Sanjaya Bista

• Ph. D. Agriculture Entomology
• Senior Entomologist at Nepal Agricultural Research Council

Buckwheat is one of the crops on which pollination services from honeybees and other insect pollinators are necessary for obtaining quality and higher grain yield. Increasing plant biodiversity is an important strategy to attract and restore pollinators in an agro-ecosystem. Among many ways to increase plant biodiversity, the present study aimed to...

Preliminary surveys for Dacine fruit flies were carried out in May 2015 and June 2017, with male lure (cue-lure, methyl eugenol, zingerone) traps maintained at 55 sites, (110-1,780 m elevation range), comprised mostly of Nepal Agricultural Research Council research stations. Twenty species were collected, including 11 new country occurrence and 2 n...

Predatory hornets are considered as one of the major constraints to beekeeping industry. Therefore, its incidence and predation rate was studied throughout the year at two locations- rural and forest areas of mid-hill in Laliptur district during 2016/017 to 2017/018. Observation was made on the number of hornet and honey bee captured by hornet in t...

The predatory hornets have become one of the major limiting factors for commercial beekeeping. So, its incidence and predation rates were investigated at two different locations of subtropical plain areas of Parasi district, Nepal during five major hornet active months for 2016 and 2017. Observations were carried out on five Apis mellifera L. colon...

The ecto-parasitic mite, Tropilaelaps mercedesae Anderson and Morgan is one of the major limiting factors for both subsistence and commercial Apis mellifera Lin. beekeeping in Nepal. Its management by the beekeepers with chemical application regularly causes resistance in mite and contamination in bee products. So, an investigation was undertaken t...

South American tomato leaf miner, Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) is key and invasive pest of Tomato. This pest was recorded for the first time in Nepal from a commercial tomato farm of Kathmandu during May 2016. Tuta absoluta was identified studying external morphology and male genitalia in Entomology Division, NARC, Nepal...

Water hyacinth, Eichhornia crassipes (Mart.) threatens aquatic ecology of Nepal. Field survey was carried out to determine the growth attributes of water hyacinth and associated herbivore on different lakes of Kaski viz. Fewa, Rupa and Beeshazari and associated lakes of Chitwan in June 2012. The wetlands of eastern terai were also surveyed durin...

The field of agriculture entomology is one of the most essential components for overall agricultural development. Ever changing cultivation practices and new environmental issues have evolved emergence of new pest threat to many agricultural commodities. This fact is evident during different local and regional agricultural meetings with stakeholder...

explains on in details methods for managing rice ear head cutting catterpillar. This is based on action research result. Follow journal article for more details

Coloration of stinging insects is often based on contrasted patterns of light and black pigmentations as a warning signal to predators. However, in many social wasp species, geographic variation drastically modifies this signal through melanic polymorphism potentially driven by different selective pressures. To date, surprisingly little is known ab...

Adequate knowledge about bee flora is the prerequisite to initiate bee keeping. A study was conducted at Kabre area of Dolakha district during 1997-1999 to identify existing bee flora and develop a floral calendar. Based on the interview with bee farmers and visual observations, 119 important plant species were recorded, out of which 47 species wer...

Criocerine leaf beetles found in Nepal feeding on Dioscorea bulbifera (L.), an invasive weed of Asian origin, were identified as Lilioceris cheni Gressitt and Kimoto based on a synopsis of the Oriental Lilioceris species and review of the Lilioceris impressa species group. All the continental, Oriental species included in the group are diagnosed an...

Experiment was conducted to assess the optimum interaction between common silkworm races (J-12 and C-12) with different mulberry varieties (Kanva-2, Lun-40, K-22, Khumal-1 and Khumal-3) at humaltar, Lalitpur during the year 2004/05 and 2005/06. The bud initiation and senescence characteristics were found superior in Kanva–2 among the tested cultiva...

Vegetable farming has become a profitable business along the roadside of mid-hills of Nepal,Dhusatar VDC of Dhadhing is one of the vegetable farming pockets located in mid-hill Just 82 km away from the capital (Kathmandu). A study was carried out in Dhusatar pocket during 1999 through focus group discussion and household survey methods in order to...

A survey was carried out in vegetable pocket areas of Dhankuta, Baglung, Dhading (mid-hills) and Bara (terai) Districts with an objective to find out the magnitude of pesticide use in different vegetable crops. A total of 25-35 vegetable farmers were interrogated from each district using semi-structured questionnaires. Efforts were made to gather i...

Chemical pesticides were introduced in Nepal around 1950s for malaria eradication program. Later on these chemicals were utilized for the control of agricultural pests too. The result was so convincing that their uses started increasing. At the same time the government and other related extension agencies also encouraged the use of pesticides, espe...