mango disease - KrishiSewa

04 May Mango malformation : A serious problem in mango growing

Posted at 04:53h in Crop disease

Raj Bala Choudhary¹* and Virendra kumar² 22 views

आम का गुच्छा-मुच्छा रोग: आम उत्पादन में एक गम्भीर समस्या The disorder was first reported by Maries (Watt, 1891) in Darbhanga, Bihar (India). In the last three decades or so it has assumed an alarming situation in the Northern India where it is threatening for the mango growers because all the commercial cultivars are highly susceptible to malformation. It widely occurs in Punjab, Delhi, Uttar Pradesh and less prevailing in Gujarat and Maharashtra. However, it is negligible in West Bengal and Bihar. The southern mango growing regions like Tamil Nadu, Andhra Pradesh, Karnataka and Kerala almost free from this disorder. Symptoms of malformation: The incidence of malformation varies from year to year, cultivar to cultivar and also with age of the trees. Generally it is occur in two forms; vegetative and floral malformation. i. The vegetative malformation is observed at seedling stage in nursery. On, seedling over three month old, swelling appears in the axil of leaves. The affected plant shows bunching of terminal portion of leaf, shortening of the size of leaf lamina, shortening of internodal length and reduced length of petiole. ii. Flora malformation directly affects the tree productivity. In the case of bearing trees the panicles are affected. The peduncles become thick and fleshy with profuse branching. The floral branches are crowded and enlarged...

26 Dec आम का गुच्छा/गुम्मा रोग एवं उपचार

Posted at 06:51h in Crop disease

डॉ टी.ए.उस्मानी, डॉ प्रदीप कुमार एवं राजीव कुमार 29 views

Mango Malformation disease and its treatment आम का गुच्‍छाा या गुम्‍मा , आम के वृक्षों पर होने वाला एक रोग है | प्रायः इस रोग के कारकों में फुजेरियम सबग्लुट्टीनेन्स नामक फफूंद का उल्लेख होता है | किन्तु अनेक विशेषज्ञों का मत है कि इस रोग का कारण पौधे में होने वाले हार्मोनों का असंतुलन हैं | एक अन्य मतानुसार इस रोग का कारण कुछ पोषक तत्वों की कमी भी हो सकती है | गुम्मा रोग से ग्रसित आम के पेड़ में पत्तियों एवं फूलों में असामान्य वृद्धि एवं फल विकास अवरुद्ध हो जाता है | इस रोग के कारण आम के उत्‍पादन मे असाधारण कमी होती है। ऐसा पाया गया है कि आम की भारतीय प्रजातियाँ इस रोग से अधिक ग्रसित होती हैं | आम का गुच्‍छा रोग के लक्षण : नई पत्तियों एवं फूलों की असामान्य वृद्धि, टहनियों पर एक ही स्थान पर अनगिनत छोटी – छोटी पत्तियां निकल आना, बौर के फूलों का असामान्य आकार होना, फूल का गिर जाना, फल निर्माण अवरुद्ध हो जाना, आदि इस रोग के प्रमुख लक्षण है।| गुम्‍मा रोग दो प्रकार का होता है 1. आम के पत्तियों का गुम्मा (Leaf malformation) : आम की टहनी पर एक पट्टी के स्थान पर अनगिनत छोटी- छोटी पत्तियों का गुच्छा बन जाना, तने की गाठों के बीच का अंतराल अत्यधिक...

08 May आम के 5 प्रमुख रोग व उनका प्रबंधन

Posted at 09:13h in Crop disease

विजय श्री गहलोत 14 views

5 Major diseases of mango and their management आम भारत का प्रमुख फल है जिसे फलों के राजा की उपाधि भी दी गई है। इसके स्वाद, उम्दा सुगंधि के साथ यह फल वि‍टामि‍न ए तथा सी का एक प्रचुर स्रोत है। आम का पाैैैधा प्रकृति‍ि‍ में दढृ होता है अतः कम कीमत व कम मेहनत में इसका रखरखाव कि‍या जा सकता है। भारत में कुल फल उत्पादन क्षेत्र 1.2 मि‍लयन हेक्टेयर में आम का उत्पादन क्षेत्र लगभग 22% है तथा उत्पादन 11 मि‍लयन टन है। उत्तर प्रदेश, आंध्र प्रदेश सवााधिक आम उत्पादक क्षेत्र हैं इसका उपयोग अपरि‍ि‍पक्व तथा परि‍पक्व दोनों अवस्थाओं में कि‍या जाता है। कच्चे अपरि‍पक्व फलों का उपयोग चटनी, अचार व जूस बनाने में कि‍या जाता है । पके हुए फलों का उपयोग खाने में तथा अन्य उत्पाद जैसे की जैम, जैली, स्क्वैश, मर्मलैड , नेक्टर बनाने में होता हैआम के वि‍भि‍न्न वृद्धि अवस्थाओं में कई प्रकार के रोगों का आक्रमण होता है जिनमें से कुछ प्रमुख रोग व उनका प्रबंधन नि‍म्‍न प्रकार है- 1. सफेद रतुआ (पाउडरी मि‍ल्डयू) - यह रोग फफूंद द्वारा होता है इस रोग में पत्ति‍यों डंठलों फलों व फूलों पर सफेद रंग का पाउडर जैसा चूण जमा हो जाता है। रोग ग्रसि‍त फल व फूल शीघ्र ही गि‍र जाते हैं गंभीर परि‍स्थति‍यों में फल भी नहीं लगते । नई पत्ति‍यों...

