Minimum and pests

During the investigation sucking pest viz; white fly and jassid were appeared in 33 standard meteorological week and maximum population of whitefly (0.60 per plant) and jassid (0.40 per plant) was recorded in 37th SMW. Correlation with sucking pest (whitefly and jassid) population and meteorological parameters was found positive non significant association with evening relative humidity and minimum temperature but negative correlation with maximum temperature, morning relative humidity and rainfall.

8p caygaocaolon11 21-04-2021 11 1   Download

The present field studies were conducted during kharif 2016 to determine the field efficacy of selected insecticides and neem products against shoot and fruit borer [Earias vittella (Fabricius)] on okra [Abelmoschus esculentus (L.) Moench]” at Central agriculture field, SHUATS (Sam Higgin bottom University of Agriculture, Technology and Sciences), Allahabad, Uttar Pradesh (India).

7p nguathienthan8 20-10-2020 11 2   Download

Fall armyworm Spodoptera frugiperda is an invasive alien pest that attacks mainly maize crop. Influence of weather parameter on the incidence of S. frugiperda larva on maize was studied during 2019-2020 at Cauvery Delta Zone, Tamilnadu, India. Random survey was conducted in six maize growing areas and correlation between larval population and weather parameters like maximum temperature, minimum temperature and rainfall was worked out. The larva population had significant positive correlation of both same (r = 0.32 to 0.45) and previous week (r = 0.21 to 0.52) at all the locations.

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Investigation on seasonal incidence of sucking pest of okra and its relationship with weather parameters was carried out at Instructional Farm, College of Agriculture, Junagadh Agricultural University, Junagadh, Gujarat during summer 2016 and 2017. The data revealed that peak population of jassid (16.1 jassid/3leaves) and whitefly (15.7 whitefly/3 leaves) was observed at 17th and 16th standard meteorological week of summer 2016, respectively. Whereas, in summer 2017 the peak population of aphid (17.8 aphid/3 leaves) was observed at 16th standard meteorological week.

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The experiment was conducted during Rabi 2016 at horticultural farm, college of agriculture, Kolhapur. The incidence of leaf hopper (Amrasca biguttula biguttula) was maximum during January, 1st Standard Week (SW) and minimum during February (8th SW). The incidence of white fly (Bemicia tabaci) was maximum during January, 1st Standard Week (SW) and minimum during February (8th SW). Both these insects showed significant negative correlation with both maximum and minimum temperature while a positive correlation was revealed with mean relative humidity.

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Recognising the pattern of pest infestation helps greatly to understand the changes in the population dynamics due to several biological, environmental and climatological factors. As data are count in nature, suitable choice of distribution as well as linear or non-linear growth models are obvious to capture the variability present the population. If data are not properly fitted, integrity of scientific inference will be at stake. Hence, in the present study, an attempt has been made to fit appropriate discrete distributions along with the usual linear and non-linear modular approach.

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The present study was conducted at Budni block of Sehore district of Madhya Pradesh. The findings of the research revealed that, improved production technology of Basmati rice growers, the extent of adoption was found to be maximum (43.64 %) in case of transplanting and harvesting. On the other hand nursery management and pest management practices showed minimum extent of adoption (25.46 %).

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The main aim of the study was to reduce the maximum use of pesticides, these pesticides increases pest resurgence, environmental pollution and toxic residue in food. Efforts were being made to encourage those pest management practices which are ecofriendly. Pooled mean of both the years during 2016 and 2017 revealed that minimum population of leafhopper nymphs was recorded in cotton intercropped with bajra as border crop (2.47 nymphs/leaf) and maximum population was recorded in sole cotton (3.54 nymphs/leaf).

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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.

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Pigeonpea (Cajanus cajan) is a often cross-pollinated, diploid, grain. It is the fourth most important food legume in the world after dry bean (Phaseolus vulgaris L.), field pea (Pisum sativum) and chickpea (Cicer arientinum L.) The present study on marketing cost, marketing margin and price spread of pigeonpea was conducted in Latur market. For the present study different marketing channels, marketing margins, price spread and producers share in consumer’s rupee were calculated. The study was conducted for the year 2017-2018 in Latur market.

6p caygaocaolon3 27-02-2020 15 0   Download

The estimation of crop yield before harvest helps in different policy making in an order for storage, distribution, marketing, pricing, import-export etc. Crop productions depend on several factors such as weather factors, plant characters and agricultural inputs. The present study was carried out to develop the appropriate statistical model for estimation of rice yield before harvest in the year 2018-19. This research was done on plant biometrical characters along with farmer’s appraisal.

