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Archive: Published Articles

ENVIRONMENT AND ECOLOGY

Interdisciplinary International Science Journal

Volume 41 (2023)
Issue 4D
Page No. 3082 

Authors:

 

K. Elango,

Arun kumar N.,

C. Nandhini, Dhanasekar V., Sowmiya D., Sowndarya S., Srinivasa Esakki Rajan E., Swetha S., Sanjay Raj N.

Environment and Ecology 41 (4D) : 3082—3086, October—December 2023
Article DOI: https://doi.org/10.60151/envec/RVIU6774
ISSN 0970-0420

Distribution, Phenology of Guava Sucking Pests under 
Ultra High Density Planting with Emphasis on Two 
Tailed Mealybug, Ferrisia virgata Cockerell 
(Pseudococcidae : Hemiptera) Management

K. Elango, Arun kumar N., C. Nandhini, Dhanasekar V., Sowmiya D., 
Sowndarya S., Srinivasa Esakki Rajan E., Swetha S., Sanjay Raj N.

Received 1 August 2023, Accepted 1 November 2023, Published on 29 December 2023

ABSTRACT

 

The experiment studies were carried out to assess the intensity of damage, phenology and management of major sucking pests of Guava under ultra high density planting during 2022-23. There are three important sucking pests viz., Two Tailed Mealybug, Ferrisia virgata Cockerell (Pseudococcidae :Hemiptera), invasive woolly whitefly, Aleurothrixus floccosus (Maskell) (Aleurodidae:Hemiptera) and spiraling whitefly, Aleurodicus dispersus (Russel) (Aleurodidae:Hemiptera) was documented in ultra high density planting of Guava. Under high density planting, Lucknow 49 variety was affected by more number of sucking pests viz., mealy bug (88.16%), wooly whitefly (1.85%) and guava scale (9.58%), respectively. The population of mealy bug Ferrisia virgata was maximum during first, second and third week of February with 45.1, 50.9 and 53.6 numbers /leaf/branch/tree. Weather parameters viz.,  minimum temperature for positively correlated with whereas maximum temperature, rainfall and relative humidity were negatively correlated with sucking pest population. Bio efficacy of different treatments was carried out against two tailed mealy bug under laboratory condition in contact method, Acetamiprid 20%  SP showed superior performance of with 85.00% mortality followed by imidacloprid17.8% SL (81.30% mortality at 24 HAT followed by azadirachtin 0.03% EC showed 64.00 percent mortality.
 

Keywords    Guava, Population dynamics, High density, Mealy bug and entomopathogen.

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