azedarach had strong antifeeding activities, but the petroleum ether extract of the seed kernel of M. azedarach attracted the beetles to feed more leaves. Neem oil showed antifeeding activity at a concentration of 3% to the beetles, Holotrichia ovata,but at a concentration of 1.4%, a very marked attraction to feeding was observed.
570 samples of corn kernel or ear rot were collected from 62 townships of 25 counties in Hanzhong, Baoji, Xianyang, Ankang, Shangluo and Yulin areas of Shaanxi Province from 1992 to 1993. Samples which had more than one-third kernels got rotting on each ear accounted for 35. 65%.
The results showed that the weed damage did not significantly affect grain weight and ear number of summer maize. The crop yield was mainly determined by kernel numbers per ear under the condition of the weed infestation.
The kernel of a certain derivation of the polynomial ringk is shown to be nonfinitely generated overk (a field of charactersitic zero), thus giving a new counterexample to Hilbert's Fourteenth Problem.
First we show that the representation ofG×G on eachG-biinvariant irreducible reproducing kernel Hilbert space in Hol(D) is a highest weight representation whose kernel is the character of a highest weight representation ofG.
Using the scalar automorphy kernel ofD, we construct a ?*,G-invariant kernel onD×D×D.
Taking a specific determination of its argument and studying its limit when approaching the Shilov boundary, we are able to define a ?-valued,G-invariant kernel for triples of mutually transversal points inS.
Approximation of Distribution Spaces by Means of Kernel Operators