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Rice Growth Stages and Temperature Affect the Abundance of Leaf Hoppers and Plan Thoppers

M.O. Faruq
Department of Entomology, Patuakhali Science and Technology UniversityDumki, Patuakhali-8602, Bangladesh

M.M.H. Khan
Department of Entomology, Patuakhali Science and Technology UniversityDumki, Patuakhali-8602, Bangladesh

M.A.Rahman
Department of Entomology, Patuakhali Science and Technology UniversityDumki, Patuakhali-8602, Bangladesh

M.H. Ullah
Department of Entomology, Patuakhali Science and Technology UniversityDumki, Patuakhali-8602, Bangladesh

Abstract/ Executive Summary:

Relative abundance of leaf and planthoppers species regarding plant growth stages and temperature were studied in the ricevariety BINA10 field at the research farm of Patuakhali Science and Technology University (PSTU) during October 2013 to April 2014.The percent relative abundance of leafhoppers was in the rank order of M. dorsalis> C. brevis> N. virescens> N. malayanus> N. cincticeps> N. nigropictusat seedling, early and maximum tillering stages while N. virescens> C. brevis> M. dorsalis> N. nigropictus> N. malayanus> N. cincticepsat reproductive stage. The percent relative abundance of planthoppers was in the rank order of N. nervosa> N. lugens> S. furciferaat seedling and reproductive stages while N. lugens> N. nervosa> S. furciferaat early tillering and N. nervosa> S. furciferaand N. lugens at maximum tillering stages. The abundance of all leafhopper species showed highly negative relationship with temperature. This relationship can be expressed by 81% (R2=0.806) for N. virescens, 80% (R2= 0.801) for N. nigropictus, 65% (R2=0.653) for N. cincticeps, 60% (R2=0.600) for C. brevis and 70% (R2=0.698) for M. dorsalis. Among three planthopper species, population of S. furcifera showed highly negative relationship with temperature and this relationship can be expressed by 71% (R2=0.707). The abundance of N. nervosa showed poor positive relationship with temperature. This relationship can be expressed by 3 % for N. nervosa (R2=0.030). N. lugens showed poor negative relationship with temperature and this relationship can be expressed by 31% (R2=0.310) for N. lugens.

Keywords: BINA dhan10, Growth stage, Leafhopper, Planthopper, Temperature

Location: Patuakhali Science and Technology University (PSTU)

Start Date: 00-10-2013

End Date: 00-04-2014

Program Area: Pest Management

Commodity: Insects, Rice

Objectives:

The present study was undertaken to know the abundance of leaf and planthoppers on different growth stages of rice variety BINA dhan10 at different temperature.

Methodology:

The field study was undertaken in some selected rice fields in the research farm of Patuakhali Science and Technology University (PSTU) during October 2013 to April 2014. The laboratory works were carried out in the Department of Entomology, Patuakhali Science and Technology University, Dumki, Patuakhali on the taxonomic classification, identification of different species of rice leafhoppers and planthoppers. The rice variety BINA dhan10 was used as study material. The experiment was designed in a randomized complete block design with 3 replications. Each rice field was treated as treatment replication. In such a way, three rice fields were used as three replications in the study.The different species of leafhopper and planthopper were collected by a fine mesh nylon sweep net. Sweeping was done from the plant canopy level including the inter spaces between plants as well as close to basal region of the plants as far as possible. In each field, l0 complete sweeps were made to collect hopper populations. Sampling was done at four stages of rice viz. seedling, early tillering(initial tillering), maximum tillering (prior to booting stage) and panicle initiation stage. Sampling was done during morning hours at all study fields on all sampling dates. The samples of l0 complete sweeps from each field were collected and preserved separately in labeled container. The samples were sorted, counted and identified in the laboratory of the Department of Entomology, PSTU under microscope. The relative abundance of leafhoppers and plant hoppers were calculated. Relative abundance Relative abundance of insect pests was calculated using the following formula: Relative abundance (%) = Total number individuals of each species/Total number individuals of all species x 100. The collected data were analyzed statistically by using the MSTAT-C computer package. The treatment means were compared by LSD test.

Source of Information: SAARC J. Agri., 16(1): 95-104(2018)

Article Link (Online Journal): DOI: http://dx.doi.org/10.3329/sja.v16i1.37426

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest populations of leafhoppers were in seedling stage and the lowest in early tillering stage. The highest numbers of plant hoppers population were found in seedling stage and the lowest numbers were in reproductive stage. All leafhopper species and one plant hopper species S. furcifera showed highly negative relationships with temperature. Plant hopper species N. nervosa showed poor positive and N. lugens showed poor negative relationships with temperature.

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