11 Jan Diseases of mango blossoms and their management

Posted at 09:02h in Crop disease

Sangeetha 19 views

आम के बौर (फूल) के रोग और उनका प्रबंधन Mango production is seriously hampered by many diseases particularly in recent days. About 140 disease-causing pathogens are known to inflict damage to mango crop at various stages of its production. Among them, diseases on inflorescences or blossoms, if unchecked, take heavy toll on yield of mango. Powdery mildew and blossom blight or anthracnose are the most notorious diseases infecting mango in India at the time of flowering and fruit set. Powdery mildew of Mango blossoms Powdery mildew affecting mango inflorescence is characterised by greyish white or whitish colour talc like haze and it may cover the inflorescence partially or entirely, leading to reduced fruit set or complete failure of the crop. It affects the young developing fruits also. This disease is caused by a fungus named as Pseudoidium anacardii. In different developmental stages of panicle/ inflorescence, no infection occurs up to protected stage (elongated inflorescence still protected by bracts), even when the disease level reached the peak on other inflorescence in the field. When the axes of the inflorescence changes from green colour to red colour, the inflorescence become slowly susceptible to powdery mildew i.e., from the protected stage susceptibility increases and the full bloom stage is the most susceptible stage. Powdery mildew symptoms were diagnosed in...

22 Apr 6 major diseases of Mango crop and their management

Posted at 09:49h in Crop disease

Shantamma 22 views

आम की फसल के 6 प्रमुख रोग व उनका प्रबंधन। Mango (Mangifera indica) is the national fruit of India, where it is known as the 'King of Fruits'. Not only is it one of the most highly prized fruits of South Asia, it is also intimately connected with folklore and legends across many religions. The mango is believed to have been discovered as long as five to six thousand years in eastern India,Thailand, Myanmar, the Andaman Islands or Malaysia. No matter its colouring or variety, a ripe, medium size mango provides carbohydrates, fiber, vitamins A, B1, B6 and C, sodium, calcium, magnesium, zinc, copper, manganese, iron, phosphorus, potassium, pantothenic acid, and niacin. 1. Anthracnose in Mango crop: Colletotrichum gloeosporioides Symptoms: Produces leaf spots, blossom blight, wither tip, twigs blight and fruit rot. Small blister like spots develop on the leaves and twigs. Young leaves wither and dry. Tender twigs wither and die back symptom appears. Necrotised tissue drop out leads to shot hole symptom Affected branches ultimately dry up. Black spots appear on fruits. The fruit pulp becomes hard, crack and decay at ripening. Infected fruits drop Symptoms on fruits Symptoms on leaves Management Spray P. fluorescens (FP 7) at 3 weeks interval commencing from October at 5g/like on flower branches. 5-7 sprays are to be given on flowers and bunches. Before storage, treat...

24 Jun Some Important Disease of Mango

Posted at 10:51h in Crop disease

21 views

आम के कुछ महत्वपूर्ण रोग 1. Powdery mildew in Mango: Oidium mangiferae (Perfect stage: Eyrsiphe polygoni) Symptoms The disease is easily recognized by whitish or grayish powdery growth on the inflorescence and tender leaves. Generally the infection starts from the inflorescence and spreads downwards covering the floral axis, tender leaves and stem. Infected leaves become twisted, curled and fall. Infected floral parts are severely damaged and drop off. If the fruits are set, they do not grow in size and may drop before attaining pea size. Fruits are sometimes malformed, discolored due to severe mildew attack. Because of poor fruits set and heavy flower and fruits drop, the loss due to the disease may be as high as 70-80%. Management Two preventive sprays with wettable sulphur 0.3% before flowers open and after fruit set. Dusting twice or thrice with fine Sulphur. Spraying with Karathane 0.1% before flowering and after fruit set (peanut stage). Resistant varieties: Neelum, Zardalu, Banglora, Torapari-khurd and Janardhan pasand. 2) Anthracnose in Mango: Colletotrichum gloeosporioides Symptoms The fungus produces leaf spots, blossom blight, wither tip, twigs blight and fruit rot On leaves circular, light yellow brown spots are produced initially which soon enlarge with dark brown to black margins. If infection is severe individual spots coalesce leading to twisting of foliage and premature defoliation The disease spreads rapidly during rainy season and covers the...