Spider population

Research goals were to study different irrigation schedules to determine how this factor influence the reproduction, population buildup and development of two spotted spider mite on various host plants okra, eggplant and tomato.

8p gaocaolon9 22-12-2020 11 2   Download

Field investigation was carried out during rabi seasons of 2017-18 at the farmer’s field, Allengmora, Jorhat to study the effect of weather parameters on population buildup of some predators on brinjal ecosystem.

4p trinhthamhodang1216 19-11-2020 17 2   Download

Predators are important links in the food chain and are needed to maintain herbivore population in crop ecosystem in check. However, like other insects, they are also vulnerable to various weather factors, which impedes the natural control that they contribute to the ecosystem. Information on impact of weather factors on predators helps to understand natural control better and also formulate integrated pest management practices.

9p trinhthamhodang1216 19-11-2020 17 1   Download

A field experiment was conducted on marigold (Tagetes erecta L.) to evaluate few insecticidal molecules, viz., novaluron, carbosulfan, imidachloprid, bifentrhin, methyl-o-demeton, chlorpyriphos dust, neem oil, propargite and thiamethoxam alone against the field populations of Tetranychus urticae Koch during 2014 and 2015 at the Research Farm, Sher-e-Kashmir University of Agricultural Sciences and Technology, Jammu, India.

7p nguathienthan8 20-10-2020 16 2   Download

The study on seasonal incidence of summer okra as influenced by weather parameters on aphid, lady bird beetle and syrphid fly showed its peak presence during 16th MW and maximum population of chyrsopa during 17th MW, predatory spider during 20th MW. The correlation studies indicated that aphid showed positively significant correlation with bright sunshine and negatively significant correlation with rainy days.

11p kethamoi6 29-06-2020 17 1   Download

Cyantraniliprole 10% OD at 90 g a.i.ha-1 was significantly effective when sprayed twice at 15 days interval, minimized the sucking pests population and increased cotton kapas yield. Cyantraniliprole 10% OD treatments at 90, 180 and 320 g a.i. ha-1 concentrations had not caused any phytotoxic effects like injury to leaf tip, leaf surface, wilting, vein clearing, necrosis, epinasty and hyponasty. Cyantraniliprole 10% (w/v) OD showed the least effect against the spiders.

13p nguaconbaynhay6 24-06-2020 9 1   Download

Seasonal incidence of different sucking pests of chilli viz., thrips (Scirtothrips dorsalis Hood), mites (Polyphagotarsonemus latus Banks), Aphid (Aphis gossypii Glov.), Whitefly (Bemesia tabaci Genn.) and Jassids (Amrsca bigutula bigutula) and natural enemies like Coccinellids and spiders were worked out in the present study during 2016 at District Seed Farm (AB Block) of Bidhan Chandra Krishi Viswavidyalaya located at Kalyani, Nadia, West Bengal. Peak population of thrips was recorded to be in 18th standard week i.e. 12.

13p angicungduoc5 12-06-2020 20 0   Download

The investigation was carried out at Horticulture research farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during Rabi-summer, 2014-15 and 2015-16. The mean data revealed that among the treatments, during first season DIFACE 600 ml/ha (Difenthiuron50% WP + Acetamiprid 20% SP) recorded the mean of lowest population 3.29 and 3.35 thrips/3 leaves per plant as against 9.33 and 9.43 thrips in untreated check, respectively after first and second spray.

11p nguathienthan5 04-06-2020 14 1   Download

A field trial was conducted during the kharif, 2016 at Vegetable Research Centre, Pantnagar to study the correlation of the sucking pest population viz. leafhopper (Amrasca bigutullabigu tulla Ishida), whitefly (Bemisiatabaci Gennadius) and aphids (Aphis gossypii Glover) and their predators mainly Coccinella spp. and spiders with the prevailing weather conditions. The peak densities of insect pests and their predators were attained in September-October.

6p trinhthamhodang1213 29-05-2020 6 0   Download

To evaluate the effectiveness of different doses of spiromesifen 22.9 SC against brinjal mite, an experiment was conducted in the field of Main Vegetable Research Station, Anand Agricultural University, Anand (Gujarat) during the season of kharif-rabi, 2016-17. Two different doses of spiromesifen 22.9 SC of Meghmani Organics Ltd. with two doses of marketed product of spiromesifen @ 96 and 192 g a.i./ha were evaluated against brinjal mite. The tested product of Meghmani Organics Ltd. i.e. spiromesifen 22.9 SC @ 192 g a.i.

