Journal of Entomology and Zoology Studies 2017 5 5 795 799

Journal Of Entomology And Zoology Studies 2017 5 5 795 799-Free PDF

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Journal of Entomology and Zoology Studies, may be short giving plants a stunted or tufted appearance and stages of yellow mite were recorded from each of the. the mite injects toxins even during their feeding 3 7 18 The replicated plots of each treatment as pre treatment count and. information regarding the varietal performance of different there after the mite population count was taken at 1 3 5 and 7. gerbera cultivars against yellow mite and scheduling its days after application of treatment The mite population was. management strategy under Gangetic Basin of West Bengal counted under a binocular microscope in the laboratory as. has not been conducted Therefore considering the described earlier The count data of post embryonic stages of. importance of the crop and severity of yellow mite infestation yellow mite before and after spraying with different. on a regular basis the present investigation was carried out formulations of acaricides had been used to work out the. with the objectives to i study the population dynamics of the corrected per cent mortality using the formula. yellow mite species on susceptible cultivar Jaffana for its Percent reduction 1 Ta Cb Tb Ca 100. monitoring and ii development of management strategy Where Ta Population in treated plants after treatment Cb. against the mite under polyhouse condition Population in treated plants before treatment T b Population. in control plots after treatment Ca Population in control. 2 Materials and Methods plots before treatment,2 1 Study period and location. The experiment was carried out at Horticultural Teaching 2 4 Statistical analysis. Farm of Bidhan Chandra Krishi Viswavidyalaya located at The corrected per cent mortality data of adult yellow mite was. Mondouri Nadia West Bengal during 2015 2016 The taken at different dates after spraying with different pesticides. experimental site is geographically located at 22 56 32 N and it was then transformed using Arcsine transformation. latitude and 88 30 51 E longitude and at an elevation of 9 75 Once the transformation had been made the transformed data. meters above mean sea level and the land are referred as was then subjected to CRD analysis and testing for the. fertile loamy soil with flat table top topography under significance of treatments was made DMRT Duncan. Gangetic Basin of West Bengal Multiple Range Test was done to compare the means. 2 2 Relationship of population dynamics of mite with 3 Results. different abiotic factors 3 1 Damage symptom due to attack of yellow mite. For studying the population dynamics of the mite the most In the present study yellow mite was found to infest the. susceptible cultivar Jaffana was selected The experiment was ventral surface of the young soft apical leaves The females. laid out in a completely randomized design and gerbera were observed to lay eggs mainly under surface of young. seedlings were transplanted in the plots of 15m 6m with 3 apical leaves The male carried the quiescent female to the. replications for the variety under polyhouse condition For apical leaves for shifting colony All the active stages viz. recording data on mite population 10 plants from the variety larvae and adults were observed to suck cell sap from the. was considered in each replication and from each of the under surface of leaves and from flower buds As a result of. selected plants a leaf was plucked to estimate the mean mite continuous feeding leaf margins to curl and were become. population The leaves were taken to the laboratory by brittle shriveled and puckered infested leaves become. wrapping within closed mouth polypropylene packets stored cupped curled dwarfed and thickened Leaves and flowers. in an ice box A four sq cm block made of iron wire was become discolored bronzed or stiff. used and it was placed on three different spots randomly on. the ventral surface of the representative leaf and then the 3 2 Role of abiotic factors on population dynamics of mite. population was counted under stereo zoom binocular It was revealed from the Table 2 that a significant positive. microscope During the study the population of post correlation was established between mite population and. embryonic stages was measured and correlated with different maximum temperature minimum temperature and average. abiotic parameters of environment like maximum temperature and the correlation values were highly significant. temperature minimum temperature mean temperature in case of maximum and average temperature and significant. maximum relative humidity minimum relative humidity in case of minimum temperature and the values were 0 745. mean relative humidity and sunshine hour recorded under 0 682 and 0 594 respectively Likewise the results revealed. green house condition Multiple regression equations were that there was positive correlation existed between mite. also developed by multiple regression analysis population and maximum relative humidity mite population. and minimum relative humidity and mite population and. 2 3 Selection of chemical acaricide molecules for average relative humidity The correlation values were 0 596. management of yellow mite 0 429 and 0 522 respectively which were significant in case of. The most susceptible gerbera variety Jaffana was considered maximum and average relative humidity but non significant. for evaluating the efficacy of different acaricides molecules in case of minimum relative humidity The correlation. against the yellow mite where subsequently two rounds of between mite population and sun shine hour were positive and. sprays were applied to find out the efficacy of chemical it was 0 325 which was non significant From multiple. acaricides