30 Questions
What is the primary mode of transmission for the phytoplasma pathogen causing the disease?
Through aphids
What is the main effect of phytoplasma colonization on plants?
Blockage of photosynthates from leaves to stalks
What distinguishes phytoplasma from other pathogens in terms of cell structure?
Presence of a rigid cell wall
How does the disease affect the growth of sugarcane clumps?
Causes stunted growth and reduced tillering
What method is recommended for treating healthy setts before planting to manage the disease?
Treating with hot water at 52°C for 1 hour
Which insect is NOT mentioned as a secondary transmitter of the phytoplasma pathogen?
Aphis gossypii
How does the fungus responsible for red rot disease survive on collateral hosts?
By spreading through rain splash and air currents
How can conidia settle on leaves cause infection?
By germinating and invading through wounds
What is a recommended method for preventing red rot disease in sugarcane setts before planting?
Soaking in 0.1% Carbendazim or Triademefon solution
How can stem infection in sugarcane occur?
Via insect bores
What is a favorable condition that can contribute to the spread of red rot disease?
Water logged conditions
Which variety of sugarcane is recommended for its resistance to red rot disease?
CO 62198 and CO 7704
Which rust of wheat is also known as stem rust?
Black rust
What is the alternate host for Black rust (Stem rust) of wheat?
Berberis spp
Which rust of wheat exclusively attacks the leaf lamina?
Orange rust (Leaf rust)
Which rust of wheat has spherical spores with 7-10 germ pores?
Black rust (Stem rust)
What is the appearance of teliospores in Black rust (Stem rust) of wheat?
Bicelled and dark brown with a pointed or rounded tip
'Pustules large, elongated' is a characteristic description of which type of wheat rust pustules?
Black rust (Stem rust)
What is the color of the conidia produced by the pathogen Peronospora pisi?
Light yellow
Where does the downy growth of the pathogen appear in relation to the plant leaves?
Lower surface
How do infected stems of plants typically react to the infection by Peronospora pisi?
Show reduced growth
What is the term used to describe the finger-shaped structures sent inside host cells by the mycelium of Peronospora pisi?
Haustoria
Where do the conidiophores of Peronospora pisi emerge from?
Stomata
What happens to seeds lying corresponding to the symptoms on infected pods?
Abort and become undersized
What weather conditions favor the disease cycle initiation of Wilt of chickpea?
High temperature and low humidity
How is the primary infection of Wilt of chickpea initiated?
Through chlamydospores in soil
What is a recommended management practice for fields with heavy incidence of Wilt of chickpea?
Avoid cultivation of chickpea in that field for 3-4 years
Which genotypes possess resistance to Wilt of chickpea according to the text?
JG 130, JG 16, JG 14, JG 11
Which seed treatment is effective against Root rot and Wilt diseases in chickpea?
Prochloraz + Tebuconazole
How can the incidence of Wilt of chickpea be reduced through soil application?
Applying P.fluorescens + well decomposed FYM or sand
Learn about phytoplasma, single cell organisms that cause diseases in plants by colonizing sieve tube elements in the phloem system. Understand how they block the transport of photosynthates from leaves to stalks and roots, causing significant damage.
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