7p nguaconbaynhay5 16-05-2020 18 1   Download

The study on “Incidence of sucking pests and natural enemies in cotton under high density planting system (HDPS)” was conducted at RARS, Lam, Guntur during kharif, 2016-17 to observe the incidence of sucking pests such as leafhoppers, aphids, thrips and whitefly and also the incidence of natural enemies (Spiders and Coccinellids). Among the sucking pests thrips population was found dominating other sucking pests during initial days of crop growth period i.e., up to 90 DAS there after aphid population was dominated i.e., from 90- 135 DAS both in normal and HDPS.

8p kequaidan4 05-05-2020 11 1   Download

In the present studies three insect pests viz., blue bug, Chrysocoris purpureus (Westw), leaf webber cum fruit borer, Pempelia morosalis (Saalm Uller) and broad mites, Euseius sp were recorded as major pests. Along with this spider, Oxyopes lineatipes was recorded as predator. The pest succession studies revealed that mean maximum and minimum population of C. purpureus was recorded in 1st fortnight of September (34.24) and 2nd fortnight of October (19.36), nymph and adult / plant, respectively. Mean maximum population of webber was recorded in the month of June 1st fortnight (39.

6p trinhthamhodang4 22-03-2020 15 2   Download

The field experiment was conducted at College farm, College of Agriculture, Rajendranagar, Hyderabad during Rabi 2017-18 to evaluate the effect of different cultivation systems on incidence of spiders, coccinellids and per cent parasitisation in paddy with four treatments and three replications, taking TN1 as test cultivar and following the recommended package of practices under each cultivation systems.

7p caygaocaolon3 27-02-2020 14 0   Download

In order to study the effects of repeated use of various insecticides on thrips and their natural enemies viz., Ladybird beetle and Predatory spiders, an experiment was conducted during Kharif, 2018-19at the Experimental farm, Department of Agricultural Entomology, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani. The insecticides selected included those used commonly among the farmers viz., Imidacloprid 17.

13p cothumenhmong3 22-02-2020 17 0   Download

A study on eco friendly management of Rice bug, Leptocorisa acutaunder upland rice by using organic pesticide was taken inOnattukara Regional Agricultural Research Station, Kayamkulam. Randomized block design with seven treatments and three replications were chosen which include 3 botanicals (1% azadirachtin 0.003%, cashew nut shell liquid 0.1% and dasagavya 3%), one microbial agent (chitin based Pseudomonas 2.5 kg ha-1 ), one animal origin pesticide (fish jaggery extract 0.6%) and one check insecticide (Malathion 50 EC 0.1%) and untreated control plot.

9p quenchua2 15-12-2019 10 0   Download

An experiment of rubber plants intercropped with tea was conducted at the Regional Experiment Station, Nagrakata, Jalpaiguri district of West Bengal to see the feasibility of growing tea as intercrop with rubber in Dooars area of north Bengal. It can be concluded that tea can successfully be grown as beneficial intercrop in between the inter-row spaces of rubber by changing in the crop geometry during immature phase of rubber with additional benefit of less attack of red spider mite to tea crop/leaf.

7p kequaidan2 13-12-2019 20 1   Download

The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) has emerged as an important agricultural pest in a wide range of outdoor and protected crops worldwide. Fenazaquin is METI-acaricide which is used extensively and frequently for the management of this mite has resulted in the development of resistance. So, present studies were conducted to investigate molecular characterization and genetic analysis based on mtCOI sequence between fenazaquin resistant and susceptible population of T.

10p cothumenhmong1 11-12-2019 6 1   Download

Mites pose an increasing threat to grape cultivation in grape growing areas in Telangana and Andhra Pradesh causing heavy loss in the field. Mites which are minor pests earlier in grapes have become serious, particularly before harvest of the crop in the recent years. Two species viz., Tetranychus urticae, and Eutetranychus orientalis are found causing damage to grapevine both in Telanagna and Andhra Pradesh. Among them, the two spotted red spider mite T. urticae causes severe loss.

7p nguaconbaynhay1 04-12-2019 13 1   Download

Since the greenhouses around Isparta province where the two-spotted spider mite populations were collected have recently been constructed, the populations used in this study were not exposed to excessive acaricides and had had no important loss of susceptibility to the acaricides applied in the study.

7p masterbarista 14-01-2019 24 1   Download

Domain-specic internet portals are growing in popularity because they gather content from the Web and organize it for easy access, retrieval and search. For example, www.campsearch.com allows complex queries by age, location, cost and specialty over summer camps. This functionality is not possible with general, Web-wide search engines. Unfortunately these portals are dicult and time-consuming to maintain. This paper advocates the use of machine learning techniques to greatly automate the creation and maintenance of domain-specic Internet portals.

46p bin_pham 05-02-2013 52 4   Download