Seasonal incidence and management of scale insect, Melanaspis glomerata (Green), (Hemiptera: Diaspididae) in sugarcane

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dc.contributor.authorKumar, Suresh
dc.date.accessioned2021-02-16T10:08:51Z
dc.date.available2021-02-16T10:08:51Z
dc.date.issued2020
dc.description.abstractField experiment were carried out at Pusa farm, Sugarcane Research Institute, Dr. Rajendra Prasad Central Agricultural University, Pusa during 2019-20 to study on the seasoned incidence and management of scale insect Melanaspis glomerata (Green) in sugarcane variety CoP-112. The incidence of scale insect during cropping season of 2019-20 was noticed in the field during the 1st fortnight of August, 2019. The insect population reached a peak in the month of November and from December to January to the crop. The relationship between population of insect and weather parameters showed significant correlation with high maximum and minimum temperature and rainfall but showed statistically negative relation with the weather parameters. Per cent infestation, intensity and infestation index were gradually increased reaching a peak in the month of November which was highly significant than that of other months of the study. The data on damaged intensity of scale insect clearly indicated highly significant difference on qualitative and quantitative parameters under investigation except high sucrose which was found statistically significant. Perusal of the data reveals that the percentage of reduction in damage intensity levels were gradually increased when number of damaged internodes were increased except 8-damaged internodes which is even lower than those of 6 and 7 damaged internodes. This might to lesser number of effective populations of scale insect feeding on internode at this damage intensity and/or physiological change like better recoverability of damaged tissues at this growth stages. The other damage intensity levels maintained the same trend. The mean incidence percentage of scale insect was significantly lower in all the insecticides than control. Among the treatment T-4 (Setts treated with Thiomethoxan + spraying of this insecticide at pest appearance) gave superior results as noticed in incidence percentage single cane weight and yield scale of evaluation. However, remaining treatments were significantly superior over control. An effect of different integrated approaches reveals that the highest Brix, Pol percentage as well as CCS (tha-1) were recorded in plots with Treatment 4. The other treatments were also highly significant than the control. It is clearly indicated from the data of different insecticides, Thiomethoxane was proved effective for managing the scale insect. The increment as well as added benefit over control (Rs./ha) varied with respect to average yield obtained in various treatments under the present investigation which were showed considerable difference within the various insecticides. Among the treatments T4, T5 and T1 achieved higher returns of Rs./ha being 181532.00, 152112.00 and 150222.00 respectively as compared to the rest of treatments. The minimum (129212.00Rs./ha) net profit achieved with Treatment-3. The increment benefit cost ratio (IBCR) was also showed wide variation within the treatments. Among the treatments T4, gave high ratio followed by T5 and T1 being the ratio of 1:3.78, 1:3.36 and 1:3.32. The minimum (1:2.40) ratio was obtained with Treatment-3.en_US
dc.identifier.otherM/Ento/316/2018-19 of RPCAU
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810161267
dc.keywordsEntomology, Plant, Sugarcane, Management, Scale insects, Melanaspis glomerata (Green), Hemiptera: Diaspididae,en_US
dc.language.isoEnglishen_US
dc.pages45 p. ixen_US
dc.subEntomologyen_US
dc.themeSEASONAL INCIDENCE AND MANAGEMENT OF SCALE INSECT, Melanaspis glomerata (Green), (Hemiptera: Diaspididae) IN SUGARCANEen_US
dc.these.typeM.Scen_US
dc.titleSeasonal incidence and management of scale insect, Melanaspis glomerata (Green), (Hemiptera: Diaspididae) in sugarcaneen_US
dc.typeThesisen_US
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