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Present study was investigated to elucidate the role of antioxidative enzymes in imarting resistance to sucking pest attack. Antioxidative enzymes viz. SOD, CAT, POX, GR and APX were estimated in the leaves (2nd leaf & 6th leaf) of cotton genotypes infected by sucking pests at 50, 60 and 68 days after sowing (DAS) stage. The antioxidative enzyme activity before infection was maximum in 2nd & 6 th leaves of G. arboreum genotypes followed by G. hirsutum resistant genotypes and minimum in G. hirsutum susceptible genotypes.

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The study had been carried out in the semi-arid region of India at Agronomy farm, S.K.N. College of Agriculture, Jobner (Rajasthan) during Kharif 2018. The insect pests, aphid (Aphis craccivora Koch) and leafhopper (Empoasca kerri Pruthi) were observed as major sucking insect pests infesting on groundnut crop. The aphid and leafhopper population commenced in the last week of July and reached to its peak in the second week of September, when the maximum temperature, minimum temperature, relative humidity and rainfall were 30.0 oC, 21.0 oC, 78% and 1.6 mm, respectively.

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A comparative assessment of spray efficacy of different bio-control agents such as Beauveria bassiana (Bb), Trichoderma viridae (Tv), Pseudomonas fluroscence (Pf), Verticillium lecanni (Vl), Metarhizium anisopliae (Ma) were tested in different combinations along with neem soil and chemical insecticides like imidachloprid and Acephate on major insect pest of green gram (Vigna mungo L).

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A field experiment on “Effect of INM on growth, yield and quality of Okra [Abelmoschus esculentus (L.) Moench]” was conducted at the instructional farm of Krishi Vigyan Kendra Jajpur situated at Badachana. The experiment was conducted to find out the best suited integrated nutrient management practices for reducing incidence of disease and pest. The experiment was laid out in randomized block design (RBD) with three replications and twelve treatments.

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Shoot and fruit borer (Leucinodes orbonalis G.) is one of the most destructive pests in brinjal in South Asia. Studies on effectiveness of different chemical insecticides against shoot and fruit borer causes 20 – 60% yield reduction was evaluated under field condition at Agricultural College and Research Institute, Killikulam, Thoothakudi during kharif from July 2018 to October 2018. Shoot and fruit infestation were minimum in Spinosad 45 SC treated plots with the per cent of 9.94 in shoots and 11.71 in fruits when compared to the untreated check (30.99%).

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Pigeonpea is an important pulse crop is known to attack by wide range of insect pests from seedling stage to storage. Among these, recently gall weevil causing threat to pigeonpea at seedling stage. Results revealed that pigeonpea late sown crop will suffer much with more than 73.30 percent damage and the early sown crop escapes with only 30 percent damage at 30 DAS. The rainfall and minimum temperature showed negative correlation(-0.344, -0.330 with minimum temperature at 20 and 30 DAS, -0.658, -0.

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The field experiment was conducted at main experimental station of Narendra Deva University of Agriculture and Technology, Kumarganj Faizabad (U.P.) during the season kharif, 2015 to know the occurrence and abundance of insect-pests of paddy on rice crop was monitored on rice variety Pusa Basmati. This investigation revealed that pest activity commenced from 31th Standard meteorological week (SMW) and continued upto 49th SMW.

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Cabbage, crop label, organophopshates, diamides and chlorantraniliprole Resultantly, in cabbage growing ecosystem of Karnataka as many as 33 insecticides are being used, in which 58 % insecticide are not having crop label. Majority of Bidar, Belagavi, Raichur, Chikmagalur and Hassan district farmers were relied on organophosphate insecticides to manage insect pest in cabbage crop while Bengaluru, Mysuru and Chamrajnagar districts farmer are mainly dependent on diamides and combination products for the management of cabbage pests.

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A pot culture experiment was undertaken during kharif, 2017 on evaluation of induced mechanism of zinc in rice for expression of tolerance against white backed plant hopper (WBPH) in the Department of Entomology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar. It was revealed that basal application of Zn EDTA @ 40 kg/ha along with its foliar spray @ 0.8%, twice at 30 and 45 days after transplanting (DAT) (T6) expressed fair degree of tolerance against WBPH.

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