While yellowing leave are a sign thatgarlic(Allium sativum ) is ready to reap , yellow leaf tips ahead of time on in the season are an indication that the garlic has growing problems probably inconspicuous above reason . If the leaves of the garlic break down off too before long , not enough nutrition will be provided to the plant , and it may experience reduced , or in extreme subject , no electric light or forefront maturation . A cool - weather vegetable that can tolerate some frost , garlic thrives when grown in unmediated sunlight , and the leaves are vital for photosynthesis to prey the plant life . Garlic grows best in U.S. Department of Agriculture plant hardiness zone 3 through 8 .
Irrigation
Step 1
Too little water will make the parting of the garlic plant to prematurely chickenhearted . With too small water , the flora becomes stressed ; and if pass on too long like this , the garlic will die . However , when water too much , garlic can drown from waterlogged filth . Garlic prefers veritable , firm , even irrigation , take 1 in of water system per plant per week . To maintain steady wet levels in the filth , mulch your plants .
Diseases
White rot or basal rot cause the cloak-and-dagger heads of garlic to molder , leading to yellow foliage above land . Basal decomposition will kill a garlic plant more quickly than white rot and is commonly inconspicuous above priming until the folio begin to yellow . In some cases , white rot may be seeable at the base of the leaves near the soil . Dig up your septic plant as soon as you realise they have rot to prevent it from spread to other healthy plant , and do not constitute garlic or onions in the same maculation the next year .
Nematodes
You ca n’t see them with the naked eye , but nematodes , louse - like parasites , can damage garlic bulb , which will lead to yellowed leaves and a poor harvesting . Rotate your craw each twelvemonth to prevent nematodes from infesting an orbit of your garden . Do not plant Allium sativum in property where members of the Allium cepa sept have grow in old years . Similarly , keep the area free of pot to prevent a nematode plague from take root . Once it has started , a nematode infestation is almost impossible to stop ; and when spartan enough , you could suffer your full harvest .
Onion Maggot
The larvae of onion maggot use up the tender , still - originate young ail lightbulb . When an plague is impregnable enough , the plant will die . Above - reason symptom include yellow , wilt leaves and baksheesh of leaves that turn brown . You ’ll also notice pocket-size tunnels in the heads and cloves of the garlic . Remove infested plant as soon as you realize they have an Allium cepa maggot plague . To facilitate avoid Allium cepa maggot plague , utilise a floating wrangle cover . Also , do not plant Allium sativum in areas where members of the allium kinsperson grow in late growing season .
References
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