Disease Library
रोग पहचान एवं प्रबंधन
Alternaria Leaf Spot
ऑल्टरनेरिया लीफ स्पॉट
Alternaria Leaf Spot causes brown circular spots on mature leaves. Severe infections lead to yellowing and premature leaf drop, weakening trees and reducing fruit bud formation for next season.
Apple Maggot
सेब का मक्खी लार्वा
Apple Maggot adult flies lay eggs under fruit skin. Larvae tunnel through fruit flesh, creating brown tracks. Damaged fruitrots and drops prematurely.
Apple Scab
सेब का दाग
Apple Scab is the most devastating disease of apples in Himachal Pradesh. It affects leaves and fruits, causing dark spots and fruit deformation. The fungus overwinters in fallen leaves and spreads during wet, cool spring weather.
Apple Scald
सेब स्काल्ड
Apple Scald appears as brown or dark patches on fruit skin after cold storage. It develops on fruit harvested too early or stored at improper temperatures.
Bacterial Canker
बैक्टीरियल कैंकर
Bacterial Canker causes sunken, dark cankers on branches and trunks, often accompanied by gummosis. Young trees can be killed rapidly. Spread is favored by cool, wet weather.
Bitter Pit
बाटर पिट
Bitter Pit is a calcium deficiency disorder appearing as small sunken spots on fruit surface. Develops during fruit growth and often worsens in storage. Common in vigorous trees with high nitrogen.
Cedar Apple Rust
सिडार सेब रस्ट
Cedar Apple Rust requires both apple and juniper/cedar hosts to complete its life cycle. Orange-yellow spots on leaves and fruit with characteristic spore horns.
Codling Moth
कोडलिंग मोथ
Codling Moth larvae tunnel into developing fruits, leaving frass-filled holes. Multiple generations per season cause continuous damage. Most destructive pest of apples worldwide.
Collar Rot
कॉलर रोट
Collar Rot is a soil-borne disease that attacks the trunk at ground level. It girdles the tree, cutting off nutrient flow and causing rapid decline. Highly destructive in poorly drained soils.
Crown Gall
क्राउन गॉल
Crown Gall causes rough, woody galls at the crown region and on roots. These galls interfere with nutrient and water flow, weakening the tree over time.
Fire Blight
फायर ब्लिट
Fire Blight is a highly contagious bacterial disease affecting all parts of the tree. Symptoms resemble fire damage with blackened, scorched appearance. Spreads rapidly in warm, humid weather during bloom.
Frog Eye Leaf Spot
फ्रॉग आई लीफ स्पॉट
Frog Eye Leaf Spot causes characteristic purple-bordered spots on leaves resembling a frog eye. It can also cause fruit rot and dieback of branches.
Leafroller
लीफरोलर
Leafroller caterpillars roll and tie leaves together with silk, feeding inside the rolled leaves and on fruit. They can cause significant fruit damage.
Marssonina Leaf Spot
मार्सोनिना लीफ स्पॉट
Marssonina Leaf Spot causes dark brown to black spots on leaves with concentric rings. Severe infections cause complete defoliation by mid-summer, weakening trees and reducing fruit quality.
Nitrogen Deficiency
नाइट्रोजन की कमी
Nitrogen deficiency causes general yellowing (chlorosis) of leaves, starting from older leaves. It reduces shoot growth, fruit size, and overall tree vigor.
Powdery Mildew
पाउडरी मिल्ड्यू
Powdery Mildew appears as white powdery growth on leaves, shoots, and flowers. It thrives in warm, dry conditions with high humidity. Common in young orchards and nursery plants.
San Jose Scale
सैन होसे शल्क
San Jose Scale is a devastating pest that forms circular grayish scales on branches, twigs, and fruit. Heavy infestations kill branches and reduce fruit quality.
Sooty Blotch
सूटी ब्लॉच
Sooty Blotch appears as dark olive-green to black smudges on fruit surface. It is a superficial fungus that does not penetrate the fruit but reduces cosmetic quality and market value.