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Asparagus diseases A lecture on ToT training of FFS By Mr Allah Dad Khan Provincial Coordinator IPM KPK MINFAL Islamabad
The document is a lecture on asparagus diseases covering various fungal infections such as Fusarium wilt, Phytophthora crown and spear rot, and asparagus rust. It describes symptoms, causes, and management strategies for each disease, emphasizing the importance of using disease-free seeds, good irrigation practices, and soil health. Recommended actions include planting resistant varieties, avoiding overwatering, and maintaining good crop hygiene.
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Asparagus diseases A lecture on ToT training of FFS By Mr Allah Dad Khan Provincial Coordinator IPM KPK MINFAL Islamabad
- 2. Asparagus diseases A Lecture ToToT trainees ( FFS) By Mr. Allah Dad Khan Provincial Coordinator IPM KPK MINFAL Pakistan
- 4. Fusarium wilt Fusarium oxysporum Symptoms • •Weak, spindly spears; red/brown discoloration • Cause • Fungus • Comments • Very little can be done to prevent spread once fungus is introduced; plant resistant varieties and use clean seed • Management • Plant only disease free seed; minimize stress to plants by following good fertilization and watering practices; plant tolerant varieties; stop harvest when productivity falls below 70%
- 5. Phytophthora crown andspear rot Phytophthora spp. • Soft, watery lesions on stem near soil; brown lesions • Cause • Oomycete • Comments • Wet growing season promotes Phytophthora infection; plant in well-draining soil • Management • Plant disease free transplants in Phytophthora free soil; avoid over-watering plants; may be necessary to treat soil with fungicide • Symptoms
- 6. Asparagus rust Puccinia asparagi •Symptoms • Orange pustules on spears and ferns; yellowing ferns and dieback • Cause • Fungus • Comments • Prevalent in areas of high humidity; refrain from over and under watering • Management • Manage irrigation and ensure plants are not under or over- watered; cut and destroy diseased ferns; dust plants in sulphur
- 7. Fern spot (Stemphyliumsp.) • produces small purple spots on the stems, which enlarge to light-brown lesions with purple margins. Sections of the stem may die. Good crop hygiene and the application of a registered fungicide will help manage fern spot. • Symptoms
- 8. Fusarium crown androot rot • produces a reddish-brown discolouration of the internal tissues at the base of the stems and within the crown, eventually causing breakdown and death. Planting on well- drained soils is the best way to reduce problems caused by this disease.