Fruit Tree Problems: Multiple Choice Questions on Cocoa Diseases

 Previous post during last year was on Fruit Tree Problems: MCQs on Arecanut Diseases. This year I am continuing with other set of questions. You may answer these in comment section

Q 1 Phytophthora palmivora causes _____________________ disease of cocoa

a. Seedling die back	c. Black pod disease
b. Stem canker	d. All the above

Q 2 White thread blight is caused by

a. Marasmius scandens	c. Botryodiplodia theobromae
b. Colletotrichum gloeosporioides	d. Oncobasidium theobromae

Q 3 White thread blight spread through

a. Contact of branches	c. Contact of plant to plant
b. Contact of mycelium	d. Dead leaves carried by wind

Q 4 Characteristic symptom(s) of Black pod diseases of cocoa

a. Appearance of brown spots on pods	c. Both a and b
b. Discoloration of brown spots & infected beans	d. None of these

Q 5 Favourable conditions for black pod

a. High density plants accompanied with shady location with cool temp.	c. HDP with RH upto 90% and Temp 30-35oC
b. High density plants in rainy weather with high temperature	d. HDP with RH >95% and Temp 30-35oC

Q 6 Charcoal pod rot of cocoa is caused by

a. Marasmius scandens	c. Botryodiplodia theobromae
b. Colletotrichum gloeosporioides	d. Oncobasidium theobromae

Q 7 Asexual fruiting body produced by Botryidiplodia theobromae

a. Acervulus	c. Pseudothecium
b. Pycnidia	d. Apothecium

Q 8 Causal organism of cocoa swollen shoot is

a. Phytoplasma	c. Bacteria
b. Virus	d. Fungus

Q 9 Characteristic symptom of cherelle rot is

a. Shrunken infected stalk with mummified fruit	c. Both a. and b.
b. Brown discolored beans under high humid conditions	d. None of these

Q 10 Vascular streak dieback of cocoa has been reported only from

a. Tamil Nadu	c. Karnataka
b. Kerala	d. Telangana

 

Fruit Tree Problems: Multiple Choice Questions on Arecanut Diseases

In my previous post I posted MCQs on Fruit tree Problem: pomegranate diseases. Today I am going to post MCQs on areacanut diseases. You can answer in the comment section.

Q 1 Mahali/Koleroga disease of arecanut was first reported by

a. Butler in 1904 from Mysore	c. Coleman in 1905 from Mysore
b. Butler in 1906 from Mysore	d. Coleman in 1910from Mysore

Q 2 Mahali disease is caused by

a. Phytophthora meadii	c. both of these
b. Phytophthora arecae	d. None of these

Q 3 Following factor play an important role in spread of mahali disease of arecanut

a. Low temperature & high humidity	c. both of these
b. Close plantation	d. None of these

Q 4 Mahali/koleroga disease of arecanut can be successfully managed by prophylactic sprays of

a. Bordeaux mixture(1%) and Metalaxyl MZ(0.2%)	c. Bordeaux mixture(1%) and Hexaconazole(0.2%)
b. Bordeaux mixture(1%) and Carbendazim (0.1%)	d. All of these

Q 5 Bacterial leaf stripe of arecanut is caused by

a. Xanthomonas campestris pv. arecae	c. Pseudomonas campestris pv. campestris
b. Pseudomonas campestris pv. arecae	d. Xanthomonas campestris pv. campestris

Q 6 Favourable temperature for bacterial leaf stripe development in arecanut is

a. 26-30oC	c. 26-28oC
b. 25-28oC	d. 25-30oC

Q 7 Bacterial leaf stripe of arecanut can develop faster under

a. 85-90% RH	c. 80-85% RH
b. 60-75% RH	d. 70-85% RH

Q 8 Anabe roga of arecanut is caused by

a. Ganoderma lucidum	c. Ganoderma applanatum
b. Ganoderma australe	d. Ganoderma lingzhi

Q 9 Bud rot of arecanut is caused by

a. Phytophthora palmivora	c. Phytophthora cactorum
b. Phytophthora parasitica	d. Phytophthora nicotianae

Q 10 Yellow leaf spot disease of arecanut is caused by

a. Curvularia sp.	c. Colletotrichum sp.
b. Phyllosticta sp.	d. all of these.

