~ 2683 ~ International Journal of Chemical Studies 2018; 6(6): 2683-2686 P-ISSN: 2349–8528 E-ISSN: 2321–4902 IJCS 2018; 6(6): 2683-2686 © 2018 IJCS Received: 09-09-2018 Accepted: 13-10-2018 Nitesh Kumar Sharma Student M.Sc.(Ag.)Department of Hort, Narendra Deva University of agriculture & technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Sanjay Pathak Professor, Department of Hort, Narendra Deva University of agriculture & technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Ravi Pratap Singh Student M.Sc (Ag.) Department of Hort., Narendra Deva University of agriculture & technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Anshuman Singh Student M.Sc. (Ag.)Department of Hort. Narendra Deva University of agriculture & technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Mritunjay Rai Student M.Sc. Vegetable Science, Department of Hort. B.U.A.T, Banda, Uttar Pradesh, India AP Singh Assistant Professor, Department of Hort. Narendra Deva University of Agriculture &Technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Anand Singh Student M.Sc., Department of G.P.B. Narendra Deva University of Agriculture &Technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Correspondence Nitesh Kumar Sharma Student M.Sc. Department of Hort, Narendra Deva University of agriculture & technology, Narendra Nagar, Kumarganj Faizabad, Uttar Pradesh, India Estimates of chemicals & bagging along with physical traits of rainy season guava ( Psidium guajava Linn.) Cv. Lucknow-49 Nitesh Kumar Sharma, Sanjay Pathak, Ravi Pratap Singh, Anshuman Singh, Mritunjay Rai, AP Singh and Anand Singh Abstract The study was started from June 2017 to assess the “Estimates of chemicals & bagging along with physical traits of rainy season guava (Psidium guajava Linn.) CV. Lucknow-49” at the Main Experiment Station and Post Harvest Technology Laboratory of Horticulture, Narendra Deva University of Agriculture and Technology, Faizabad (U.P.). The fruits of rainy season or Ambe bahar guava crop are very poor in quality, having poor shelf life and numbers of fruits are infested with insect pests and diseases particularly fruit flies and anthracnose respectively. These problems occur due to prevalence of warm and humid condition in rainy season. To overcome these problems, the present investigation was formulated with nine pre-harvest treatments viz. T1 (CaCl2 @ 2%), T2 (salicylic acid @ 3%), T3 (polythene + CaCl2 @ 2%), T4 (polythene + salicylic acid @ 3%), T5 (blue polythene + CaCl2 @ 2%), T6 (blue polythene + salicylic acid @ 3%), T7 (violet polythene + CaCl2 @ 2%), T8 (violet polythene + salicylic acid @ 3%)and T9 (Control). The treated fruits were harvested at ripe stage and stored at ambient condition. Keywords: polythene, anthracnose, salicyclic acid, ambient 1. Introduction Guava belongs (Psidium guajava Linn.) to the family Myrtaceae and genus Psidium. It is originated from Tropical America (Peru). It has been cultivated in India since early 17 th century. Which has a tropical fruit but also grows well in sub- tropical conditions. Guava has been popularly known as “apple of tropics” it is most common and major fruit of India and considered the fifth most important fruit in area and production after mango, citrus, banana, and apple. India is one of the highest guava producing countries in the world with a production of 39.16 lakhtonnes from area 2.61 lakh ha and productivity of 13.7 MT/ha (NHB Database, 2016-17and Maharashtra leads in total area under guava whereas, Uttar Pradesh is in 3 rd position. District Allahabad has the reputation of growing the best guava in the country as well as in the world. The important guava producing countries are India, Mexico, Brazil, Cuba, Venezuela, Australia, South Africa, Thailand, Malaysia, Indonesia, China, Sri Lanka, Philippines, Bangladesh, Myanmar, Dominican Republic, USA (Hawaii, Florida and California) and Haiti. It is one of the important fruits of India and it is considered to be the poor man’s apple. It has adopted in India so well that it appears to be an Indian fruit. Guava is considered as one of the exquisite, nutritionally valuable and remunerative crops. Guava fruits are used for both, fresh consumption and processing. Guava is one of the richest natural sources of vitamin-C containing 2 to 5 times more vitamin-C than oranges and 10 times more than tomatoes. Compared to other fruits, the whole guava is a moderately good source of calcium, a fair source of phosphorous and good source of iron. A lot of varieties are known to exist in India. The most well known varieties are Allahabad Safeda, Lucknow-49 (Sardar guava), Pear Shaped, Behat Coconut, Apple Colour, Red Fleshed, Pant Prabhat, Arka Amulya, Arka Mridula, Lalit, and Shweta, Lucknow-49 (Sardar Guava) is one of the most important cultivars of guava, a seedling selection of Safedais a Semi-dwarf tree, vigorous, heavy branching type with flat crown, large elliptic-ovate to oblong shaped leaves and large roundish ovate shaped fruits with primrose-yellow skin colour,