Diseases of Vegetable, Ornamental and Spice Crops

QUESTIONS

Q1. Tick the correct option:
1. Chirkey and Foorkey are the important diseases of:

a) Small cardamom b) Large cardamom c) Nutmeg c) Black pepper.

2. Thread blight of nutmeg pathogen perennate in:

a) Soil b) Air c) Seed d) in dried up leaves.

3. Diplodia natalensis is associated with which disease if nutmeg:

a) Stem blight b) Leaf blight c) Stem canker d) Fruit rot.

4. Leaf streak of large cardamom caused by

a) Pestalotiopsis royenae b) Alternaria spp. c) Cercospora spp. d)Phakopsora elettariae.

5. Anthracnose of large cardamom is prevalent during

a) December to March b) April to September c) November to March d) July to September

6. The corn aphid vector for the Chirkey disease is

a) Ropholosiphum maydis b) Bemisia tabaci c) Diaphorina citri d) Pentalonia nigronervosa

7. Leaf spot and shot hole of Nutmeg is caused by

a) Colletotrichum gloeosporioides b) Pestalotiopsis royenae c) Phytophthora infestans d) Botrytis cinerea

Answer key

1. .b, 2. .d, 3 .d. 4. a 5. b 6. a 7. a

Q.2. Fill in the blanks

1. Rust in large cardamom is caused by ……………………
2. Chirkey disease of large cardamom is transmitted by ……………….
3. Foorkey disease of large cardamom was first reported by ……………..
4. Thread blight of nutmeg manifests two types i.e. …………………… and …………………. Die- back of nutmeg is caused by ……………………..
5. The ------------variety, with a ----------------pattern is more susceptible to leaf streak than the ------------------variety, which has smooth leaves.
6. Foorkey disease of large cardamom causes severe damage in ------------district of West Bengal and transmitted through -------------------------------.
7. White thread blight of nutmeg is caused by -------------------while horse hair blight is caused by----------------------.

Answers

1. Phakopsora elettariac 2.. Corn aphid Ropholosiphum maydis 3. Vasudeva, 1956 4. White thread blight, Horse hair blight, Diplodia spp. 5. Glosey, crinkled leaf, Sawney 6. Darjeeling, Pentalonia nigronervosa 7. Marasmius pulcherima, Marasmius equicrinus

Q.3. Write short note on characteristic symptoms of following diseases:

a. Leaf spot and shot hole of nutmeg
b. Thread blight of nutmeg
c. Chirkey disease
d. Foorkey disease

Q.4. Give sources of perennation and epidemiological factors of Thread blight of nutmeg
Q.5. Give control measures of Leaf spot and shot hole of the nutmeg.
Q.6. Give sources of perennation and epidemiological factors of Spike Rot, Root rot and collar Rot