Pest Information

Information on different agricultural pests can be accessed here. Pests that affect specific crops can be accessed through both the Pests by Crop page or through pages on specific pest types (insects, diseases, weeds and wildlife).

 

Pests by Crop

Apple Fruit

Apple

Apple is an important cash crop since commencing in Bhutan in the ...
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Chilli

Chilli cultivation (8,320 MT produced in 2013) is of major importance to ...
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Citrus

Citrus, mainly mandarin, is almost exclusively grown as a cash crop. It ...
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Cole crops

Cole crops are an important cash crop in Bhutan. It is grown ...
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Maize

Maize is a primary food crop in Bhutan after rice, and it ...
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Potato

Potatoes are one of the most important cash crops in Bhutan, for ...
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Rice

Rice is the most important cereal crop for Bhutan. It supplies 53% ...
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Stored grain

Grains (mainly rice and maize) are mostly grown for self consumption and ...
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Diseases

Apple scab

Venturia inaequalis Crop: Apple Why is it a problem? The major economic ...
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Chilli blight

Phytophthora capsici Crop: Chilli Why is it a problem? Chilli blight is ...
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Clubroot

Plasmodiophora brassicae Crops: Cole crops Why is it a problem? Clubroot is ...
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Early blight

Alternaria solani Crop: Potato. It has also been reported on tomato Why ...
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Gray leaf spot (GLS)

Cercospora zeae-maydis Crop: Maize Why is it a problem? First detected in ...
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Huanglongbing (HLB)

Candidatus Liberibacter asiaticus Crop: Citrus Why is it problem? Huanglongbing (HLB), is ...
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Late blight

Phytophthora infestans Crops:Potato and Tomato Why is it a problem? Late blight ...
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Lichens on apple

Crop: Apple Why is it a problem? Tree lichens are common in ...
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Potato viruses

Potato Leaf Roll Virus (PLRV) and Mosaic Viruses (PVX and PVY) Crop: ...
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Powdery mildew

Oidium citri Crop: Citrus Why is it a problem? This fungus is ...
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Premature leaf fall (PLF)

Alternaria mali or Gloeodes pomigena Crop: Apple Why is it a problem? ...
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Rice blast

Pyricularia oryzae   Crop: Rice Why is it a problem? Severe epidemics of ...
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Rice sheath blight

Thanatephorus cucumeris (or Rhizoctonia solani)   Crop: Rice Why is it a problem? ...
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Turcicum leaf blight (TLB)

Exserohilum turcicum Crop: Maize Why is it a problem? This was the ...
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Insects

Apple fruit beetles

Popillia species and Protaetia neglecta Crop: Apple Why is it a problem? ...
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Apple fruit borer

Argyresthia sp. Crop: Apple Why is it a problem? Caterpillars burrow into ...
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Apple twig borer

Linda rubescens Crop: Apple Why is it a problem? Larvae bore into ...
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Armyworm

Pseudaletia separata (or Mythimna separata)        Crops: Rice, maize, wheat and buckwheat Why ...
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Asiatic citrus psyllid

Diaphorina citri Crop: Citrus Why is it a problem? The Asiatic citrus ...
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Cabbage aphid

Brevicoryne brassicae Crops: Cole crops, also mustard and radish Why is it ...
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Cabbage moth

Mamestra brassicae Crops: Cole crops Why is it a problem? Cabbage moth ...
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Cabbage white butterfly

Pieris brassicae Crops: Cole crops Why is it a problem? Cabbage white ...
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Chilli pod-borer

Helicoverpa armigera Crop: Chilli, chickpeas, maize and tomato Why is it a ...
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Chinese fruit fly

Bactrocera minax Crop: Citrus Why is it a problem? Chinese fruit fly ...
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Citrus leaf miner

Phyllocnistis citrella Crop: Citrus Why is it a problem? The citrus leaf-miner ...
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Citrus shield bug

Rhynchocoris poseidon Crop: Citrus Why is it a problem? Feeding on sap ...
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Citrus trunk borer

Anoplophora nr versteegi Crop: Citrus Why is it a problem? Stem-boring larvae ...
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Cleorina leaf beetles

Cleorina spp. Crops: Apples, walnut Why is it a problem? Cleorina leaf ...
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Common cutworm

Agrotis segetum Crop: Chilli, Cole crops, tomato, maize Why is it a ...
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Diamondback moth

Plutella xylostella Crop: Cole crops Why is it a problem? Diamondback moth ...
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Flat spiny caterpillar

Agalope hyalina Crop: Apple Why is it a problem? Large numbers of ...
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Fruit tree red spotted mite

Panonychus ulmi Crop: Apple Why is it a problem? Prolonged, intense infestations ...
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Grain moth

Sitotroga cerealella Crop: Stored grain, especially maize Why is it a problem? ...
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Grain weevils

Sitophilus species Crop: Stored grain, especially maize Why is it a problem? ...
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Green apple weevil

Myllocerus sp. nr chloris Crops: Apple, peach Why is it a problem? ...
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Green citrus psyllid

Cacopsylla heterogena Crop: Citrus Why is it a problem? The green citrus ...
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Harlequin bug

Eurydema spp. Crops: Cole crops Why is it a problem? Harlequin bugs ...
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Hoppers on rice

Several species of Cicadellid and Delphacid bugs Crop: Rice Why is it ...
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Peach-potato aphid

Myzus persicae Crop: Generalist, but is only a pest of potato Why ...
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Potato tuber moth (PTM)

Phthorimaea operculella Crop: Potato Why is it a problem? PTM is the ...
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Red ant

Dorylus orientalis Crop: Generalist, but can seriously impact vegetable crops including potato ...
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Rice caseworm

Parapoynx stagnalis Crop: Rice Why is it a problem? This leaf-feeding moth ...
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Rice leaf folder

Cnaphalocrocis medinalis Crop: Rice Why is it a problem? The rice leaf ...
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Rice stem-borers

Four moth species Crop: Rice Why is it a problem? There are ...
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San Jose scale

Diaspidiotus perniciosus Crop: Apple Why is it a problem? When feeding on ...
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Tomato leaf miner

Tuta absoluta Crop: Tomato Why is it a threat? Although not yet ...
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Two-spotted apple beetle

Microserica sp. Crop: Apple Why is it a problem? Large beetle numbers ...
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White grub

Phyllophyga sp. Crop: Potato Why is it a problem? Feeding by the ...
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Woolly aphid

Eriosoma lanigerum Crop: Apple Why is it a problem? The woolly aphid ...
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Weeds

Loranthus

Parasitic plant: Scurrula parasitica Crop: Citrus Why is it a problem? This ...
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Shochum

Potamogeton distinctus Crop: Rice   Why is it a problem? Potamogeton distinctus, ...
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Weeds in maize

Why is it a problem? Maize is the second most important cereal ...
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Weeds in paddy

Why is it a problem? Rice is the staple diet of the ...
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Weeds in potato

Why is it a problem? Potato is one of the main cash ...
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Vertebrate Pests

Wild boars

Sus scrofa Crops: All crops, but especially maize, rice and potato Why ...
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