Orchard Biosecurity Manual for the Mango Industry - Farm Biosecurity

More documents

Recommendations

Info

Fact sheet Blue-striped nettle grub What is Blue-striped nettle grub? The Blue-striped nettle grub (Parasa lepida) is a damaging pest with a wide host range, including banana, cocoa, castor, citrus, coconut, palms, peas, pineapple, mango, rice, and rose. What does it look like? The grubs have thick, fleshy green bodies with three pale blue longitudinal stripes. When mature, they are about 3-4 cm long. The cocoons look like large seeds. They are spherical, about 5-15 mm in diameter, and consist of a hard papery shell covered with a thin layer of silk. Cocoons are found buried in the soil (within the top 2 cm) or among dead leaves. The overall colour pattern of the adults (moths) is similar in both sexes. The head and thorax are yellowish-green. The abdomen is reddish-brown, and the legs are dark red-brown with well-developed tufts of bristles. A brownish fringe surrounds the outer edge of the wing. What can it be confused with? Leaf damage and defoliation of trees can be caused by other insect pests. Positive identification requires detecting the moths or grubs themselves. What should I look for? The grubs are conspicuous, recognised by three blue longitudinal stripes on the body. Symptoms of their presence in trees include holes chewed in leaves and later, defoliation of the whole tree. The first outbreaks of the Blue-striped nettle grub are usually localised, with only a few trees defoliated. An early instar larva The head and thorax of adult moths are yellowish-green Grubs are 3-4 cm long when mature Dr V. Shubhalaxmi Masaki Ikeda DEEDI
How does it spread? Blue-striped nettle grub may be dispersed through plant material contaminated with eggs or larvae. Where is it now? The Blue-striped nettle grub is found in Papua New Guinea, Indonesia (Sumatra, Java, Bali), the Philippines, Malaysia, Thailand, Vietnam, Laos, China, Japan, Pakistan, Bangladesh, India, Nepal, Sri Lanka and Africa. How can I protect my orchard from Blue-striped nettle grub? Source plant material only from clean, accredited suppliers, and preferably material that is certified. Check your orchard frequently for the presence of new pests and unusual symptoms. Make sure you are familiar with common mango pests so you can tell if you see something different. If you see anything unusual, call the Exotic Plant Pest Hotline EXOTIC PLANT PEST HOTLINE 1800 084 881 Adult moth For more information visit www.planthealthaustralia.com.au Show Ryu, Wikimedia Commons
Page 1 and 2: Orchard Biosecurity Manual for the
Page 3 and 4: Table of contents Six easy ways to
Page 6 and 7: 4 DEEDI Biosecurity overview This m
Page 8 and 9: 6 Pests High priority exotic pest t
Page 10 and 11: 8 Pest surveillance Orchard monitor
Page 12 and 13: 10 The Emergency Plant Pest Respons
Page 14 and 15: 12 Product management Planting and
Page 16 and 17: 14 People and biosecurity Biosecuri
Page 18 and 19: 16 Equipment and vehicles Movement
Page 20 and 21: 18 Biosecurity best practice checkl
Page 22: 20 Further information More informa
Page 25 and 26: Pest surveillance data sheet Orchar
Page 27 and 28: Stored products Products stored Pro
Page 29 and 30: can occur inside the flesh before o
Page 31 and 32: What should I look for? Eggs are la
Page 33 and 34: How does it spread? Mango malformat
Page 35 and 36: Where is it now? Mango leaf-gall mi
Page 37: Damaged fruit may be attacked secon
Page 41 and 42: Where is it now? India, Indonesia a
Page 43 and 44: How does it spread? The lifecycle o

Orchard Biosecurity Manual for the Mango Industry - Farm Biosecurity

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?