Fruit Tree Problems: Multiple choice questions on Pomegranate Diseases

Last week I posted questions on Pineapple diseases. Today I am posting questions on  pomegranate diseases. These will help you to understand the crop better. You may answer these questions in comment box.

Q 1 Bacterial blight of pomegranate is caused by

a. Xanthomonas campestris pv punicae	c. Xanthomonas axonopodis pv punicae
b. Pseudomonas axonopodis pv punicae	d. Pseudomonas campestris pv punicae

Q 2 Light brown zonated spots appear on leaves and fruits of pomegranate are caused by

a. Cercospora punicae	c. Coelophoma empetri
b. Alternaria altarnata	d. Phytophthora nicotianae

Q 3 Primary source of inoculum for Cercospora leaf spot are

a. conidia in acervulus	c. dormant mycelia in infected plant part
b. dormant mycelia in plant debris	d. None of these

Q 4 Wilt of pomegranate is caused by

a. Fusarium oxysporum	c. Fusarium fusariodes
b. Verticilium albo-atrum	d. All of these

Q 5 Flower and fruit spot of pomegranate is caused by

a. Phytophthora palmivora	c. Phytophthora parasitica
b. Phytophthora nicotianae	d. Phytophthora cactorum

Q 6 Favourable temperature for bacterial blight development in pomegranate is

a. 30-34oC	c. 25-30oC
b. 20-30oC	d. 30-40oC

Q 7 Bacterial blight of pomegranate can develop faster under

a. 85-90% RH	c. 80-85% RH
b. 60-75% RH	d. 70-85% RH

Q 8 Most critical period in pomegranate disease development is

a. July-August	c. July-September
b. August-October	d. August-November

Q 9 Characteristic symptoms for bacterial blight of pomegranate includes

a. water soaked lesion with necrotic center	c. Oily brown to black spots on fruits
b. brown to black spots around the nodes	d. All of these

Q 10 Dark brown depressed symptoms on fruits are characteristic of

a. Cercospora leaf spot	c. Leaf spot
b. Fusarium wilt	d. Leaf and fruit spots

Fruit Tree Problems: Multiple Choice Questions on Pineapple diseases

Yesterday I posted questions on Jack Fruit diseases. Today I am posting questions on  pineapple diseases. These will help you to understand the crop better. You may answer these questions in comment box.

Q 1 Heart rot of pineapple caused by

a. Phytophthora cinnamomi	c. Phytopthora palmivora
b. Phytophthora cactorum	d. Phytophthora nicotianae

Q 2 Epidemiological conditions that favours heart rot diseases development are

a. Poor drainage	c. Alkaline soils
b. Cool and wet soils	d. All of these

Q 3 Heart rot of pineapple overwinters in the form of

a. Oospores	c. Sporangia
b. Zoospores	d. None of these

Q 4 Heart rot of pineapple can be managed by

a. Avoiding deep planting	c. Removal and destruction of diseased plant
b. Application of Bordeaux mixture	d. All of these

Q 5 Base rot is caused by

a. Ceratocystis fibriata	c. Cyratocystis platani
b. Cyratocystis paradoxa	d. Cyratocystis piceae

Q 6 Pineapple wilt virus is transmitted by

a. Aphids (Aphis gossypii)	c. Mealy bug (Dysmicocus brevipes)
b. Mite (Eriophyes inaequalis)	d. Seed corn maggot (Hylemyia cilicrura)

Q 7 Select the true statement with relation to pineapple wilt virus

a. High soil N reduces disease incidence	c. Hot water treatment can be done at 52oC
b. Hot water treatment can be done at 45oC	d. Low soil N reduces the disease incidence

Q 8 Pink disease of pineapple is caused by

a. Pantoea citrea	c. Botryobasidium salmonicolaor
b. Corticium salmonicolor	d. None of these

Q 9 Pineapple fruitlet core rot disease is caused by

a. Penicillium spp	c. Aspergillus spp.
b. Rhyzopus spp.	d. All of these

Q 10 Pantoea citrea is a

a. Gram-negative	c. facultative anaerobic
b. non-spore forming	d. All of these

Tomorrow I shall be posting the answers in comment box