Randomly selected five plants from each plot in rectangular cage were observed population of white fly and disease intensity of leaf curl virus at weekly interval Meteorological data ., maximum temperature, minimum temperature, relative humidity, total rain fall and wind velocity were obtained from the meteorological observatory viz Chilli leaf curl disease, one of the most devastating disease in chilli, is transmit through whitefly Genn under favorable environmental conditions (Bemisia tabaci) Positively correlation of white flies population with minimum and maximum temperature. The population density of whitefly was decreased due to heavy rainfall

Chili (Capsicum annuum L.) is an economically important and widely cultivated crop of India. Chilli leaf curl virus is one of the major limiting factors in chili production, which decreases yield significantly. The experiment was carried out in one hundred fifty villages randomly selected in eastern Uttar Pradesh viz, Sultanpur and Faizabad districts during 2014 and 2015 from March to May each year. The highest leaf curl incidence was noticed in Sewra (67.39 %) followed by Hasuimukundpur (65.22%) and Etwara (64.07%) in 2014, whereas in 2015, it was found maximum in Sewra (61.44%), Hasuimukundpur (59.79%) and Isawli (57.07%). In case of block wise, the maximum incidence was found

India is one of the largest oilseed economies of the world. The contribution of oilseeds to the agricultural economy of India ranks second only to food grains. An experiment was conducted to evaluate the judicious use of fertilizers against white rust disease in mustard. Susceptible plant variety JKMS-8001 was sown in 2 m x 3 m plot size with recommended spacing in a randomized block design with three replications and nine treatments viz., T1 - (Control), T2 - (80 N+40 P2O5 kg/ha), T3 - (100 N +40 P2O5 kg/ha), T4 -(120 N+40 P2O5 kg/ha), T5 - (140 N+40 P2O5 kg/ha), T6 - (100 N+30 P2O5 kg/ha), T7 - (100 N +50 P2O5 kg/ha), T8 - (100 N+60 P2O5 kg/ha) and T9 - (100 N +70 P2O5 kg/ha). Minimum percent disease incidence (17.03) and maximum percent disease control (67.66) were observed in treatment in T9 (100 kg N +70 kg P2O5 /ha). Furthermore, maximum yield and yield attributes were found in T9 (100 kg N +70 kg P2O5 /h).

Chilli (Capsicum annuum L.) is an important spice crop grown all over the world. Chilli leaf curl, a viral disease outbreak in almost every chilli grown area causing significant yield losses. An experiment was conducted to analyze the biochemical changes in infected and healthy plant of chilli. The chlorophyll a, b and total were highest in healthy leaves then infected leaves. Moreover, severely infected leaves have lower amounts of chlorophyll contents. Out of nine cultivars total phenol and tannin contents were found maximum in Gucchedar, POL-75 and Byddagi Kaddi in comparison to highly susceptible cultivars Musa Badi, Phuley Joyti and NPKT-2.

Rice is an important cereal crop grown all over world. Blast, disease occurs in almost grown area causing significant yield losses. However, yield losses are prominent due to the improper fertilization and disease incidence in rice. Hence the study was carried out during kharif season at the Agricultural Research Farm of IFTM University, Moradabad (U.P.) with the 10 treatment combinations in randomized block design (RBD) with three replications.  The percent disease incidence (PDI) and percent disease control (PDC) of rice blast disease in aromatic rice field was significantly influenced with the application of RDF levels and Si spray. Lowest PDI (34.72%) and maximum PDC (39.4%) in aromatic rice was found in treatment T10 - (100 % RDF + two Si Spray @ 2 ml/ ltr of water at 15 and 40 DAT). Among all the treatments  observed significantly increase in all growth and yield attributes viz., plant height (158.84 cm), no. of tillers plant-1 (18.67), fresh weight (290.13 g plant-1), dry weight (103.33 g plant-1), panicle length (31.04 cm),  no. of grains panical-1 (180.78 cm), no. of unfilled grains panical-1 (16.70), no. of filled grains panical-1 (180.78), sterility percentage (10.36), 1000-seed weight (33.48 g), grain yield (67.16, q ha-1), stover yield (79.60 q ha-1), biological yield (146.77 q ha-1), harvest index (45.76 %) and B: C ratio (2.85), respectively were recorded with the application of T10 -(150% RDF + two Si spray @ 2ml / liter of water at 15 DAT & 40 DAT).