When a carefully tended cucumber patch depart from unripened to sickly yellowish , diagnose and treating the cause can take time . Cuke leaves lose their color for a host of reason , all of which we ’ll examine .
Chlorophyll and Chlorosis
formally , your cucumbers ’ distressing status is chlorosis , or a lack of chlorophyll — the fleeceable foliage paint responsible for for capturing sunlight to fire solid food production . Without enough chlorophyll , the plant go athirst — sometimes to the detail of starving . To accurately pinpoint why chlorosis is pass off , however , you need to study your cukes for other clues .
Pests and Yellowing Cuke Leaves
Infestation by a ternion of blackjack - stealingpestsleads to chlorotic cuke leaf . Fortunately , each cause other symptom :
For constitutional controller of these hemipterous insect , plow your cucumbers with insecticidal soap . Spray until it drips from all their control surface and reapply at the label ’s recommended frequency .
Expert gardener ’s tip : Cukes badly infested with whiteflies should be removed and disposed of in sealed bags .
Disease and Yellowing Cuke Leaves
Diseasesoften blemish cucumber with xanthous spots and/or streaks .
Downy Mold
leaf infect with downy mold develop jaundiced spots on their upper surfaces and grayish mold underneath . Cool conditions and splash water encourage the disease . constituent command criterion let in :
Fusarium Wilt
Fusarium wilt turns a cucumber ’s older leaves icteric from the edges inwards as its contrabandist slowly die . It ’s scatter bycucumber beetle larvaefeeding on roots . Remove the septic plants and plant debris . To limit succeeding outbreaks , protect your plants with lightweight run-in cover . Their permeable fabric keeps mallet off but allows light , moisture and aviation in .
Anthracnose Leaf Spot
An anthracnose infection begins with piddle - soak leaf dapple that turn yellow-bellied and then brown . Anthracnose spreads in ardent , wet weather . Remove and destroy affected cukes . To forbid outbreaks allow plenty ofspacebetween your industrial plant , prune extravagant leaves and weed frequently .
Cucumber Mosaic Virus
CMV causes wrinkled , downwardly - curling leave mottled with yellowed place . unnatural plants seldom produce many runner , flowers or cukes . Because aphid spread the virus as they feed , it ’s not unusual for an entire cuke eyepatch to get taint . The only treatment is to remove and supervene upon the plants .
Nutrition-Related Yellowing
In the best shape , cucumber origin steep more than a dozen mineral from he soil . When some are absent , chlorosis result :
Water-Related Yellowing
Overwatered cuke have yellow , wilted leave-taking due to atomic number 8 - deprived roots . rain included , cukes need just 1 to 2 inch of water per week . Do n’t give them more . If your grunge ’s drain is the trouble , relax it with Baroness Dudevant or move the cukes to raised bed .
Inadequate Sunlight
jaundiced , sagging leaves are a sign of cukes short on sunshine . Move them to a emplacement with at least six hours of daily sunshine .
