Three different injectors, each 25 mm in length and with diameters of 6, 4, and 3 mm, respectively, were tested with low-pressure injections of 250 ml of water into 23 different species of fruit-trees, woodland and ornamental trees at different times of year. The 6 and 4 mm injectors performed well, yielding uptake of 75±100% of water volume 1 or 48 h after injection, depending on the species; ...

Toosendanin as one kind of plant pesticide exists in the fruits, barks, and leaves of Melia azedarach L. (chinaberry tree). To obtain toosendanin, the sample was defatted with petroleum ether, extracted with ethanol; then the solution was concentrated, and extracted with ethyl acetate. Uniform design and regression analysis were employed to establish a model of extraction and optimize the proce...

Background & Aim: Aphids are of serious pests and vectors of multitude of viral diseases of field crops, vegetables, ‎and greenhouse crops. They have displayed a remarkable ability to establish resistance to ‎almost every insecticide with which it has been treated. To reduce the damage of these pests ‎and dependence on the sometimes unwise use of synthetic pesticides in crop and vegetable ‎plan...