyzed using fourteen indices of dispersion to estimate the spatial distribution pattern of this pest. All models of dispersion indices exhibited an aggregated distribution and follows a negative binomial distribution pattern for all alive different stages and total population of W. mimosae in all seasons of the year and on the over year during the two years of study.

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DISPERSION PATTERN OF Helopeltis antonii Signoret (HEMIPTERA:MIRIDAE) ON CASHEW PLANTATION

Cited by 7 publications

References 0 publications

The Vertical Distribution of Helopeltis bradyi and Oxyopes javanus on Tea

The Vertical Distribution of Helopeltis bradyi and Oxyopes javanus on Tea

Populasi, Serangan, dan Sebaran Hama Hypothenemus hampei pada Kopi Arabika Gayo

Abundance, Generation Determination and Spatial Distribution Pattern of the Sunt Wax Scale Insect, Waxiella Mimosae (Signoret) (Hemiptera: Coccidae) Infesting Sunt Trees in Luxor Governorate, Egypt

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