Plant Pathology - Study Mode

[#481] Panama wilt is a disease of
Correct Answer

(D) Banana

Explanation

Solution: Panama wilt is a disease of Bananas. Panama disease, also called banana wilt, is a devastating disease of bananas caused by the soil-inhabiting fungus species Fusarium oxysporum forma specialis cubense. A form of fusarium wilt, Panama disease is widespread throughout the tropics and can be found wherever susceptible banana cultivars are grown.

[#482] MLO disease transmitted by
Correct Answer

(A) Leafhopper

Explanation

Solution: MLO disease transmitted by Leafhopper. Mycoplasma-like organisms (mycoplasmas, spiroplasmas and rickettsias) are generally considered to be somewhere between bacteria and viruses in size, shape and function. Mycoplasma-like organisms (MLOs) are microorganisms lacking cell Walls that cause phyllody and witches' broom as well as yellows diseases in various crop plants in Asia. These organisms are the cause of 'yellows' type diseases and are transmitted to plants during leafhopper feeding.

[#483] Which fungicide is used against downey mildew
Correct Answer

(A) Metalaxyl

Explanation

Solution: Metalaxyl fungicide is used against Downey mildew. Metalaxyl is a systemic fungicide used to control air- and soil-borne diseases on a wide range of crops, as well as foliar diseases caused by the Downey mildews. It is used to control plant diseases caused by Oomycete fungi. Its formulations include granules, wettable powders, dust and emulsifiable concentrates.

[#484] PRO-PLANT Expert system deals with
Correct Answer

(D) All of these

Explanation

Solution: PRO-PLANT Expert system deals with Cereals, potatoes and Sugarbeet. PRO PLANT is a consulting system for environmentally friendly plant protection in agriculture. The analysis of the weather-dependent infection events of fungi and the infestation development of parasites allows an exact determination of the time of spraying and reduces, with simultaneous high yield certainty, the number of sprayings to be carried out and their application rates.

[#485] Ovule is inverted with body fused to funcle, micropyle lying close to hilum and facing the placenta. It is
Correct Answer

(C) Anatropous

Explanation

Solution: The ovule is inverted with the body fused to the funicle, the micropyle lying close to the hilum and facing the placenta. It is Anatropous. An anatropous ovule is having or being a plant ovule inverted so that the micropyle is bent down to the funiculus to which the body of the ovule is united. It is one in which curvature during development results in the displacement of the micropyle to a position adjacent to the funiculus base, this is the most common ovule type of the angiosperms and is presumed to be ancestral.