against mite Eight acaricide molecules like Dicofol regression analysis Table 3 equation was developed like Y. 18 5 EC Diafenthiuron 80WP Sulphur 80 WP Mean yellow mite population per leaf 156 266 3 846. Prophenophos 50 EC Spiromesifen 5 EC Fenazaquin 10 EC Max Temperature 0 467 Min Temperature 2 128 Max. Ethion 50EC and Chlorfenapyr 10 SC Table 1 were selected RH 1 129 Min RH 0 085 Sunshine Hour We can say. for evaluating their efficacy against the yellow mite The only intercept wss significant in the regression equation above. experiment was conducted in plots of 5m 4 5m with three defined. replications for each of the treatments For each chemical. treatment 30 numbers of plants were considered and these 3 3 Bioefficacy of acaricides. were planted in 10 different lines of 5m 0 5m Two rounds The result of management experiment revealed after two. of sprays were applied at 14 days interval Post embryonic round spray that all the treatments were superior to control It. Journal of Entomology and Zoology Studies, was observed application of sulphur 1600gm ai ha was In tropical and subtropical areas the broad mite reproduces. very promising and gave the best result for maintenance of throughout the year and in temperate regions it occurs in the. low mite population with 99 98 mortality followed by green houses as the mite can t tolerate severe cold in the field. dicofol 277 5 gm a i ha that resulted in 99 97 mite The population level of yellow mite was directly. mortality diafenthiuron 800gm a i ha showed 99 96 mite proportional to the temperature and inversely proportional to. mortality followed by fenazaquin 100 gm a i ha and precipitation on Sicilian lemon crop and population attained. spiromesifen 500 gm a i ha rendered 98 94 and 95 37 in peak during December January 1995 and 1996 and. mortality respectively Table 4 The acaricide molecule October November 1997 28 The increase of population of. ethion 1ml lt registered the least mortality 47 72 P latus influenced by temperature and growth conditions of. plants 21 The population dynamics was studied under green. 4 Discussion house condition when both RH and temperature were. Broad mite attack was found worldwide like in India Ceylon recorded high and probably due to this reason mite population. called as yellow tea mite Bangladesh called as yellow jute was found higher and gradually it was found decreasing when. mite Rummania called as broad spider and also on various temperature tend to become lower to some extent and RH was. crops viz Jute Cotton Zinia Marigold Dalhia Datura observed to decline with the weather change From the. Amaranthus cluster bean chilli potato tomato brinjal multiple regression analysis it can be concluded that the data. cucurbits tea cowpea sowrd bean lablab dew gram horse of weather parameters altogether contributed 66 on mite. gram green gram hollyhock kidney bean sesame and thorn population density These results were same as the previous. apple 5 In West Bengal it was seen to cause devastating result where temperature was significantly correlated with the. damage in chilli jute cowpea Solanum Datura and Ludwigia incidence of P latus and relative humidity was positively. parviflora sesame dalhia marigold Phaseolus moongo 19 correlated with the incidence of P latus 27 and a combination. It has been reported that 60 plant families were attacked by of warm temperature high relative humidity and low light. the yellow mite P latus 4 intensity are the optimum environmental condition for profuse. The occurrence of yellow mite and its symptoms of build up of tarsonemid mite species 14 Correlation between. infestation were reported from gerbera 17 and also in other meteorological variables and incidence of yellow mite on. related plants like in Begonia 20 Dahlia and Marigold 19 24 potato was done and temperature was significantly correlated. Due to attack of P latus 100 damage was noted on sweet with the incidence of mite 25. peppers and severe damage was found on eggplants datura In the present studies bio efficacy of different acaricidal. peepers and gerbera were severely damaged under screen molecules was assessed against post embryonic stages of. house condition 22 On the cultivated species of jute yellow mite Fenazaquin provided effective control and was. Corchorus capsularis and Corchorus olitorius in Bangladesh also found eco friendly in nature being selective in action. all stages of the mites were found on young leaves of the sparing major bio control agent like Amblyseius sp 26. plants and as a result of infestation the leaves curled down Chlorfenapyr at 100 g ai ha gave greater than 80 control. colour changed to coppery to purplish and finally dried up and after 3 6 9 and 12 days 1 Among nine acaricides dicofol. fall off prematurely 15 Polyphagotarsonemus latus caused 0 074 and Wettable sulphur were the most effective. different types of physical deformities like thickening against all life stages of yellow mite and mortality increased. brittleness and shortening twisting curling and crumpling of over a period of 14 days 17 Dicofol was the most effective. young leaves Midribs of young infested leaves bent in a Zig treatment against Polyphagotarsonemus latus 23 Different. Zag fashion ventral surface become silvery petioles of molecules used to manage Polyphagotarsonemus latus. mature leaves elongated and plant became stunted with the Banks and Diafenthiuron 800 g a i ha showed the best. appearance of rosette symptoms 19 efficacy against motile stages of yellow mite 2. Table 1 Showing different chemicals Treatments and their concentration used. Treatment Chemical Name Trade Name Formulation Mode of action Doses in gm a i ha Doses used. T1 Dicofol Kelthane 18 5EC Nerve poison 277 5 1 5 ml lit. Inhibitors of oxidative,T2 Diafenthiuron Pegasus 80WP 800 1 gm lit. phosphorylation,T3 Sulfur Sulfex 80WP 1600 2 gm lit.
