Boll Weevils ravage Cotton plants in southern United States. Chemical Warfare Service prepares poisonous compounds for the eradication of Boll Weevil. Chemists keep the poisonous compounds in small covered containers. Boll weevil on a Cotton plant. Men pick cotton bolls that are not destroyed by the Boll Weevil. African American man smiles and holds a stem with a small cotton bloom. Cotton square and cotton bloom attacked by the pest.
Stages of Weevil's development in United States. Weevil deposits its eggs into the boll of cotton plant. Cotton boll with the eggs on a table. First stage is the formation of larva. Pupa emerges out of larva. At the last stage, weevil emerges out of the pupa.
Weevils fed toxic compounds and examined during a laboratory test in United States. Weevils stored for the tests in the laboratory. Man takes the container out of the store. Men test the poisonous compounds on the Weevils in a field. Glasses on a table contains poisonous compound.
Laboratory test of Weevils fed with toxic compounds in United States. Test glass containers with sand flooring, sprig of tender cotton plant moistened and poisoned. Chemists moisten the sprigs. They put poison on the sprigs. They examine the Weevils and keep a record of the Weevil. Dead Weevils picked and the poison is washed away. Man smokes cigar and picks the dead Weevils. A dead Weevil on a table.
Laboratory test of Weevils fed with toxic compounds, Weevils examined at Edgewood Arsenal in United States. Man smokes cigar and inspects the plants. Plant toxicity test to note the effect of poison on plant. Man examines a poisoned Weevil. He notes down the results. Test tubes on table. Man tests the compounds and Weevils in the test tubes. A cotton farm.
Pests destroy crops and other plants in United States. Close view of Brown Tail, Gypsy Moths, Japanese and the Mexican Bean Beetles.
CRITICALPAST.COM: About Us | Contact Us | FAQs - How to Order | License Agreement | My Account | My Lightboxes | Shopping Cart | Advanced Search | Featured Collections | Website Terms & Conditions | Privacy Policy | Links ©2024 CriticalPast LLC.
License Agreement |
Terms & Conditions |
Privacy Policy
©2024 CriticalPast LLC.