Acetylcholine esterase,T4 Profenophos Carina 50EC 500 1 ml lit. Inhibitors, T5 Spiromesifen Oberon 5EC Inhibitors of lipid synthesis 50 1 ml lit. Mitochondrial complex I,T6 Fenazaquin Magister 10EC 100 1 ml lit. electron transport inhibitors,Acetylcholine esterase. T7 Ethion Promite 50EC 500 1 ml lit,Inhibitors,Uncouplers of oxidative.
T8 Chlorfenapyr Inteprid 10SC phosphorylation via 100 1 ml lit. disruption of proton gradient,T9 Control,Journal of Entomology and Zoology Studies. Table 2 Relationship between mean yellow mites population with different abiotic factors in gerbera under polyhouse condition at Mounduri. BCKV West Bengal,Mean mite Maximum Minimum,Maximum Minimum Mean Mean Relative Sunshine. Date of obs population 4 sq Relative Relative, Temperature Temperature Temperature Humidity Hour hour day. cm leaf area Humidity Humidity, 24 9 2015 9 63 27 00 25 00 26 00 79 00 77 00 78 00 3 10. 28 9 15 18 93 28 00 28 00 28 00 80 00 78 00 79 00 9 30. 2 10 15 27 27 32 00 30 00 31 00 86 00 80 00 83 00 7 10. 6 10 15 36 77 34 00 32 00 33 00 87 00 85 00 86 00 7 10. 10 10 15 43 20 30 00 28 00 29 00 87 00 83 00 85 00 6 60. 14 10 15 47 83 30 00 28 00 29 00 95 00 93 00 94 00 4 40. 18 10 15 56 07 34 00 32 00 33 00 97 00 93 00 95 00 7 90. 22 10 15 64 10 33 00 31 00 32 00 95 00 91 00 93 00 9 10. 26 10 15 70 57 34 00 32 00 33 00 94 00 90 00 92 00 9 10. 30 11 15 60 43 30 00 28 00 29 00 85 00 77 00 81 00 5 70. 5 11 15 48 37 30 00 22 00 26 00 90 00 88 00 89 00 6 90. 9 11 15 35 50 29 00 25 00 27 00 89 00 77 00 83 00 6 50. 13 11 15 28 03 25 00 23 00 24 00 80 00 76 00 78 00 7 00. 17 11 15 20 70 26 00 24 00 25 00 86 00 84 00 85 00 0 30. 21 11 15 11 97 24 00 20 00 22 00 94 00 92 00 93 00 9 00. Table 3 Regression Analysis,Particular Regression Statistics.
Multiple R 0 813306,R Square 0 661466,Adjusted R Square 0 473391. Standard Error 13 93759,Observations 15, Table 4 Efficacy of different acaricide molecules against yellow mite Polyphagotarsonemus latus Banks in gerbera under Polyhouse. Journal of Entomology and Zoology Studies very promising and gave the best result for maintenance of low mite population with 99 98 mortality followed by dicofol 277 5 gm a i ha that resulted in 99 97 mite mortality diafenthiuron 800gm a i ha showed 99 96 mite mortality followed by fenazaquin 100 gm a i ha and

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